Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over ... more Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over time freshets, thus floods constituted and constitute a particularly important issue that requires attention. In many cases, flood damages are extensive to the environment, to the economy and also socially. The purpose of this paper is to identify flood-prone areas between Caransebes and Lugoj, land that is part of the Timis river basin. This paper is based on a theoretical model in which we considered the building elements of the flood produced on the Timis river in April 2005 (levels and flows). to represent the zones flood – prone, we used the numerical model of the terrain, created for the abovementioned area. On this model , according to levels measured at hydrometric stations, were defined those flood prone areas. The Timis river hydrographic basin includes a varied terrain (mountains, hills and plains), with pronounced differences in altitude and massiveness, resulting from tectonic movements that have affected the region, this fact has affected water flow processes, both directly through fragmentation and slope, and indirectly, by creating the vertical climate, vegetation and soils zones. Using GIS technology to study hydrological phenomena and their impact on the geographic area are of particular importance due to the complexity of these techniques, which enables detailed analysis and analytical precision as well as an increased speed of the analysis. Creating theoretical models that give scale to the hydrological phenomena, in this case representing the flood areas, is of great practical importance because based on these models the areas can be defined and viewed, having the possibility of taking measures to prevent environmental effects on the natural and / or anthropogenic environment. In the studied area review of the flood of 2005, were represented flood areas, therefore, according with the researches, several villages, located in Timis valley or in the low lands, where the landscape decreases in altitude, were partially affected, also transport infrastructure (roads and railways) was covered by water in some areas, resulting in the isolation of villages; agricultural land located near or within the localities were flooded, situation that had negative consequences on their productivity. The data presented in this study support the importance and opportunity of using GIS techniques in the evaluation of the hydrological risk assessment, techniques through which tackling the problems that address the geographic area is of a global importance, thus giving clear indications to prevent and protect against destructive phenomena.
Remote sensing is of great interest for the study and characterization of the vegetation and of t... more Remote sensing is of great interest for the study and characterization of the vegetation and of the agricultural crops, in order to monitor them and to develop predictable patterns regarding the evolution of the crops and also for the purpose of the decision making process in real time. The main purpose of this research was the study of the sunflower crops dynamics based on spectral information obtained from satellite images. Vegetation dynamics was differently expressed by the indexes NDVI, NDBR and NDMI determined based on spectral information. NDVI has registered an ascending slope since the beginning of the vegetation period until the flowering (65 BBCH code) when the maximum value was recorded (NDVI GS6 = 0.4074). Later the distribution of this indicator recorded a descending slope until the physiological maturity. NDVI in correlation with the NIR band had lower values in the stages 12-14 BBCH code (p<0.01; R 2 = 0.642) and 80-81 BBCH code (p<0.01; R 2 = 0.605) and higher values at flowering stage, 65 BBCH code (p<0.01; R 2 = 0.966), and physiological maturity, 92-97 BBCH code (p<0.01; R 2 = 0.993; F = 3148.2). NDVI index has most closely correlated with vegetation phenophases and it highlighted, by the different level of correlation with the spectral information, the dynamics and variability in the sunflower crop.
Prin elipsoid de referinţă se înţelege elipsoidul terestru general, adoptat convenţional, care ap... more Prin elipsoid de referinţă se înţelege elipsoidul terestru general, adoptat convenţional, care aproximează cel mai bine geoidul. Suprafaţa acestui elipsoid este o suprafaţă pur geometrică şi convenţională, faţă de care se defineşte poziţia geoidului şi faţă de care se determină poziţia unor puncte de pe teren prin coordonate geografice.
Sistemul reprezintă un ansamblu de elemente interconectate care acţionează împreună în scopul rea... more Sistemul reprezintă un ansamblu de elemente interconectate care acţionează împreună în scopul realizării unui anumit obiectiv. SISTEM SISTEM INFORMAŢIONAL -SISTEM INFORMATIC • Sistemul Informaţional constituie ansamblul: informaţiilor surselor nivelelor consumatoare canalelor de circulaţie procedurilor • Sistemele informatice reprezintă partea automatizată cu ajutorul calculatorului în cadrul unui sistem informaţional Detalii topografice • Reprezintă anumite detalii "naturale" de pe suprafaţa terestră (ex: oceane, râuri, continente etc.) sau anumite detalii "construite" de către om (ex: judeţe, parcele, uat-uri etc.) • Un GIS este un ansamblu de persoane, echipamente, programe, metode şi norme (reguli) având ca scop culegerea, validarea, stocarea, analiza şi vizualizarea datelor geografice. Modul de realizare a unui G.I.S.
Environmental Engineering and Management Journal, 2023
The purpose of this research was to analyse the dynamics of remote sensing indices calculated bas... more The purpose of this research was to analyse the dynamics of remote sensing indices calculated based on Sentinel 2 satellite images over a period of 5 years: 2017-2021. The analysed area is a protected natural area in Western Romania. Remote sensing images were taken in approximately the same month of each year and based on them the remote sensing indexes was determined: NDVI, MSAVI2, NDSI, SI and BI. An unsupervised classification of the RGB image from 2017 and 2021 was also performed. Based on the remote sensing data, strong correlations have resulted between NDVI and SI, NDVI and NDSI, NDVI and MSAVI2, SI and NDSI, SI and MSAVI2, NDSI and MSAVI2. Considering the high level of correlations between NDVI and SI, NDSI, MSAVI2 indices, the regression analysis was used in evaluating the predictive relationship of each index based on the spectral values of the NDVI index. Prediction of SI, NDSI, MSAVI2 values based on spectral data of the NDVI index was possible with high statistic accuracy. For SI, the statistical security obtained was expressed by R 2 = 0.89576, for NDSI the statistical security obtained was expressed by R 2 = 0.9845 and for MSAVI2 the statistical security obtained was expressed by R 2 = 0.99988. This study presents a recent and efficient approach to monitor protected areas, based on spectral information provided by remote sensing. This study provides useful scientific information for the management of the studied protected area.
The study analyzed the interdependence relationships between the productivity elements of the whe... more The study analyzed the interdependence relationships between the productivity elements of the wheat ear and the content of photosynthetic pigments in the leaves, and described the causal relationships based on equations and graphic models. The study took place in the Didactic and Experimental Resort of the Life Science University "King Michael I" from Timisoara, Romania. The biological material was represented by the Solehio wheat variety. The content of chlorophyll (Chl) and carotenoids (Car) was determined in the booting stage (45 -47 BBCH code) in the five leaves on the stem (L1 to L5), according to the structural units (phytomers) specific to the Solehio variety. At physiological maturity (99 BBCH code), ear samples were taken and productivity elements were determined: spikelets number in ear, SN-E; fertile spikelets number in ear, FSN-E; grain number in spikelet, GN-S; grain number in ear, GN-E; grain weight in ear, GW-E; mean weight of a grain, MWG. Very strong and strong correlations were recorded between Chl and Car at the level of the studied leaves (e.g. r=0.937 in the case of L3, p<0.001; r=0.859 in the case of L5, p<0.01) and between the elements of productivity and leaves (e.g. between r=0.886, p<0.001; r=0.857, p<0.01; r=0.825, p<0.01). The regression analysis facilitated obtaining an equation and 3D models and in the form of isoquants, which described the variation of the productivity elements in relation to Chl and Car at the level of the flag leaf (L5), under statistical safety conditions (R 2 , p and RMSEP).
In the last decades, the floods are more frequent and having increased intensity, both in Romania... more In the last decades, the floods are more frequent and having increased intensity, both in Romania and worldwide. The process of estimating leaks in a river basin is extremely complicated and depends on several factors, including the meteorological and physical characteristics of the river basin. HEC-HMS hydrological simulation model is used to determine precipitation runoff from the river basin, using remote sensing and GIS tools. The results from the land pre-processing were used in HEC-GeoHMS to extract the hydrological parameters of the river basin. In this paper, the hydrographic method of the soil conservation unit was used to simulate the runoff rate, based on the precipitation recorded in the catchment of the Barzava River. After calibrating the hydrological model, the simulated discharges in the outlet section were close to the observed values.
The complex environmental process of soil erosion is crucial to sustainable land management and c... more The complex environmental process of soil erosion is crucial to sustainable land management and conservation. This study uses the Universal Soil Loss Equation (USLE) model to understand the intricate interactions that cause soil erosion in Cluj County, Romania, a region susceptible to complex erosion and landslide phenomenon. The established analysis depicts erosion patterns from localised hotspots to regions of relative stability, providing valuable insights into this critical issue. Spatial distribution maps with color-coded gradients show soil erosion risk and identify vulnerable regions, with temporal investigations depicting how environmental changes affect soil erosion, making it relevant to soil conservation and land management. A careful analysis of the USLE model's parameters (Ls, Cs, C, S, K) shows their soil erosion contributions. The erosion rates were graded in five classes in accordance to general practices of USLE modelling, which range from very-low, low, moderate, high and very-high susceptibility to soil erosion. While a significant majority of the county's surface is represented by very-low and low erosion risk, several hotspots were identified with intense erosion processes that highlights the critical need to implement soil conservation measures in the area.
The present study aimed to analyze and evaluate the barley crops, and also to estimate production... more The present study aimed to analyze and evaluate the barley crops, and also to estimate production by analyzing satellite images. The study was conducted at Didactic and Experimental Resort (DER) of BUASVM Timisoara, Timis County, Romania. The PlanetScope platform was used for the study, with a spatial resolution of 3 m. The satellite images were taken in the PlanetScope Remote Sensing System, at 7 different moments, between 27 March and 27 June 2020. Based on spectral data, MSAVI2 and NDVI indices were calculated. Four plots cultivated with barley were studied (B/ A75, B/A80, B/A82 and B/A84). The variation of the MSAVI2 and NDVI indices in relation to the time factor (T, days), over the study interval, was described by the polynomial models of 2 nd degree, in statistical accuracy conditions. Based on the regression analysis, the estimation of the production based on the MSAVI2 and NDVI indices was possible under the conditions of R 2 =0.998, P<0.05 for plot B/A75, R 2 =0.999, P<0.05 for plot B/A80, R 2 =0.997, P=0.0577 for plot B/ A82 and respectively, R 2 =0.999, P<0.05 for plot B/A84. From the calculation of the RMSEP index, for the estimated productions, the values were obtained: RMSEP=80.8162 for Y B/A75 , RMSEP=50.1633 for Y B/A80 , RMSEP=192.3947 for Y B/ A82 and respectively RMSEP=112.2899 for Y B/A84 . The value of RMSEP=50.1633 for Y B/A80 confirms that for the plot B/ A80 the production estimate was made with the highest precision.
Rationale: Water loss by evaporation is a normal physiological process, in order to regulate plan... more Rationale: Water loss by evaporation is a normal physiological process, in order to regulate plant temperature. Under conditions of thermal and water stress, water loss is accelerated compared to normal conditions, and the response of plants is variable. In extreme cases, it can lead to wilting and death of plants. It was found that the phenomenon of water loss behaved as a pattern in different plant species, given by two functions, logistics (first part of water loss) and hyperbola (second part of water loss) in relation to a moment m, at which the rate of water loss (RWL) has reached its maximum value. Method: We studied the water loss process for a series of plant samples on different plant species (Picea abies L., H. Karst; Juniperus communis L.; Pinus silvestris L.; Thuja occidentalis L.; Lamium purpureum L.; Veronica hederifolia L.), measuring the rate of weight loss (RWL) in controlled conditions. The drying of the samples was done in identical conditions (thermo-balance, 100...
DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2012
Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over ... more Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over time freshets, thus floods constituted and constitute a particularly important issue that requires attention. In many cases, flood damages are extensive to the environment, to the economy and also socially. The purpose of this paper is to identify flood-prone areas between Caransebes and Lugoj, land that is part of the Timis river basin. This paper is based on a theoretical model in which we considered the building elements of the flood produced on the Timis river in April 2005 (levels and flows). to represent the zones flood – prone, we used the numerical model of the terrain, created for the abovementioned area. On this model , according to levels measured at hydrometric stations, were defined those flood prone areas. The Timis river hydrographic basin includes a varied terrain (mountains, hills and plains), with pronounced differences in altitude and massiveness, resulting from tectonic movements that have affected the region, this fact has affected water flow processes, both directly through fragmentation and slope, and indirectly, by creating the vertical climate, vegetation and soils zones. Using GIS technology to study hydrological phenomena and their impact on the geographic area are of particular importance due to the complexity of these techniques, which enables detailed analysis and analytical precision as well as an increased speed of the analysis. Creating theoretical models that give scale to the hydrological phenomena, in this case representing the flood areas, is of great practical importance because based on these models the areas can be defined and viewed, having the possibility of taking measures to prevent environmental effects on the natural and / or anthropogenic environment. In the studied area review of the flood of 2005, were represented flood areas, therefore, according with the researches, several villages, located in Timis valley or in the low lands, where the landscape decreases in altitude, were partially affected, also transport infrastructure (roads and railways) was covered by water in some areas, resulting in the isolation of villages; agricultural land located near or within the localities were flooded, situation that had negative consequences on their productivity. The data presented in this study support the importance and opportunity of using GIS techniques in the evaluation of the hydrological risk assessment, techniques through which tackling the problems that address the geographic area is of a global importance, thus giving clear indications to prevent and protect against destructive phenomena.
This study aimed at characterising and analysing the geometry of bark in the species Fraxinus ang... more This study aimed at characterising and analysing the geometry of bark in the species Fraxinus angustifolia Vahl. (ash) through fractal analysis. Binarised images of the ash bark captured from a caption distance between 10 and 50 cm every 5 cm were analysed through box-counting. Depending on the pixels analysed (black and white-BW, black + black and white-B+BW, and white + black and white-W+BW) we obtained fractal dimensions DBW, DB+BW, and DW+BW, respectively. There was a high positive correlation between fractal dimensions and image caption distance: r = 0.895 for DBW, r = 0.787 for DB+BW, and r = 0.820 for DW+BW, respectively. The relationship of interdependence between fractal dimensions and image caption distance was described by second degree polynomial equations with statistic safety,
Adequate management of agricultural crops requires, among other things, accessible and sufficient... more Adequate management of agricultural crops requires, among other things, accessible and sufficiently accurate methods for assessing plant nutrition and crop vegetation status and for agricultural production estimation. Sustainable technologies are based on correct decisions, prompt interventions and appropriate works, and correct information in real time, and the obtaining information methods can be simple, accessible, and appropriate in relation to different user categories (e.g., farmers, researchers, decision makers). This study used mineral fertilization (NPK), with 11 experimental variants, to ensure a controlled differentiated nutrition of the wheat plants, “Alex” cultivar. Regression analysis was used to obtain models in estimating wheat production, by methods based on: (a) NPK fertilizers applied (F) in the 11 experimental variants; (b) physiological indices (PI), represented by the chlorophyll content (Chl), and plant nutrition status on the experimental variants, in terms o...
Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over ... more Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over time freshets, thus floods constituted and constitute a particularly important issue that requires attention. In many cases, flood damages are extensive to the environment, to the economy and also socially. The purpose of this paper is to identify flood-prone areas between Caransebes and Lugoj, land that is part of the Timis river basin. This paper is based on a theoretical model in which we considered the building elements of the flood produced on the Timis river in April 2005 (levels and flows). to represent the zones flood – prone, we used the numerical model of the terrain, created for the abovementioned area. On this model , according to levels measured at hydrometric stations, were defined those flood prone areas. The Timis river hydrographic basin includes a varied terrain (mountains, hills and plains), with pronounced differences in altitude and massiveness, resulting from tectonic movements that have affected the region, this fact has affected water flow processes, both directly through fragmentation and slope, and indirectly, by creating the vertical climate, vegetation and soils zones. Using GIS technology to study hydrological phenomena and their impact on the geographic area are of particular importance due to the complexity of these techniques, which enables detailed analysis and analytical precision as well as an increased speed of the analysis. Creating theoretical models that give scale to the hydrological phenomena, in this case representing the flood areas, is of great practical importance because based on these models the areas can be defined and viewed, having the possibility of taking measures to prevent environmental effects on the natural and / or anthropogenic environment. In the studied area review of the flood of 2005, were represented flood areas, therefore, according with the researches, several villages, located in Timis valley or in the low lands, where the landscape decreases in altitude, were partially affected, also transport infrastructure (roads and railways) was covered by water in some areas, resulting in the isolation of villages; agricultural land located near or within the localities were flooded, situation that had negative consequences on their productivity. The data presented in this study support the importance and opportunity of using GIS techniques in the evaluation of the hydrological risk assessment, techniques through which tackling the problems that address the geographic area is of a global importance, thus giving clear indications to prevent and protect against destructive phenomena.
Remote sensing is of great interest for the study and characterization of the vegetation and of t... more Remote sensing is of great interest for the study and characterization of the vegetation and of the agricultural crops, in order to monitor them and to develop predictable patterns regarding the evolution of the crops and also for the purpose of the decision making process in real time. The main purpose of this research was the study of the sunflower crops dynamics based on spectral information obtained from satellite images. Vegetation dynamics was differently expressed by the indexes NDVI, NDBR and NDMI determined based on spectral information. NDVI has registered an ascending slope since the beginning of the vegetation period until the flowering (65 BBCH code) when the maximum value was recorded (NDVI GS6 = 0.4074). Later the distribution of this indicator recorded a descending slope until the physiological maturity. NDVI in correlation with the NIR band had lower values in the stages 12-14 BBCH code (p<0.01; R 2 = 0.642) and 80-81 BBCH code (p<0.01; R 2 = 0.605) and higher values at flowering stage, 65 BBCH code (p<0.01; R 2 = 0.966), and physiological maturity, 92-97 BBCH code (p<0.01; R 2 = 0.993; F = 3148.2). NDVI index has most closely correlated with vegetation phenophases and it highlighted, by the different level of correlation with the spectral information, the dynamics and variability in the sunflower crop.
Prin elipsoid de referinţă se înţelege elipsoidul terestru general, adoptat convenţional, care ap... more Prin elipsoid de referinţă se înţelege elipsoidul terestru general, adoptat convenţional, care aproximează cel mai bine geoidul. Suprafaţa acestui elipsoid este o suprafaţă pur geometrică şi convenţională, faţă de care se defineşte poziţia geoidului şi faţă de care se determină poziţia unor puncte de pe teren prin coordonate geografice.
Sistemul reprezintă un ansamblu de elemente interconectate care acţionează împreună în scopul rea... more Sistemul reprezintă un ansamblu de elemente interconectate care acţionează împreună în scopul realizării unui anumit obiectiv. SISTEM SISTEM INFORMAŢIONAL -SISTEM INFORMATIC • Sistemul Informaţional constituie ansamblul: informaţiilor surselor nivelelor consumatoare canalelor de circulaţie procedurilor • Sistemele informatice reprezintă partea automatizată cu ajutorul calculatorului în cadrul unui sistem informaţional Detalii topografice • Reprezintă anumite detalii "naturale" de pe suprafaţa terestră (ex: oceane, râuri, continente etc.) sau anumite detalii "construite" de către om (ex: judeţe, parcele, uat-uri etc.) • Un GIS este un ansamblu de persoane, echipamente, programe, metode şi norme (reguli) având ca scop culegerea, validarea, stocarea, analiza şi vizualizarea datelor geografice. Modul de realizare a unui G.I.S.
Environmental Engineering and Management Journal, 2023
The purpose of this research was to analyse the dynamics of remote sensing indices calculated bas... more The purpose of this research was to analyse the dynamics of remote sensing indices calculated based on Sentinel 2 satellite images over a period of 5 years: 2017-2021. The analysed area is a protected natural area in Western Romania. Remote sensing images were taken in approximately the same month of each year and based on them the remote sensing indexes was determined: NDVI, MSAVI2, NDSI, SI and BI. An unsupervised classification of the RGB image from 2017 and 2021 was also performed. Based on the remote sensing data, strong correlations have resulted between NDVI and SI, NDVI and NDSI, NDVI and MSAVI2, SI and NDSI, SI and MSAVI2, NDSI and MSAVI2. Considering the high level of correlations between NDVI and SI, NDSI, MSAVI2 indices, the regression analysis was used in evaluating the predictive relationship of each index based on the spectral values of the NDVI index. Prediction of SI, NDSI, MSAVI2 values based on spectral data of the NDVI index was possible with high statistic accuracy. For SI, the statistical security obtained was expressed by R 2 = 0.89576, for NDSI the statistical security obtained was expressed by R 2 = 0.9845 and for MSAVI2 the statistical security obtained was expressed by R 2 = 0.99988. This study presents a recent and efficient approach to monitor protected areas, based on spectral information provided by remote sensing. This study provides useful scientific information for the management of the studied protected area.
The study analyzed the interdependence relationships between the productivity elements of the whe... more The study analyzed the interdependence relationships between the productivity elements of the wheat ear and the content of photosynthetic pigments in the leaves, and described the causal relationships based on equations and graphic models. The study took place in the Didactic and Experimental Resort of the Life Science University "King Michael I" from Timisoara, Romania. The biological material was represented by the Solehio wheat variety. The content of chlorophyll (Chl) and carotenoids (Car) was determined in the booting stage (45 -47 BBCH code) in the five leaves on the stem (L1 to L5), according to the structural units (phytomers) specific to the Solehio variety. At physiological maturity (99 BBCH code), ear samples were taken and productivity elements were determined: spikelets number in ear, SN-E; fertile spikelets number in ear, FSN-E; grain number in spikelet, GN-S; grain number in ear, GN-E; grain weight in ear, GW-E; mean weight of a grain, MWG. Very strong and strong correlations were recorded between Chl and Car at the level of the studied leaves (e.g. r=0.937 in the case of L3, p<0.001; r=0.859 in the case of L5, p<0.01) and between the elements of productivity and leaves (e.g. between r=0.886, p<0.001; r=0.857, p<0.01; r=0.825, p<0.01). The regression analysis facilitated obtaining an equation and 3D models and in the form of isoquants, which described the variation of the productivity elements in relation to Chl and Car at the level of the flag leaf (L5), under statistical safety conditions (R 2 , p and RMSEP).
In the last decades, the floods are more frequent and having increased intensity, both in Romania... more In the last decades, the floods are more frequent and having increased intensity, both in Romania and worldwide. The process of estimating leaks in a river basin is extremely complicated and depends on several factors, including the meteorological and physical characteristics of the river basin. HEC-HMS hydrological simulation model is used to determine precipitation runoff from the river basin, using remote sensing and GIS tools. The results from the land pre-processing were used in HEC-GeoHMS to extract the hydrological parameters of the river basin. In this paper, the hydrographic method of the soil conservation unit was used to simulate the runoff rate, based on the precipitation recorded in the catchment of the Barzava River. After calibrating the hydrological model, the simulated discharges in the outlet section were close to the observed values.
The complex environmental process of soil erosion is crucial to sustainable land management and c... more The complex environmental process of soil erosion is crucial to sustainable land management and conservation. This study uses the Universal Soil Loss Equation (USLE) model to understand the intricate interactions that cause soil erosion in Cluj County, Romania, a region susceptible to complex erosion and landslide phenomenon. The established analysis depicts erosion patterns from localised hotspots to regions of relative stability, providing valuable insights into this critical issue. Spatial distribution maps with color-coded gradients show soil erosion risk and identify vulnerable regions, with temporal investigations depicting how environmental changes affect soil erosion, making it relevant to soil conservation and land management. A careful analysis of the USLE model's parameters (Ls, Cs, C, S, K) shows their soil erosion contributions. The erosion rates were graded in five classes in accordance to general practices of USLE modelling, which range from very-low, low, moderate, high and very-high susceptibility to soil erosion. While a significant majority of the county's surface is represented by very-low and low erosion risk, several hotspots were identified with intense erosion processes that highlights the critical need to implement soil conservation measures in the area.
The present study aimed to analyze and evaluate the barley crops, and also to estimate production... more The present study aimed to analyze and evaluate the barley crops, and also to estimate production by analyzing satellite images. The study was conducted at Didactic and Experimental Resort (DER) of BUASVM Timisoara, Timis County, Romania. The PlanetScope platform was used for the study, with a spatial resolution of 3 m. The satellite images were taken in the PlanetScope Remote Sensing System, at 7 different moments, between 27 March and 27 June 2020. Based on spectral data, MSAVI2 and NDVI indices were calculated. Four plots cultivated with barley were studied (B/ A75, B/A80, B/A82 and B/A84). The variation of the MSAVI2 and NDVI indices in relation to the time factor (T, days), over the study interval, was described by the polynomial models of 2 nd degree, in statistical accuracy conditions. Based on the regression analysis, the estimation of the production based on the MSAVI2 and NDVI indices was possible under the conditions of R 2 =0.998, P<0.05 for plot B/A75, R 2 =0.999, P<0.05 for plot B/A80, R 2 =0.997, P=0.0577 for plot B/ A82 and respectively, R 2 =0.999, P<0.05 for plot B/A84. From the calculation of the RMSEP index, for the estimated productions, the values were obtained: RMSEP=80.8162 for Y B/A75 , RMSEP=50.1633 for Y B/A80 , RMSEP=192.3947 for Y B/ A82 and respectively RMSEP=112.2899 for Y B/A84 . The value of RMSEP=50.1633 for Y B/A80 confirms that for the plot B/ A80 the production estimate was made with the highest precision.
Rationale: Water loss by evaporation is a normal physiological process, in order to regulate plan... more Rationale: Water loss by evaporation is a normal physiological process, in order to regulate plant temperature. Under conditions of thermal and water stress, water loss is accelerated compared to normal conditions, and the response of plants is variable. In extreme cases, it can lead to wilting and death of plants. It was found that the phenomenon of water loss behaved as a pattern in different plant species, given by two functions, logistics (first part of water loss) and hyperbola (second part of water loss) in relation to a moment m, at which the rate of water loss (RWL) has reached its maximum value. Method: We studied the water loss process for a series of plant samples on different plant species (Picea abies L., H. Karst; Juniperus communis L.; Pinus silvestris L.; Thuja occidentalis L.; Lamium purpureum L.; Veronica hederifolia L.), measuring the rate of weight loss (RWL) in controlled conditions. The drying of the samples was done in identical conditions (thermo-balance, 100...
DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2012
Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over ... more Flood risk assessment in Timis River basin-the Caransebes-Lugoj sector-using GIS technique. Over time freshets, thus floods constituted and constitute a particularly important issue that requires attention. In many cases, flood damages are extensive to the environment, to the economy and also socially. The purpose of this paper is to identify flood-prone areas between Caransebes and Lugoj, land that is part of the Timis river basin. This paper is based on a theoretical model in which we considered the building elements of the flood produced on the Timis river in April 2005 (levels and flows). to represent the zones flood – prone, we used the numerical model of the terrain, created for the abovementioned area. On this model , according to levels measured at hydrometric stations, were defined those flood prone areas. The Timis river hydrographic basin includes a varied terrain (mountains, hills and plains), with pronounced differences in altitude and massiveness, resulting from tectonic movements that have affected the region, this fact has affected water flow processes, both directly through fragmentation and slope, and indirectly, by creating the vertical climate, vegetation and soils zones. Using GIS technology to study hydrological phenomena and their impact on the geographic area are of particular importance due to the complexity of these techniques, which enables detailed analysis and analytical precision as well as an increased speed of the analysis. Creating theoretical models that give scale to the hydrological phenomena, in this case representing the flood areas, is of great practical importance because based on these models the areas can be defined and viewed, having the possibility of taking measures to prevent environmental effects on the natural and / or anthropogenic environment. In the studied area review of the flood of 2005, were represented flood areas, therefore, according with the researches, several villages, located in Timis valley or in the low lands, where the landscape decreases in altitude, were partially affected, also transport infrastructure (roads and railways) was covered by water in some areas, resulting in the isolation of villages; agricultural land located near or within the localities were flooded, situation that had negative consequences on their productivity. The data presented in this study support the importance and opportunity of using GIS techniques in the evaluation of the hydrological risk assessment, techniques through which tackling the problems that address the geographic area is of a global importance, thus giving clear indications to prevent and protect against destructive phenomena.
This study aimed at characterising and analysing the geometry of bark in the species Fraxinus ang... more This study aimed at characterising and analysing the geometry of bark in the species Fraxinus angustifolia Vahl. (ash) through fractal analysis. Binarised images of the ash bark captured from a caption distance between 10 and 50 cm every 5 cm were analysed through box-counting. Depending on the pixels analysed (black and white-BW, black + black and white-B+BW, and white + black and white-W+BW) we obtained fractal dimensions DBW, DB+BW, and DW+BW, respectively. There was a high positive correlation between fractal dimensions and image caption distance: r = 0.895 for DBW, r = 0.787 for DB+BW, and r = 0.820 for DW+BW, respectively. The relationship of interdependence between fractal dimensions and image caption distance was described by second degree polynomial equations with statistic safety,
Adequate management of agricultural crops requires, among other things, accessible and sufficient... more Adequate management of agricultural crops requires, among other things, accessible and sufficiently accurate methods for assessing plant nutrition and crop vegetation status and for agricultural production estimation. Sustainable technologies are based on correct decisions, prompt interventions and appropriate works, and correct information in real time, and the obtaining information methods can be simple, accessible, and appropriate in relation to different user categories (e.g., farmers, researchers, decision makers). This study used mineral fertilization (NPK), with 11 experimental variants, to ensure a controlled differentiated nutrition of the wheat plants, “Alex” cultivar. Regression analysis was used to obtain models in estimating wheat production, by methods based on: (a) NPK fertilizers applied (F) in the 11 experimental variants; (b) physiological indices (PI), represented by the chlorophyll content (Chl), and plant nutrition status on the experimental variants, in terms o...
The aim of the study was to evaluate the phenomenon of land tilting and the tilting distance as a... more The aim of the study was to evaluate the phenomenon of land tilting and the tilting distance as a secondary effect of surface coal mining in the Jiu Valley area, Romania. To evaluate the tilting phenomenon, through the two considered elements (inclination – Lt, tilting distance – Td) 16 control points (CP1 to CP16) were used whose coordinates were measured in the Stereographic 1970 projection system, the 1975 Black Sea elevation system at an initial moment (t0) and at the current moment (t1). The static method was used by GPS technology to measure the elevations of the control points. Through descriptive statistical analysis, a general characterization of the set of recorded values was obtained, and the ANOVA test confirmed the safety of the data and the presence of variance in the data set. From the analysis of the recorded values, a Spline type model was obtained that described the variation of Lt in relation to Td, under conditions of statistical safety ( ɛ¯ = 0.137302). Regressi...
Jupa village belongs to the municipality of Caransebes. In 1795, the Capra Mansion was built in J... more Jupa village belongs to the municipality of Caransebes. In 1795, the Capra Mansion was built in Jupa village, an imposing building around which Jupa Park was created. Both the mansion and the surrounding park have undergone dramatic changes in the last century. A general landscape analysis was performed based on the GIS and GNSS technologies. An inventory of the wood vegetation was also made and its ornamental value and vitality were assessed. The remnant 11 taxa were identified as follows: 10 tree species (5 native and 5 exotic broadleave trees) and 1 fruit tree. The present-day park landscape is the result of the long-term interaction of the park species with anthropic activities in a rural context. In order to restore a functional green space for the local community of Jupa village, a plan of rearrangement was conceived in compliance with the landscape architecture principles.
The purpose of this paper is to present a modern approach used to establish the Local Registry of... more The purpose of this paper is to present a modern approach used to establish the Local Registry of Green Cadastre of the public administrative territory of Caransebeş Municipality. Topographic measurements of green areas and the tree inventory database have been performed with the latest generation GIS and GNSS instruments. More than 7,000 trees were identified taxonomically and their geographical coordinates and biometric data were determined. All the field data was loaded into an updatable database and processed using the ArcGIS v.10.3 software. A GIS map with all the Green Cadastre information was realized as a useful instrument for the Municipality in order to easily monitor and permanently have an actual image of their green areas situation. Additionally, 48 hectares of green areas have been identified and measured as future potential objects for new projects to be financed in order to improve their citizen’s welfare
In order to achieve or complete the 1: 1.000 scale situation plan and the digital terrain model f... more In order to achieve or complete the 1: 1.000 scale situation plan and the digital terrain model for the Timişoara-Sibiu highway section, and given the difficult access conditions in the project area, it was decided to use photogrammetric techniques for extraction of spatial information needed for mapping. In order to achieve the mapping requirements at a scale of 1: 1.000, the following activities were performed: Realization of the geodetic support network; Realization of the aerial photography project; Making pre-marking points in areas without clear details or other location possibilities; Simultaneous aerial photography of sub-blocks at different flight heights to ensure a 12 cm pixel and simultaneous laser scanning with LiDAR system; Identification of marking and pre-marking points on the subblock frames; Performing GPS measurements to determine the coordinates of landmarks and photogrammetric pre-marking; LIDAR data processing using permanent GPS stations to obtain coordinates in the ETRS89 system and transform them into the STEREO70 system and Black Sea reference plan 75; Calibration of LIDAR data; Filtering LIDAR data; Realization of aerotriangulation on subblocks or bands; Stereo restitution of planimetric and altimetric details for 1: 1.000 scale (3D mode); Transforming 3D plans into 2D plans; Editing and elaborating topographic plans.
Remote sensing is of great interest for the study and characterization of the vegetation and of t... more Remote sensing is of great interest for the study and characterization of the vegetation and of the agricultural crops, in order to monitor them and to develop predictable patterns regarding the evolution of the crops and also for the purpose of the decision making process in real time. The main purpose of this research was the study of the sunflower crops dynamics based on spectral information obtained from satellite images. Vegetation dynamics was differently expressed by the indexes NDVI, NDBR and NDMI determined based on spectral information. NDVI has registered an ascending slope since the beginning of the vegetation period until the flowering (65 BBCH code) when the maximum value was recorded (NDVI GS6 = 0.4074). Later the distribution of this indicator recorded a descending slope until the physiological maturity. NDVI in correlation with the NIR band had lower values in the stages 12-14 BBCH code (p<0.01; R 2 = 0.642) and 80-81 BBCH code (p<0.01; R 2 = 0.605) and higher...
The analyzed projections from this paper are cartographical projections of great importance in pr... more The analyzed projections from this paper are cartographical projections of great importance in practice, solving cartographical problems regarding map drawing based on practical needs. These are the ones referring to terrain surfaces that will be represented, to the accuracy that must be obtained, as well as the ways to accomplish favorable and precise links with other kinds of cartographical projections. Cylindrical Projection (Mercator): is based on a cylinder tangent to the equator. Good for equatorial regions but greatly distorted at high latitudes. This one of the oldest and most common projectionsThe maps in Mercator projection have a great importance in maritime and air navigation, due to the fact that it is a conform projection and the cartographic network formed in perpendicular lines, the loxodrome will be a straight line. The same line makes with each projection of the meridians the same azimuth. The UTM system that uses the Mercator projection can be used all over the wo...
The areas affected by the mining exploitations are mono-industrial and the appearance of potentia... more The areas affected by the mining exploitations are mono-industrial and the appearance of potential directions for developing them are very linked to the results of the influence of these mining exploitations over the environment. The effects of the underground mining exploitations are the displacement and deformation of the terrain around the exploitation. To study the influence of this underground exploitation over the area is necessary for putting into evidence the phenomenon of displacement and taking the measures for protecting the objectives executed on the surface and the surface itself. So, the development of the infrastructure, the tourism, services, the implementation of different projects in order to have a sustainable development of Petrosani town must be made by analyzing very carefully the phenomenon of displacement and deformation of the terrestrial area under the influence of the underground exploitation.
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