Papers by Adrienne Grêt-regamey
Landscape and Urban Planning, 2015
ABSTRACT In order to find negotiable solutions for spatial planning and landscape development, sc... more ABSTRACT In order to find negotiable solutions for spatial planning and landscape development, scenario analysis would profit from knowledge about the trade-offs people make in their policy objectives given a certain landscape scenario. To facilitate the development of normative landscape scenarios, the output of a land-use decision model was visualized in 3D, establishing a relationship between policy influence factors (as model drivers) and the 3D visualizations. A survey tool was developed for eliciting the preferences for these 3D visualizations and the respective policy measures. In this contribution, we present the survey tool tested in a case study from a pre-Alpine area in central Switzerland. Results show participants’ preferences for extensive agricultural land use and limitation of urban sprawl. The trade-off analysis shows how participants compare and choose among different policy objectives to reach a possible solution given their choice of a future landscape. The trade-off pathway most often observed reinforces the chosen visualization in terms of policy measures. In the discussion, we consider the advantages and disadvantages of this survey tool and conclude that it is an effective way to support the development of normative landscape scenarios in participatory planning processes.
Computers, Environment and Urban Systems, 2014
ABSTRACT Urban green spaces offer multiple ecosystem services (ES), which provide a variety of be... more ABSTRACT Urban green spaces offer multiple ecosystem services (ES), which provide a variety of benefits to human well-being. Yet in urban planning they are not taken into account systematically. Recently new tools have been developed integrating ES into procedural modeling and visualization to raise stakeholder awareness for the explicit ES trade-offs that have to be made. These tools yet do not allow fast and comprehensive integration of ES provision in urban environments. In this paper we show how urban green space typologies can be linked to ES provision for facilitating collaboration between stakeholders of different backgrounds. Based on a generic typology green spaces were mapped and linked with information on potentially provided ES and their parameters. Further, pattern designs of the green space types were described with a form-based code. Both the map of green space types and the pattern designs were integrated into the parametric modeling and visualization chain of Esri CityEngine resulting in 3D visualizations of the green space patterns and correlating ES indicators. The green space typology allows for integrating different kinds of knowledge from both science and practice communities. The procedural model enables rapid interactive visualization of urban patterns and calculation of simple indicator values on the provision of ES. The simple approach for mapping green space types with low data requirements and the generic green space design patterns allow for transferability to other places and application to large areas. The developed approach is simple and fast yet comprehensive to communicate the vital importance of all green space types within the urban environment.
Land Use Policy, 2014
Farmers are decision-makers in a complex system of cause and effect. They decide with respect to ... more Farmers are decision-makers in a complex system of cause and effect. They decide with respect to their own attitude and beliefs, according to their farm structure and they take into account programs and regulations of the overarching policy scheme. In this paper we used mail surveys with identical questions to establish a cross-national comparison of two case study areas. The questionnaire investigates farmer's perspectives on what influences their own decision-making as well as their perception of the socioecological environment to relate these findings to the respective policy schemes in the case study areas. The two case studies are located in Southern Illinois, United States and in central Switzerland. The analysis shows that full-time farmers of the Southern Illinois case study area rate constraining factors such as financial aspects higher than Southern Illinois part-time farmers and farmers from the central Switzerland case study area. Furthermore, it is apparent that Swiss case study-farmers rate aspects of their land use responsibility and the Illinois case study-farmers rate ecological aspects higher. The empirical findings can be qualitatively explained through analysis of agricultural policy schemes.
Continuing pressure on urban areas due to growing population and further urbanization affects urb... more Continuing pressure on urban areas due to growing population and further urbanization affects urban quality. Many cities and agglomerations try to cope with negative effects of urban sprawl by further densification of existing built-up areas. As a consequence green and open spaces are disappearing. Among other ecological and socio-economic urban qualities, this is affecting the sense of a place and place attachment of the local inhabitants. However, there are no indicators available, which allow in planning processes for an effective assessment of the impact of further densification on the urban landscape's identity. One challenge is that assessing the impact on the landscape's identity requires both objective and subjective approaches. Objective approaches are well established, for example, in environmental impact assessments untypical elements of a landscape contributing to a loss in landscape aesthetics and character are evaluated. However, these approaches are rather applicable on the rural than on the urban landscape. Furthermore, subjective approaches still lack of suitable tools for integrating individual perceptions of stakeholders into the evaluation process.
While design is increasingly being recognized as common ground to bring scientific knowledge into... more While design is increasingly being recognized as common ground to bring scientific knowledge into decision making enacting landscape change, it has mostly been used to create place specific responses expressing particular values until now, rather than framing the natural and physical sciences to become more salient, find legitimation, and consequently have a greater and longer lasting effect on landscape change. Inverting the design approach by first assessing values and then modelling the functionality of the system to infer possible management strategies can better help incorporate scientific knowledge in local place making.
We model urban behavior at district and at parcel scale to generate integrated and GIS-based 3D v... more We model urban behavior at district and at parcel scale to generate integrated and GIS-based 3D visualizations of possible urban scenarios.
Two-dimensional avalanche simulation software operating in three-dimensional terrain is widely us... more Two-dimensional avalanche simulation software operating in three-dimensional terrain is widely used for hazard zoning and engineering to predict runout distances and impact pressures of snow avalanche events. Mountain forests are an effective biological protection measure; however, the protective capacity of forests to decelerate or even 5 to stop avalanches that start within forested areas or directly above the treeline is seldom considered in this context. In particular, runout distances of small-to mediumscale avalanches are strongly influenced by the structural conditions of forests in the avalanche path. We present an evaluation and improvement of a novel forest detrainment function implemented in the avalanche simulation software RAMMS for 10 avalanche simulation in forested terrain. The new approach accounts for the effect of forests in the avalanche path by detraining mass, which leads to a deceleration and runout shortening of avalanches. The relationship is parameterized by the detrainment coefficient K (Pa) accounting for differing forest characteristics. We varied K when simulating 40 well-documented small-to medium-scale avalanches which released in 15 and ran through forests of the Swiss Alps. Analyzing and comparing observed and simulated runout distances statistically revealed values for K suitable to simulate the combined influence of four forest characteristics on avalanche runout: forest type, crown closure, vertical structure and surface roughness, e.g. values for K were higher for dense spruce and mixed spruce-beech forests compared to open larch forests at 20 the upper treeline. Considering forest structural conditions within avalanche simulation will improve current applications for avalanche simulation tools in mountain forest and natural hazard management.
2013. Trade-offs between ecosystem services in a mountain region. Ecology and Society 18(3): 35. ... more 2013. Trade-offs between ecosystem services in a mountain region. Ecology and Society 18(3): 35. http://dx.
... Sabrina Krank,1* Holger Wallbaum1 and Adrienne Grêt-Regamey2 ... et al., 2008; Mitchell, 1996... more ... Sabrina Krank,1* Holger Wallbaum1 and Adrienne Grêt-Regamey2 ... et al., 2008; Mitchell, 1996; Morse et al., 2009; Spangenberg, 2002; Zahm et al., 2008), on implementation processes (Becker, 2004; Keirstead and Leach, 2008; McAlpine and Birnie, 2006; Velázquez et al ...
2013. Integrating expert knowledge into mapping ecosystem services trade-offs for sustainable for... more 2013. Integrating expert knowledge into mapping ecosystem services trade-offs for sustainable forest management. Ecology and Society 18(3): 34. http://dx.
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Papers by Adrienne Grêt-regamey