terms measure how close an irrigation event is to an ideal one. An ideal or a reference irrigatio... more terms measure how close an irrigation event is to an ideal one. An ideal or a reference irrigation is one that can apply the right amount of water over the entire region of interest (subject region) without loss. The key phrase, used in the description of a reference irrigation, has been used as the criterion for identifying the performance terms that constitute a complete set, corresponding to any given irrigation regime. Indices have been defined to quantify the performance terms. The interrelationship between performance indices as well as the relationship between each index and the system variables have been explored. The repercussions of those observations on system design and management have been discussed. 0 1997 Elsevier Science B.V.
A complete set of dependent furrow irrigation variables has been identified, for which empirical ... more A complete set of dependent furrow irrigation variables has been identified, for which empirical functions, of general applicability, have been developed. A one-dimensional sensitivity analysis technique coupled with dimensional analysis was employed to reduce the number of independent irrigation variables to a manageable size. Simulation experiments were carried out to generate the data used in developing the pertinent functional relationships. Regression analysis was used to ascertain the specific form of the equations. The predictive quality of the functions has been assessed by comparing their output with those of a zero-inertia model, and was found to be satisfactory.
Significant advances have been made in the areas of mathematical modelling of surface irrigation ... more Significant advances have been made in the areas of mathematical modelling of surface irrigation processes; nevertheless, their impact on system design and management remains minimal. The main reasons for this are complexity, cost, and the level-of-expertise requirement of the existing models. Empirical functions of the type presented in a companion paper can help overcome these problems. This paper describes the use of those functions in the conventional design and management of furrow irrigation systems.
terms measure how close an irrigation event is to an ideal one. An ideal or a reference irrigatio... more terms measure how close an irrigation event is to an ideal one. An ideal or a reference irrigation is one that can apply the right amount of water over the entire region of interest (subject region) without loss. The key phrase, used in the description of a reference irrigation, has been used as the criterion for identifying the performance terms that constitute a complete set, corresponding to any given irrigation regime. Indices have been defined to quantify the performance terms. The interrelationship between performance indices as well as the relationship between each index and the system variables have been explored. The repercussions of those observations on system design and management have been discussed. 0 1997 Elsevier Science B.V.
A complete set of dependent furrow irrigation variables has been identified, for which empirical ... more A complete set of dependent furrow irrigation variables has been identified, for which empirical functions, of general applicability, have been developed. A one-dimensional sensitivity analysis technique coupled with dimensional analysis was employed to reduce the number of independent irrigation variables to a manageable size. Simulation experiments were carried out to generate the data used in developing the pertinent functional relationships. Regression analysis was used to ascertain the specific form of the equations. The predictive quality of the functions has been assessed by comparing their output with those of a zero-inertia model, and was found to be satisfactory.
Significant advances have been made in the areas of mathematical modelling of surface irrigation ... more Significant advances have been made in the areas of mathematical modelling of surface irrigation processes; nevertheless, their impact on system design and management remains minimal. The main reasons for this are complexity, cost, and the level-of-expertise requirement of the existing models. Empirical functions of the type presented in a companion paper can help overcome these problems. This paper describes the use of those functions in the conventional design and management of furrow irrigation systems.
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