Simulation and Optimization of Furrow Irrigation by the Model SASlS： Sensibility to the Spatial and Temporal Weighted Factors  

作　　者：Roberto Vieira Pordeus Carlos Alberto Vieira de Azevedo Valeria Ingrith Almeida Lima Silvanete Severinoda Silva Vera Ltlcia Antunes de Lima Marcia Rejane de Queiroz Almeida Azevedo 

机构地区：[1]Department of Environmental Science and Technology, Rural Federal University of Semiarid, Mossor, RN 59600-000, Brazil [2]Department of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, PB 58429-170, Brazil [3]Department of Agroecology, University of Paraiba State, Lagoa Seca, PB 58117-000, Brazil

出　　处：《Journal of Environmental Science and Engineering(B)》2012年第4期491-498,共8页环境科学与工程（B）

摘　　要：The surface irrigation systems are the most used not just in Brazil, but in the whole world mainly due to the economy of energy and its operation easiness; however, these systems present low levels of performance, usually, as a consequence of inadequate design and management. Thus, the objective of this research was to develop a tool capable to make possible the simulation and optimization of the continuous flow furrow irrigation performance, making successive simulations of the advance phase and respective prognostics of the performance parameters of the irrigation system. The proposed model is denominated SASIS, ＂Software Applied to Simulation of the Surface Irrigation＂, and had its validation tested for different field conditions. In this paper, the simulation and the optimization of the furrow irrigation by the model SASIS are evaluated regarding to the spatial （4） and temporal （0） weighted factors, which account for the nonlinear variation in the surface and subsurface flow profiles. The analysis of the sensitivity of simulation of the advance phase in the irrigation identified ranges of combinations between spatial and temporal weighted factors of the surface and subsurface flow profiles, resulted in acceptable discrepancies between simulated and measured advance time. Also it was verified that conjugated effect of these weighted factors on the simulation of the advance phase was greater than the effect of the temporal weighted factor. The model presents effective mechanisms in the accomplishment of countless simulations, in a discharge strip understood between the minimum and the maximum allowable values, aiming to determine the relationship between discharge and water application efficiency, deep percolation and runoff rates, and consequently to optimize the performance of the furrow irrigation systems with continuous flow.

关 键 词：Furrow irrigation SIMULATION optimization. 

分 类 号：S275[农业科学—农业水土工程] TB651[农业科学—农业工程]