摘要
在有限供水条件下,为了使全灌区增产净效益达到最大。研究依据非充分灌溉中的调亏灌溉原理和作物的水分生产函数,推导出作物产量与土壤含水率之间的函数关系,并建立了全灌区某次供水增产净效益最大的优化配水模型。根据RS技术能够快速获取信息的特点,以陕西关中冯家山水库北干十一支灌区为例,用RS技术获取灌区土壤含水率情况,再用GIS计算出不同作物灌溉需水量数据,并根据来水量用Matlab计算软件对模型进行求解,可快速获得各斗渠优化配水量。模型在求解时不受灌区类型的限制,因此,模型具有较强的通用性、可操作性和推广性。
An optimal water allocation model is built to solve how to obtain the maximum increasing net profit in the irrigation area with the limited water supply,on the basis of deficit irrigation principle and crop water production function.It takes 11th branch of North main channel in Fengjiashan irrigation region as an example to build the optimal water allocation model with RS technology to obtain the soil water content and GIS to acquire the data of crop water requirements respectively under different irrigation quota.The model solution is by the use of Matlab software according to the water inputs in the lateral canal,thus to attain the optimal water allocation amount for different crops in different lateral canal.Owing to no restriction for special irrigation area during the process of model solution,therefore,this model can be widely used and popularized in any irrigation districts.
出处
《灌溉排水学报》
CSCD
北大核心
2010年第5期126-130,134,共6页
Journal of Irrigation and Drainage
基金
国家"十一五"科技支撑计划项目(2006BAD11B05
2007BAD88b05)
关键词
RS
GIS
增产净效益
优化配水
RS
GIS
increasing net profit
optimization of water allocation
