滴灌灌水小区优化设计的浅论及算例

Discussion and numerical examples of optimization design of drip irrigation district

滴灌工程建设规范规定,一条支管所控制的灌溉面积称为一个灌水小区,它是滴灌系统最基本的设计单元,在支管管径选择及压力均衡的验算方面起到十分重要的规范作用。为了满足系统各灌水小区压力均衡,在各支管入口设置压力调节阀,消除其余管线要求水头与水源设计水头之差,达到系统压力均衡,使系统流量偏率不大于20%。

Drip irrigation project construction standard stipulates that the irrigation area controlled by one small branch pipe is called one small irrigation district. It is the most basic design unit in drip irrigation system design,which plays very important specification role in the aspects of branch pipe diameter selection and pressure balance calculation. Pressure regulation valves are set on inlets of all branch pipes in order to meet pressure balance of all small irrigation districts of the system. Eliminating other pipelines requires the difference between water head and water source designed water head reaching pressure balance of the system,so that system flow capacity deviation cannot be larger than 20%.