宁夏清水河扬水灌区灌溉回归水初步分析

为了深入分析宁夏清水河泉眼山水文站年径流量受扬水灌区灌溉回归水的影响程度,以及灌溉回归水与年扬水量、灌溉面积、降水等的密切关系,采用监测断面流量法、年径流量法、年枯季径流量法、水量平衡法等,对不同年份的灌溉回归水量进行了深入分析.通过对比不同方法的计算结果以及合理性分析,确定采用年枯季径流量法比较符合实际.经回归计算法确定出三元回归方程,便于工作中确定各水平年扬水灌区的灌溉回归水量.

Preliminary analysis on the irrigation return flow for Qingshui River Water lifting irrigation district in Ningxia

In order to thoroughly analyze the degree of influence of lifting irrigation on annual water flow yield of Quanyanshan hydrologic station in Ningxia Qingshui river and the close relation between irrigation return flow and annual water flow yield,irrigation area,rainfall,some analysis methods including the monitoring cross section flow,the annual flow measuration,the annual dry season runoff measuration,and the water volume zero-method were used to analyze the irrigation return flow amount of different years.The results showed that the calculating result from annual dry reason runoff measuration is agreed to the fact.Additional,to calculate easily and compare the irrigation return flow amount of different years in lifting water irrigation district,a regression equation was given by using regression calculating method.