青海省巴音河流域节水前后灌溉回归水计算

为了解巴音河流域灌区工程节水措施对灌溉回归水的影响程度以及灌溉回归水与灌溉总水量、灌溉面积等的关系,并了解滴灌比例对灌溉回归水的影响程度,对不同年份的灌溉回归水量进行了计算分析,计算出2011年和2014年巴音河流域灌区灌溉回归水量分别为6170.2万m3和3736万m3。根据2011年和2014年这两个不同年份的灌溉回归水量,将滴灌和漫灌两种造成回归水量变化的灌溉方式考虑在内,确定出灌溉回归水量方程式。

Statistics of irrigation return water before and after water saving in Bayin River Basin in Qinghai Province

In order to understand the influential degree of engineering water-saving measures on irrigation return water and the relationships among irrigation return water, irrigation total water and irrigation area and look into the influential degree of drip irrigation ratio on the irrigation return flows, the irrigation return water of different years is calculated and analyzed, figuring out that the irrigation return flow in Bayin River basin in 2011 and 2014 are 61. 702 million m³ and 37. 36 million m³, respectively. Taking different irrigation methods of drip irrigation and flood irrigation which may cause the variety in irrigation return flow into consideration, the equations to calculate the irrigation return flow are determined, according to the amount of irrigation return flow in 2011 and 2014.