一种计算蒸发条件下农田排水的新方法

A New Method of Calculation of Farmland Drainage in Evaporation Conditions

本文分析了排水地段的地下水位在蒸发及排水双重作用下的回降速度规律,提出一种适用于蒸发指数为任意值的农田排水沟(管)间距的计算方法。根据排水地段试验所得的地下水位变化的实测资料,用该法可求得适于该地区排水计算的有关参数值。

This paper analyses the laws of drawdown velocity of subsurface water level in the drainage area under the double actions of evaporation and drainage, and then suggests a calculation method of the distance between drainage ditches in farmland applicable to any index of evaporation. Based on the field measured data of variations in subsurface water level in the drainage area, the method can be used to obtain the values of some related parameters for drainage calculation applicable to that area.