The Study of Computing Methods for True Quantity of Water Saving on Outlet Combining Wells Irrigation Area

The study for irrigation water saving have converted from traditional to true water saving quantity by foreign and national Scholars.This paper,at first,analyzes the based concept of true water saving quantity and the calculating method.And on this basis,the paper suggests that true water saving quantity for the irrigation area of outlet combining wells is composed of direct quantity of water saving,indirect quantity of water saving and seize diving evaporation and so on.Then,the author calculates the true water saving quantity and the sensitivity of parameters for You-lian irrigation area in intermedinate of Hei he.At last,the paper analyzes the saving effect of various measures,the applicable conditions of this method and the existed problems.