有效持水量 meaning in English

effective water-holding capacity
usable capacity

Effective moisture of base material mixture is one of the important indices evaluating thick layer base material spraying bio - slope engineering
摘要基材混合物的有效持水量是评价厚层基材喷射植被护坡效果的重要指标之一。
On the base of the palmer drought severity model of america and the modificated palmer drought severity model ( 1986 ) , we further modificate the palmer drought severity model in the following aspects ; ? 4 stations were chosen to develope the model and adjust the weighting factor ; ? he potential evapotranspiration for an each month was computed by the penman - monteith equation commended by fao ; ( 3 ) the getting of available water capacity of the soil ( awc ) in each station was based on the data of awc that we can find and the characteristic of soil in each station
在美国帕默尔旱度模式和我国1985年修正的帕默尔旱度模式的基础上，针对其中存在的问题，从建模选用较多站点、可能蒸散计算采用彭曼?蒙特斯公式和土壤田间有效持水量进一步准确划分等三个方面进一步修正了帕默尔旱度模式。