runoff coefficient

Adopting moving average method and serial cluster analysis method, hydrological series in the basin was divided into three phases according to annual runoff coefficient variation.

采用滑动平均和有序聚类分析方法，对选定的水文序列进行阶段划分，并统计分析各阶段降水、径流的变化特性；

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Dividing out four drainage basins, and on the basis of the achievement of three water changes, applying runoff coefficient formula from ShanDong water conservancy's academy and USLE, respectively counting and assessment in average surface runoff average supply to groundwater and average soil erosion;

划分出四个小流域，根据三水转化研究成果，采用山东省水科院变径流系数经验公式法和美国通用水土流失方程，分别对该地多年平均地表径流、地下水补给和水土流失进行计算评价；

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In this paper, it is assumed that the monthly evaporation coefficient has the same function format with the annual evaporation coefficient. Based on this assumption, a kind of TANK Model is designed to simulate the monthly runoff processes for mountainous region of Heihe Mainstream River.

在假设月蒸发系数和年蒸发系数具有相同函数表达式的基础上，对黑河干流地区设计了TANK流域水文模型。

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Moreover discharge runoff coefficient and pluviometric runoff coefficient are analyzed, the both can be used for evaluating the effect of rainwater utilization.

另外分析了流量径流系数和雨量径流系数，并提出利用径流系数实现对雨水利用工程效果的评估。

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Comparison of runoff coefficient of watersheds with different landscape structure in Heishui River basin of Minjiang River upper reach

岷江上游黑水河流域不同景观结构小流域径流系数的比较

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Compared with bare soil ( ck), planting Bahia grass on level bench terrace wall was the most effective method to conserve soil and water, it reduced average runoff coefficient by 85.19% and amount of soil erosion by 98.85%. Others also had various effects.

与全园裸露（对照）比较，水平梯田梯壁植草水土保持效果最佳，其平均径流系数减少85.19%，土壤侵蚀量减少98.85%，其他各处理也有不同程度防治水土流失的效果。

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