annual mean runoff coefficient 多年平均径流系数
Annual precipitation had significant effects on the annual runoff coefficient.
年降水量对年径流系数的影响极显著。
Before 1980, no trend could be seen, but after 1980, the annual runoff coefficient tended to decrease.
年径流系数的变化和年径流量的变化相似，1980年以前无趋势性变化，1980年后有减小的趋势。
For forest watershed and shrub watershed, the annual mean runoff coefficient was affected by mean annual precipitation, mean annual evapotranspiration and mean slope grade.
对于森林流域和灌木流域，其多年平均径流系数主要受多年平均降水量、多年平均蒸散量和平均坡度共同影响；
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