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The effects of soil and water conservation on surface runoff process in small watersheds of the Qinba mountainous region are analyzed by the parallel observation in two comparable watersheds.
采用小流域平行对比法，分析秦巴山区小流域的次降雨洪水过程，研究了水土保持综合治理对小流域洪水的作用过程。
In the mountainous watershed of the Heihe River, the runoff coefficient is much larger than that of the whole arid area, but it is still less than the average value over the whole country.
黑河山区流域径流系数远比干旱内流区的平均值大，但要小于全国的平均径流系数。
The results show that the surface runoff mainly are formed in the middle and the high mountainous area in the inland arid areas and dissipate in the pediment plain and desert.
结果表明，内陆干旱地区的地表径流主要形成于中、高山区，散失于山前平原和沙漠。
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