Different positions in gully area have different phenomena of erosion and sediment yield, and even represent disparate patterns of water and sediment processes in different watershed scales.
沟壑区的不同部位具有不同的侵蚀产沙现象，并在不同的空间尺度上表现出迥异的水沙运动规律。为此需将流域分为坡面与沟道两大系统分别研究。
Results show that sediment yield decrease slightly but runoff yield increase obviously of Jinghe watershed nearly 50 years;
结果表明：泾河流域近50年来的输沙量略有下降，而径流量减少比较显著；
The trend of runoff and sediment yield in the Jihe watershed declined evidently first and then remained steady during the research period.
径流与泥沙在多年变化中均呈先下降后平缓趋势。
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