长尾河流域侵蚀地貌与水土流失的特征

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长尾河流域侵蚀地貌与水土流失的特征

一、概况长尾河流域位于延河支流杏子河下游的右岸

为杏子河的最大支流。它发源于志丹县杏河公社高原峁附近

由西向东于王窑公社高沟口汇入杏子河。全长32.88公里。海拔由1

093—1

643米。流域面积247.65平方公里

沟谷面积占50.54%。沟谷内土地可利用面积为0.1%。流域中60—80%植被覆盖率占总面积的3.32%

40—60%植被覆盖率占总面积的37.02%

20—40%植被覆

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