论述了宁都县侵蚀区不同岩性水土流失现状和危害，并对成因及发展趋势进行了分析。
The author expounded the situation and harms of different rocky water and soil losses in Ningdu county eroded area.
安山小流域属低山丘陵中度侵蚀区，水土流失严重。
Anshan basin is low mountains middle erode area, the soil eroded very serious.
水土流失，其实是一种主要的侵蚀地貌演化过程。
Water and soil loss is an important physiognomy evolution course.
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