寿宁县九岭溪小流域 ,位于斜滩溪上游的芹洋乡境内 ,地形以旗山为主峰 ,向东西两侧延伸形成低山高丘陵区 ,海拔 35 0～ 5 0 0 m,是个严重的水土流失区。“山头光 ,溪水黄 ,满目疮痍一片荒”,这就是当地水土流失的萧刹情景。严重的水土流失导致旱涝灾害频繁 ,制约了当地经济的发 The small watershed of Jiuling Creek in Shouning County is located in Qinyang Township, upstream of Xietan Creek. The topography is mainly of Qishan, extending to both sides of the east and west to form a hilly area with an elevation of 35 0-500 m. It is a serious soil and water Lost area “Hill light, yellow water, devastating”, this is the local water and soil erosion Xia scene. Severe soil erosion lead to frequent droughts and floods, restricting the development of the local economy