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塘背小流域位于全国重点治理八大片之一的兴国县境内,总面积24570亩,其中山地17320亩,耕地3018.2亩;人口密度195人/km~2,人平耕地0.95亩。该小流域属山地丘陵区,山地土壤为风化花岗岩侵蚀土。该区水土流失严重,据统计,水土流失总面积达17299亩,占山地面积的99.9％,其中强度以上流失面积为14268亩,占山地面积的82.4％。长期的水土流失,致使土壤质地松散,缺水缺肥,树木难以生长繁衍,地面上仅有零星矮小的次生马尾松林和散生的禾本科草类,植被覆盖率
Tangtou small watershed is located in Xingguo County, one of the eight key areas for national key management. It has a total area of 24,570 mu, including 17,320 mu of mountainous land and 3018.2 mu of cultivated land. The population density is 195 persons / km 2 and the cultivated land is 0.95 mu. The small watershed is a mountainous hilly area, mountainous soil erosion of weathered granite soil. Soil and water loss is serious in this area. According to statistics, the total area of soil and water loss reaches 17299 mu, accounting for 99.9% of the mountainous area, of which 14268 mu is the loss area above the intensity, accounting for 82.4% of the mountainous area. Long-term soil erosion, resulting in loose soil texture, lack of water and lack of nutrients, difficult to grow and multiply trees, the ground only sporadic secondary Pinus massoniana and scattered grassy grass, vegetation coverage