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1 流域概况 大田庄流域位于费县西北部,总面积77.03km~2,山势陡峭,高低不平。多年平均降水量864mm,主要集中在6～8月份。治理前,流域内共有林地4933.3hm~2,林草覆盖率为64.4％。除部分国营林场外,大多数为残次幼林,郁闭程度低。加上坡耕地分布很广、耕作不当,水土流失十分严重,流失面积达68.52km~2,侵蚀模数为2418.5t/km~2·a。1992年,国家淮委投资进行水土保持综合治理,流域人民以此为契机,开展了大规模的整山治水活动。经过
1 Basin Overview Datianzhuang Basin is located in the northwestern Fei County, with a total area of 77.03km ~ 2, the steep, rugged. The average annual rainfall of 864mm, mainly concentrated in 6 ~ August. Before the management, a total of 4933.3 hm ~ 2 woodland was found in the basin and the coverage rate of forest and grass was 64.4%. With the exception of some state-owned forest farms, the majority are young and old, with low degree of canopy closure. In addition, the slope farmland is widely distributed and cultivated improperly. The soil erosion is very serious with the loss area of 68.52km ~ 2 and the erosion modulus of 2418.5t / km ~ 2 · a. In 1992, the State Huaai Investment for comprehensive management of soil and water conservation, basin people took this as an opportunity to carry out large-scale mountain water control activities. after