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中阳县属晋西黄土丘陵区,山高坡陡,沟壑纵横,地形破碎,植被稀少,十年九旱,水土流失严重。据交口水保站资料,多年平均洪水模数为17500立方米/平方公里,输沙模数为3205吨/平方公里。分析测定,一吨泥沙中含氮0.3205公斤,磷
Zhongyang County is a loess hilly region in western Shanxi Province. There are steep mountain slopes, vertical and horizontal ravines, fragmented terrain and scarce vegetation. According to the intersection of water and soil protection station information, the average annual flood module is 17500 cubic meters / square kilometer, the sediment transport module is 3205 tons / square kilometer. Analytical determination, a ton of silt containing 0.3205 kilograms of nitrogen, phosphorus