摘要
窟野河、孤山川、秃尾河三流域,是黄河中游多沙粗沙区的核心部分。三条河自1953年有观测资料以来,平均每年输入黄河的泥沙量为1.65亿t,其中粗沙量为0.89亿t。三条河各站1970年以来输沙量均为减少,其主要原因并非水土保持发挥了作用,而是由于降雨总量和降雨强度减少所致。神府煤田开发,至公元2000年平均每年将增加入黄泥沙量450万t。随着全球的增温,流域内的降雨量将会增加,植被的生境条件将得到改善,侵蚀产沙强度会随之减弱。但是,由于人口的增加,土地利用结构与垦殖指数都不会有明显的变化,所以流域的产沙不可能有大幅度的减少。
River basins of Kuyehe, Gushanchuan and Tuweihe rivers are the core parts of the source area of coarse sediment in the Middle Yellow River. Since 1953, the recorded average annual sediment load entering the Yellow River was 165 million tons in which coarse sediment was 89 million tons. Since 1970, sediment load from the three rivers decreased, it was not soil conservation work but the decrease of total rainfall and intensity of rainfall that played important roles. It is estimated that the average annual sediment load entering the Yellow River will increase by 4. 5 million tons due to the development of Shen-Fu coal mine by the year of 2000. With an increase of temprature of the whole globe, the rainfall of the three rivers will increase, the growth condition of vegetation will be improved and the intensity of soil erosion will be weakened. But the land use structure and reclamation index will not vary obviously with an increase of population, therefore, the sediment load from the river basins will not decrease greatly.
出处
《中国水土保持》
北大核心
1993年第2期24-25,49,共3页
Soil and Water Conservation in China
关键词
窟野河
孤山川
秃尾河
入黄泥沙变化
variation of sediment entering the Yellow River influence of the development of the coal mine influence of the variation of climate Kuyehe River Gushanchuan River Tuwei-he River
