论文部分内容阅读
翻开地图一看,黄河、长江同出一源,仅一山之隔,长江上游通天河距黄河扎陵湖源头直线不过八十公里。黄河发生断流,据悉是七十年代以后的事。黄河为何如此伤心,欲哭无泪呢?我看,这个问题主要是由于破坏了生态平衡,唇亡则齿寒,毛之不存,皮肉焉安。森林、草原是水土保持的屏障。查看黄河沿岸的甘肃、陕西、宁夏、山西这几省区的黄土流失最严重的地段就可见一斑。黄土高原植被不保,使黄河含沙量成了世界之最。
Open map to see a look, the Yellow River, the Yangtze River with a source, only across the mountain, the upper reaches of the Yangtze River from the Yellow River Zhalong Lake source straight line, but eighty kilometers. The Yellow River cut off, it is reported that after the seventies thing. Why is the Yellow River so sad, crying? I think, this problem is mainly due to the destruction of the ecological balance, lips are cold teeth, hair does not exist, skin Yan Yan. Forest, grassland is a water and soil conservation barrier. It can be seen from the most loess section of the Gansu, Shaanxi, Ningxia and Shanxi provinces along the Yellow River. Vegetation in the Loess Plateau does not guarantee that the Yellow River sediment has become the world’s most.