论文部分内容阅读
退田还湖,到2010年,洞庭湖的水面将恢复到新中国成立以前的4350平方千米。根治水患治理洞庭湖迫在眉睫洞庭湖区是全国重要的商品粮、棉基地。但长期以来,由于经济发展中没有处理好人与自然的关系,致使长江中上游、四水流域水土流失严重,湖区泥沙大量淤积,湖面面积从1825年的6000平方千米萎缩到新中国成立以前的4350平方千米。截至1995年,洞庭湖的水面面积已下降至2625千米。
Returning the land to the lake, by 2010, the water surface of Dongting Lake will return to 4350 square kilometers before the founding of New China. Curing flood management Dongting Lake imminent The Dongting Lake area is an important commodity grain and cotton base in the country. But for a long time, due to the fact that the relationship between man and nature has not been dealt with in the economic development, the water loss and soil erosion in the upper and middle reaches of the Yangtze River and in the four watersheds has been severe. The silt deposits in the lake area have been extensive. The lake area has shrunk from 6,000 square kilometers in 1825 to the establishment of new China. 4350 square kilometers. As of 1995, the water surface area of Dongting Lake has dropped to 2,625 km.