论文部分内容阅读
连云港市山丘区占全市总面积三分之一,其中85％以上为Ⅱ、Ⅲ、Ⅳ级流失区,年侵蚀模数为4353吨/平方公里。较为严重的水土流失,导致了土层浅薄,肥力下降,耕地沙化,河床抬高,库塘淤积,生态环境恶化,人民生活困难。为了改变山丘区地贫人穷的面貌,在各级党政、淮委和省水利厅等主管部门大力支持下,从1983年起,连云港市把山丘区水利建设的重点转移到以小流域为单元进行综合治理、连续治理、坚持治理与开发相结合的治理上来。至今共治理13条小流域,计126平方公里,基本上消除了Ⅲ、Ⅳ级流失区,年侵蚀模数减少到1238吨/平方公里,削减了
The hills in Lianyungang City account for one third of the total area of the city, of which 85% are Grade II, III and IV drainage areas with an annual erosion modulus of 4353 tons / km 2. The more serious soil erosion led to shallow soil, decreased fertility, desertification of cultivated land, elevation of riverbed, siltation of ponds, deterioration of ecological environment and difficulties in people’s life. In order to change the face of poor people in the hills and poor areas, under the strong support of the party, government and provincial water resources department at all levels and other competent departments, starting from 1983, Lianyungang City, the focus of the hill area water conservancy construction to small Watershed as a unit for comprehensive management, continuous management, adhere to the combination of governance and development of governance. To date, a total of 13 small watersheds have been managed, accounting for 126 square kilometers, basically eliminating Grade III and IV drainage areas and reducing the annual erosion modulus to 1238 tons per square kilometer