论文部分内容阅读
长江是贯穿我国东西的水运大动脉,必须保证其畅通。葛洲坝建成后改变了天然河势,水位抬高、流速减缓。坝区左右航道中的泥沙淤积问题;南津关河段向家咀的回淤问题;库尾臭盐碛汛后的冲沙问题;扇子碛的滩唇发展问题;宜昌港的淤积问题以及长江集水区的水土流失问题等,这些都对长江航运带来不利的影响。为保证航运畅通,(1)大江航道必须与二期工程同时建成;(2)向家咀的整治中以冲沙管道方案较优;(3)臭盐渍走沙时要把坝前水位降低到63米;(4)巴东以上的主要溪沟应修建谷坊,把来石拦阻在沟内。(5)从长远来看,还要植树造林、绿化荒山、进行水土保持措施。
The Yangtze River is a water artery that runs through our country and must ensure its smooth flow. After the completion of the Gezhouba Dam, the natural river regime has been changed. The water level is raised and the flow rate is slowed down. Sediment deposition in the left and right channel of the dam area; back silting to the Xiangjiazui section of the Nanjin River; red mud flushing after the salty discharge of salt moraine in the dam area; beach lip development of the fan moraine; siltation in Yichang Harbor; Water and soil loss problems in catchments, etc., all of which have adverse effects on the shipping of the Yangtze River. In order to ensure the smooth flow of shipping, (1) the large waterway must be completed simultaneously with the second phase of the project; (2) the flushing pipeline scheme should be optimized for the treatment of Jiajiazui; (3) To 63 meters; (4) The main creek ditch above Padang should be built valley, blocking the stone in the ditch. (5) In the long run, afforestation, afforestation and barren hills should also be carried out for soil and water conservation measures.