水利英语在线翻译。。大虾们帮帮偶。

Luyuli 2024-12-01 01:47:46

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loess plateau ** the world's largest loess area, china and the world ** the most serious soil erosion areas. because of severe soil erosion, causing not only a thousand myriad ditch, bare hill bald ridge topography and poor ecological environment, limiting economic and social sustainable development, but also a lot of sediment d**charged, blockage downstream, the threat of great the safety of the lower yellow river has become a scourge for thousands of years plagued the chinese nation. "yellow damage, root in the sand", and sediment 60% to 70% has come from the loess plateau gully times 1000. therefore, control and sediment control channel becomes the key to solving the problem of the yellow river. practice shows that dam ecological engineering can not only effectively intercept sediment, silting land rec**tion, irrigation development, increase production, but also improve the ecological environment of the yellow river long-term stability, promoting regional economic development and social progress, it ** also because of its comprehensive function of ecological engineering dam only by the local people's genuine support and strong support. however, there ** more than 80% of the ex**ting dam ** the 20th century, before the mass movement in the 70's built, there ** no unified planning, design, flood control standard ** low, "a small brace of water ditch, water dalian dam go," so that loess large dam projects plateau brutally serious damaged. dam severely damaged in th** case, in accordance with the spirit of the then yellow river conservancy committee's request, we began to "the relative stability of the loess plateau ecological engineering dam" in the pilot study. th** study was conducted in the test channel backbone dam, medium, small dam layout, observing its operations, to maximize the development area of dam, in a 100 year frequency flood situation, observing changes in their storage capacity, sedimentation situation, and observing the growth of crops, and to observe different management degree slope, on dam safety to crops and its benefits and so on. proposed dam system to achieve relatively stable, the most basic of the three conditions, namely: first, the relative stability factor must be greater than or equal to a certain allowable value, which ** relatively stable dam system to achieve the key; second, adequate flood protection capacity; third dam system security has not been dangerous. the results of the relative stability of the dam construction to provide a scientific bas** to solve the major **sues of dam severely damaged, so that intercept sediment dam system loess plateau, lan hong storage, increased farmland, the development of irrigation, promote reforestation and improve the ecological environment, adjust land use and industrial structure, flood control, protection of downstream farmland and public facilities as well as increasing people's income and other economic, ecological and social benefits in full play. keywords: relative stability of dam on the loess plateau好长,,,论文摘要一般200字左右吧? 哪有你的那么多呀!! 20210311

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水利英语在线翻译。。大虾们帮帮偶。

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房贷计算器-九子财经 | 备案号：桂ICP备19010581号-1 商务联系企鹅：2790-680461