| 大型水库运行下内蒙古河道泥沙侵蚀淤积过程 |
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| 引用本文： | 王海兵,贾晓鹏.大型水库运行下内蒙古河道泥沙侵蚀淤积过程[J].中国沙漠,2009,29(1):189-192. |
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| 作者姓名： | 王海兵 贾晓鹏 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所,沙漠与沙漠化重点实验室/中国生态系统研究网络临泽内陆河流域研究站,甘肃,兰州,730000 |
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| 基金项目： | 中国科学院"百人计划"项目，国家自然科学基金，中国科学院知识创新重要方向性项目 |
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| 摘 要： | 通过1954—2000年黄河泥沙资料分析,黄河内蒙古河段侵蚀淤积过程对上游水库运行的响应主要表现为:①盐锅峡和三盛公首先将黄河输沙能力由7.33 kg·m-3降为6.27 kg·m-3, 使内蒙古河道由自然淤积状态转变为侵蚀下切状态，小于0.1 mm泥沙侵蚀速率高于大于0.1 mm泥沙淤积速率，河道发生粗化现象；②）刘家峡和青铜峡水库将黄河输沙能力降为3.91 kg·m-3，促使黄河河道中大于0.01 mm泥沙淤积速率大于小于0.01 mm泥沙侵蚀速率，使内蒙古河道发生粗化淤积现象；③龙羊峡水库将黄河输沙能力进一步降为 3.48 kg·m-3,加剧黄河内蒙古河道淤积现象， 大于0.01 mm泥沙和小于0.01 mm泥沙均呈现出淤积状态，淤积速度与黄河上游无水库运作时的自然状态相似。
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| 关 键 词： | 水库 泥沙 侵蚀淤积 内蒙古河道 |
| 收稿时间： | 2008-2-25 |
| 修稿时间： | 2008-6-5 |
Channel Deposition and Erosion Processes of Inner Mongolian Reach of Yellow River following Upstream Reservoirs' Operation |
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| WANG Hai-bing,JIA Xiao-peng.Channel Deposition and Erosion Processes of Inner Mongolian Reach of Yellow River following Upstream Reservoirs' Operation[J].Journal of Desert Research,2009,29(1):189-192. |
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| Authors: | WANG Hai-bing JIA Xiao-peng |
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| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences; Linze Inland River Basin Research Station, CERN, Lanzhou 730000, China |
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| Abstract: | The channel responses of the Inner Mongolian Reach to operation of its upstream reservoirs have different patterns. First, the Yanguoxia and Sanshenggong reservoirs, with their storages of 2.2×108 and 0.5×108 m3, respectively, reduced the sand-transport capacity from 7.33 to 6.27 kg·m-3, thus transforming a naturally net aggradational river channel into one in which erosion rate (<0.01 mm) was more than deposition rate (>0.01 mm). Also, the river channel was degraded and coarsening. Second, the Liujiaxia and Qintongxia reservoirs, with their storages of 57×108 and 5.7×108 m3, respectively, reduced the sand-transport capacity to 3.91 kg·m3. Thus, AS was larger than FS. Such a process may accelerate the alluvial process of the riverbed. Third, the Longyangxia reservoir, with its storage of 247×108 m3, reduced the sand-transport capacity to 3.48 kg·m-3, thus transforming the river channel into one in which both AS and FS may increase. The river channel elevation was as much as that in the pre-reservoir period. |
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| Keywords: | reservoir sediment erosion and deposition processes Inner Mongolian Reach of the Yellow River |
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