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首页> 外文会议>International Yellow River Forum on Ecological Civilization and River Ethics >Study on Characters of Water and Sediments and SedimentationRules in the Lower Yellow River during the Last 50 Years
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Study on Characters of Water and Sediments and SedimentationRules in the Lower Yellow River during the Last 50 Years

机译：过去50年来，下黄河水和沉积物与沉积规则的研究

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Taking monthly runoff and sediments series measured at Huayuankou and Lijin hydrologic stations of the 54 years (1950~2003) as the basic series data, and by using wavelet analysis ( WA) method, the multi — temporal scale variation characters and relation between water and sediments in the lower Yellow River during the last 50 years have been identified. Analyzing results show that due to the whole variation trends of runoff and sediments ( runoff decreasing, sediments reducing, incoming sediment coefficient increasing and sediment transporting capacity decreasing along with year, etc. ) , the sedimentation before 1986 is increasing slowly but decreasing after 1986. Since the runoff shows obvious downward trend after 1986 , the erosion ability of runoff is decreasing along with year, which makes the sediment erosion — accumulation processes change into single sediment accumulation process, and causes the relation of water and sediments become much worse. Furthermore , increasing runoff is the basic way to improve the relation of water and sediments and to reduce sedimentation in the lower Yellow River.
机译：在54岁（1950〜2003）作为基本系列数据的华福和李金水文站以每月径流和沉积物系列测量，并通过使用小波分析（WA）方法，多时间刻度变化特征和水之间的关系在过去50年期间，较低的黄河中的沉积物已经确定。分析结果表明，由于径流和沉积物的整个变化趋势（径流减少，沉淀物减少，来沙系数增加，输沙能力与年一起下降等），1986年之前的沉淀是缓慢增加，但1986年之后开始减少。自1986年后径流显示明显的下降趋势，径流的侵蚀能力随着年份的降低，这使得沉积物腐蚀 - 积累过程变为单沉积物积累过程，并导致水和沉积物的关系变得更加差。此外，增加径流是改善水和沉积物关系的基​​本方法，并减少下黄河中的沉降。

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