| 50年代以来黄河下游河道的萎缩及其原因* |
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| 引用本文： | 陈志清.50年代以来黄河下游河道的萎缩及其原因*[J].地理研究,1995,14(3):74-81. |
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| 作者姓名： | 陈志清 |
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| 作者单位： | 中国科学院、国家计划委员会地理研究所 北京 100101 |
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| 基金项目： | 国家自然科学基金,“八五”攻关基金 |
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| 摘 要： | 根据黄河下游7个控制断面的深泓高程、平均河底高程、滩槽高差及过水断面面积的历年变化,可以看出黄河下游河道的萎缩过程,大型水利工程的运用及引黄灌溉加速了下游河道的淤积和萎缩。
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| 关 键 词： | 黄河下游 河道萎缩 原因 |
| 收稿时间： | 1994-10-01 |
| 修稿时间： | 1995-04-27 |
CHANNEL SHRINK AND ITS CAUSE AT THE LOWER REACHESOF THE YELLOW RIVER SINCE THE1950'S |
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| Chen Zhiqing.CHANNEL SHRINK AND ITS CAUSE AT THE LOWER REACHESOF THE YELLOW RIVER SINCE THE1950''S[J].Geographical Research,1995,14(3):74-81. |
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| Authors: | Chen Zhiqing |
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| Institution: | Institue of Feography, Chinese Academy fo Sciences, Beijing 100101 |
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| Abstract: | Based on the analysk of 7 sections,it is proved that both the thalweg and the mean riverbed of the lower reach Yellow River have been silting and raising since the 1950's.The amplitude of raising is the most at the middle part of the lower reaches.For example,the raising amplitude of thalweg is 0.77m at Huayuankou,0.75m at Jiahetan,3.29m at Guocun,3.69m at Sunkou,2.71m at Luokou' and 1.20m at Lijin,respectively.The reduction in the cross setion under standard water level is very evident.At present,the cross section area is only 40－70% of that in 1950's.The channel shrink of the lower reach Yellow River can be divided into different periods,and it has been accelerated since 1986.The great hydraulic engineerings have greatly changed the distribution of the coming water and sediments of the lower reach Yellow River and brought about marked channel adjustment.The diversion of water from the Yellow River for irrigation reduces water quantity and increases the sediment concentration, and consequently enhances the channel shrink of the lower reach Yellow River. |
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| Keywords: | Lower reaches of the Yellow River Channel shrink Cause |
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