黄河三角洲造陆过程中的陆域水沙临界条件研究
A study of thresholds of runoff and sediment for the land accretion of the Yellow River Delta
查看参考文献11篇
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文摘
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黄河三角洲发育是河口区河流动力及陆域物质通量与海洋动力及海域物质通量相互作用的产物，三角洲造陆速率取决于上述两方面的对比关系。当上述两方面处于平衡时，三角洲造陆处于临界状态，即净造陆速率为零，与之相联系的入海泥沙量和径流量可视为黄河三角洲造陆过程的临界水沙条件。动用经验统计方法估算出：当入海年沙量Q_s为2.78亿t/a、入海年水量Q_w为76.7亿m~3时，或者当关系式3.1934Q_s + 0.0856Q_w = 17.94得到满足时，黄河三角洲造陆过程处于临界平衡状态。在黄河流域的环境管理中，应将上述两项临界值作为约束条件。黄河流域生态用水量的内涵应予以扩展，维持三角洲造陆平衡所必须的入海径流量，应作为黄河流域的生态用水量。 |
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其他语种文摘
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The Yellow River is the most famous heavily sediment-laden river of the world, its land accretion process is sensitive to influencing factors such as the changing precipitation and human activities. Thus, the Yellow River Delta provides an ideal site to study the delta development under the land-ocean interactions. The development of Yellow River Delta can be regarded as the outcome of interactions between the river and marine dynamics and of interactions between the river- and tide-transported material fluxes. The rate of land accretion is controlled by these interactions. When the above two aspects are in equilibrium, the land accretion process of delta may be thought under the critical conditions, and the river-supplied water and sediment quantities may be considered as thresholds of runoff and sediment for land accretion. By comparison between the sea charts and remotely sensed images made in different periods, the annual area of land accretion has been obtained. To identify the water and sediment thresholds for delta development, two regression equations have been established between land accretion rate and water and sediment quantities into the river mouth, based on the data from the Yellow River Delta in the period of 1955-1989. From these relationships, the threshold of river-supplied sediment quantity for land accretion has been estimated as 2.78 10~8t, and the threshold of runoff as 76.7 10~8m~3; under these sediment and water supplies, the Yellow River Delta may be in equilibrium in an average sense. In other words, if the annual sediment quantity is less than 2.78 10~8t, and the annual runoff less than 76.7 10~8m~3, the delta might be eroded and the land would be lost, and thus the environmental security of the delta might be seriously affected. For a better management of the environment of the Yellow River, these thresholds should be taken as one of the constraints. The meaning of ecologically needed water use in the Yellow River should be extended, in order to include the water quantity that is required for maintaining the balance of land accretion in the delta. |
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来源
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地理研究
,2002,21(2):163-170 【核心库】
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关键词
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三角洲
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造陆过程
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临界条件
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黄河
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地址
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中国科学院地理科学与资源研究所, 北京, 100101
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语种
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中文 |
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ISSN
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1000-0585 |
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学科
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自然地理学 |
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基金
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国家973计划
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:965861
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参考文献 共
11
共1页
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1.
钱宁. 黄河中游粗泥沙来源区对黄河下游泥沙冲淤的影响.
第一次河流泥沙国际学术讨论会论文集,1980:53-62
|
CSCD被引
30
次
|
|
|
|
|
2.
李栓科. 近代黄河三角洲的沉积特征.
地理研究,1989,8(4):45-55
|
CSCD被引
12
次
|
|
|
|
|
3.
叶青超.
黄河流域环境演变与水沙运行规律研究,1994:108-115
|
CSCD被引
3
次
|
|
|
|
|
4.
尹国康. 冲积扇—三角洲系统自组织行为与治理对策：以黄河下游及其河口地区为例.
地理研究,2000,19(1):45-52
|
CSCD被引
1
次
|
|
|
|
|
5.
王玲. 黄河下游断流成因分析.
人民黄河,1997(10):13-17
|
CSCD被引
12
次
|
|
|
|
|
6.
许炯心. 人为季节性河流的初步研究.
地理研究,2001,20(3):257-265
|
CSCD被引
1
次
|
|
|
|
|
7.
刘苏峡. 黄河流域水循环研究的进展和展望.
地理研究,2000,19(3):234-242
|
CSCD被引
1
次
|
|
|
|
|
8.
范兆木.
黄河三角洲沿岸遥感动态分析图集,1992
|
CSCD被引
15
次
|
|
|
|
|
9.
曾庆华.
黄河口演变规律及整治,1998
|
CSCD被引
14
次
|
|
|
|
|
10.
钱意颖.
黄河干流水沙变化与河床演变,1993:160-200
|
CSCD被引
9
次
|
|
|
|
|
11.
钱宁. 钱塘江河口沙坎的近代过程.
地理学报,1964,30(2):124-142
|
CSCD被引
21
次
|
|
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