STATISTICAL RELATIONS BETWEEN GEOMORPHIC PARAMETERS——A CASE STUDY OF THE YUNNAN REACH OF THE LANCANGJIANG RIVER IN SOUTHWESTERN CHINA

Suiji WANG; Shaohong WU; Erfu DAI

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STATISTICAL RELATIONS BETWEEN GEOMORPHIC PARAMETERS——A CASE STUDY OF THE YUNNAN REACH OF THE LANCANGJIANG RIVER IN SOUTHWESTERN CHINA

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摘要

The properties of rivers and their catchments can be expressed by statistical relationships between geomorphic parameters. These statistical relationships may reveal some inherent differences in geomorphic evolution for different reaches or different order tributaries of a river basin. A case study was undertaken of the Yunnan reach of the Langcangjiang River. The catchment area, channel length and gradient of the first-, second- and third-order tributaries all with catchment areas larger than 100 km2 in the Yunnan reach were the main geomorphic parameters evaluated. The correlation between catchment area and channel length as well as between catchment area and channel gradient with respect to the total tributaries, different reach tributaries, and different order tributaries were revealed using statistical methods. In general, the channel length as a function of catchment area, was best expressed by a quadratic function where channel length increases with increasing catchment area (half parabola), while the channel gradient as a function of catchment area is best expressed by an exponential decay function. Comparison of the best-fit formulas revealed the following phenomena: the lower Yunnan reach tributaries and the first-order tributaries have a dominant effect on geomorphic parameters of the total tributaries. In addition, the statistical relationships indicate that the river geomorphic system in the upper and lower Yunnan reaches evolved differently. This study method used to differentiate river characteristics by determining statistical relationships between geomorphic parameters may be extended to other rivers and their catchments.

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《国际泥沙研究：英文版》 |2007年第2期|131-141|共11页
作者
Suiji WANG; Shaohong WU; Erfu DAI;
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作者单位

Assoc.;

Prof.;

Key Laboratory of Water Cycle and Related Land Surface Processes;

Institute of Geographical Sciences and Natural Resources Research;

Chinese Academy of Sciences;

Beijing;

100101;

China;

Prof.;

Key Laboratory of Water Cycle and Related Land Surface Processes;

Institute of Geographical Sciences and Natural Resources Research;

Chinese Academy of Sciences;

Beijing;

100101;

China;

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原文格式 PDF
正文语种 chi
中图分类 P344.2;
关键词
澜仓江流域; 云南; 地貌参数; 相关性; 河流集水;

机译：河流域;地貌参数;相关;河流特征;

STATISTICAL RELATIONS BETWEEN GEOMORPHIC PARAMETERS——A CASE STUDY OF THE YUNNAN REACH OF THE LANCANGJIANG RIVER IN SOUTHWESTERN CHINA

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