Analysis on Water and Sediment Variation and the Driving Factors in Yangtze River Basin Since 2000

doi:10.13870/j.cnki.stbcxb.2020.03.016

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Analysis on Water and Sediment Variation and the Driving Factors in Yangtze River Basin Since 2000

更新时间：2024-11-07

- Analysis on Water and Sediment Variation and the Driving Factors in Yangtze River Basin Since 2000
- Vol. 34, Issue 3, Pages: 98-104(2000)
- 作者机构：
  
  1. 长江科学院水土保持研究所,武汉,430010
  2. 水利部山洪地质灾害防治工程技术研究中心,武汉,430010
  3. 三峡大学水利与环境学院,湖北,宜昌,443002
  4. 三峡大学土木与建筑学院,湖北,宜昌,443002
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.03.016
  CLC：
- Published：2000
- 稿件说明：
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Analysis on Water and Sediment Variation and the Driving Factors in Yangtze River Basin Since 2000[J]. 2000, 34(3): 98-104.
DOI：

Analysis on Water and Sediment Variation and the Driving Factors in Yangtze River Basin Since 2000[J]. 2000, 34(3): 98-104. DOI： 10.13870/j.cnki.stbcxb.2020.03.016.

摘要

基于长江干流屏山、朱沱、寸滩、宜昌、汉口、大通6个水文站的实测水沙资料，采用线性回归、Mann-Kendall趋势分析和突变检验、Sen’s估计以及累积距平法，分析长江干流2001—2018年径流输沙年际、年内变化趋势及其成因。结果表明:2000年以来长江干流各水文站年输沙量较2000年前显著降低，降幅高于56%；年径流量下降不明显，降幅低于8%；输沙量变异程度高于径流量变异程度。2001—2018年，长江流域平均月径流量为718×10

，平均月输沙量为1 247×10

t，且主要分布在6—9月。趋势分析显示，年降雨量和径流量变化趋势不明显，年输沙量呈极显著减小趋势，其中屏山、朱沱、寸滩站分别在2010年和2012年左右发生突变，宜昌、汉口、大通站在2005年发生突变；屏山站月径流量无明显变化趋势，大通站1月径流量显著增加，其他4个水文站均在1—4月呈显著增加趋势；各水文站月输沙量主要在6—10月呈显著减少趋势。水利工程和水土保持生态环境建设等人类活动是长江流域输沙减少的主要原因。

Abstract

Based on the measured runoff and sediment data of six hydrologic stations (Pingshan

Zhutuo

Cuntan

Yichang

Hankou and Datong) situated at Yangtze River’s main stream

this study analyzed the inter- and intra- annual variation trends of runoff and sediment during 2001-2018 and their causes using statistical methods including linear regression

Mann-Kendall test

Sen’s estimation and accumulative anomaly. The results showed that since 2000

the annual sediment discharge of each hydrologic station significantly declined compared with that before 2000

with the decreasing amplitude higher than 56%

while annual runoff decreased insignificantly with the decreasing amplitude lower than 8%. The variability of sediment discharge

was higher than that of runoff. For the Yangtze River basin

from 2001 to 2018

the average monthly runoff and sediment discharge was 718×10

and 1 247×10

respectively

and mainly distributed between June and September. The trend analysis indicated that annual precipitation and runoff had no remarkable changes

however

annual sediment discharge showed a significantly decreasing trend. The change-points for Pingshan

Zhutuo and Cuntan station were in 2010 and 2012

and those for Yichang

Hankou

and Datong station were in 2005. Monthly runoff for Pingshan station had no obvious trends; for Datong station

runoff only increased significantly in January

that of the other four stations increased significantly between January and April. Monthly sediment discharge from June to October for the six stations showed significant decreasing trends. In this study

human activities such as water conservancy construction and soil and water conservation were the primary causes of sediment reduction in the Yangtze River basin.

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