Evolution Characteristics and Impacting Factors of Annual Runoff and Sediment in Lishui River During 1955-2009

LIU Bi-wei; SONG Nan; GENG Sheng-hui; CHEN Xi

doi:10.13961/j.cnki.stbctb.2014.06.069

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Evolution Characteristics and Impacting Factors of Annual Runoff and Sediment in Lishui River During 1955-2009

- Evolution Characteristics and Impacting Factors of Annual Runoff and Sediment in Lishui River During 1955-2009
- Bulletin of Soiland Water Conservation Vol. 33, Issue 6, Pages: 360-363(2014)
- 作者机构：
  
  1. 湖南省水利水电勘测设计研究总院,湖南,长沙,410007
  2. 湖南省水利水电职业技术学院,湖南,长沙,410131
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.06.069
  CLC：
- Published：2014
- 稿件说明：
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LIU Bi-wei, SONG Nan, GENG Sheng-hui, et al. Evolution Characteristics and Impacting Factors of Annual Runoff and Sediment in Lishui River During 1955-2009[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 360-363.
DOI：

LIU Bi-wei, SONG Nan, GENG Sheng-hui, et al. Evolution Characteristics and Impacting Factors of Annual Runoff and Sediment in Lishui River During 1955-2009[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 360-363. DOI： 10.13961/j.cnki.stbctb.2014.06.069.

摘要

为了掌握澧水长时间序列的径流泥沙演变规律

运用Pearson相关系数法分析了1955-2009年澧水年径流量和年输沙量。结果表明:近55 a来澧水年径流量没有发生明显变化

而年输沙量呈显著下降趋势

并在1983年发生了突变。通过分析降雨、径流及输沙量之间的变化关系可知

在1955-2009年澧水年降水量无明显变化的情况下

人为因素是年输沙量显著减少的主要因素

水土保持综合治理和水利工程拦沙导致澧水进入洞庭湖的泥沙量每年相应减少约4.59×10

t。

Abstract

Using the Pearson correlation coefficient method

annual runoff and sediment were analyzed in order to find out the evolution characteristics and its impacting factors in the Lishui River during 1955-2009. The results showed that the annual runoff had no obvious change during this period

while the annual sediment transportation appeared significant decline trend

and had sudden change in the year of 1983. The relationship between precipitation

runoff and sediment transportation variation were analyzed

it turned out that human activities were the main reason causing the sediment transportation descent when the annual precipitation has no obvious change during 1955 to 2009. Thus

the sediment from the Lishui River to the Dongting Lake decreased by 4.59×106 t every year accordingly.

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