Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation
Taking the upper reaches of the Liuchong River in Guizhou Province as the study area,this paper first analyzes the trend and abrupt change of the annual runoff at Qixingguan Station in the Liuchong River by the Mann-Kendall test and Pettitt test to find the abrupt change points,then,discusses the re...
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Editorial Office of Pearl River
2021-01-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.10.005 |
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| author | LONG Da DONG Qianjin YANG Rongfang |
| author_facet | LONG Da DONG Qianjin YANG Rongfang |
| author_sort | LONG Da |
| collection | DOAJ |
| description | Taking the upper reaches of the Liuchong River in Guizhou Province as the study area,this paper first analyzes the trend and abrupt change of the annual runoff at Qixingguan Station in the Liuchong River by the Mann-Kendall test and Pettitt test to find the abrupt change points,then,discusses the reasons of runoff change before and after the abrupt change points by the coupled water-energy balance equation,finally,calculates the contribution rates of precipitation,potential evapotranspiration and underlying surface to runoff change through the sensitivity analysis of their elastic coefficients.The results show that:The depth of runoff in the upper reaches of the Liuchong River shows a significant downward trend from 1971 to 2009,and a significant abrupt change occurred in 1986.By comparing the sensitivity of precipitation,potential evapotranspiration,and underlying surface to runoff change,it is found that the elastic coefficient of precipitation is the highest,followed by the underlying surface index,and finally the potential evapotranspiration,indicating that runoff is the most sensitive to the change of precipitation.In addition,based on the results of the contribution rate of the three factors to the reduction of runoff,it is found that the contribution rate of decreasing precipitation to runoff reduction is as high as 113.3%,followed by the change of underlying surface,with a contribution rate of 14.4% and finally the increasing potential evapotranspiration,with a contribution rate of -27.7%. |
| format | Article |
| id | doaj-art-628b93d4c5ae498ba76b602d519e1b7b |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2021-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-628b93d4c5ae498ba76b602d519e1b7b2025-01-15T02:28:12ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352021-01-014247646419Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance EquationLONG DaDONG QianjinYANG RongfangTaking the upper reaches of the Liuchong River in Guizhou Province as the study area,this paper first analyzes the trend and abrupt change of the annual runoff at Qixingguan Station in the Liuchong River by the Mann-Kendall test and Pettitt test to find the abrupt change points,then,discusses the reasons of runoff change before and after the abrupt change points by the coupled water-energy balance equation,finally,calculates the contribution rates of precipitation,potential evapotranspiration and underlying surface to runoff change through the sensitivity analysis of their elastic coefficients.The results show that:The depth of runoff in the upper reaches of the Liuchong River shows a significant downward trend from 1971 to 2009,and a significant abrupt change occurred in 1986.By comparing the sensitivity of precipitation,potential evapotranspiration,and underlying surface to runoff change,it is found that the elastic coefficient of precipitation is the highest,followed by the underlying surface index,and finally the potential evapotranspiration,indicating that runoff is the most sensitive to the change of precipitation.In addition,based on the results of the contribution rate of the three factors to the reduction of runoff,it is found that the contribution rate of decreasing precipitation to runoff reduction is as high as 113.3%,followed by the change of underlying surface,with a contribution rate of 14.4% and finally the increasing potential evapotranspiration,with a contribution rate of -27.7%.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.10.005runoff changeattribution analysiscoupled water-energy balance equationupper reaches of the Liuchong River Basin |
| spellingShingle | LONG Da DONG Qianjin YANG Rongfang Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation Renmin Zhujiang runoff change attribution analysis coupled water-energy balance equation upper reaches of the Liuchong River Basin |
| title | Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation |
| title_full | Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation |
| title_fullStr | Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation |
| title_full_unstemmed | Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation |
| title_short | Attribution Analysis of Runoff Change in the Upper Reaches of the Liuchong River Basin Based on Coupled Water-energy Balance Equation |
| title_sort | attribution analysis of runoff change in the upper reaches of the liuchong river basin based on coupled water energy balance equation |
| topic | runoff change attribution analysis coupled water-energy balance equation upper reaches of the Liuchong River Basin |
| url | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.10.005 |
| work_keys_str_mv | AT longda attributionanalysisofrunoffchangeintheupperreachesoftheliuchongriverbasinbasedoncoupledwaterenergybalanceequation AT dongqianjin attributionanalysisofrunoffchangeintheupperreachesoftheliuchongriverbasinbasedoncoupledwaterenergybalanceequation AT yangrongfang attributionanalysisofrunoffchangeintheupperreachesoftheliuchongriverbasinbasedoncoupledwaterenergybalanceequation |