Attribution Identification of Runoff Change Before and After Impoundment in the Three Gorges Reservoir Area Based on Budyko Hypothesis

CHEN Meng'en; WEI Xing; ZHOU Yulin; SHI Ruibo; LI Yineng

doi:10.13870/j.cnki.stbcxb.2024.02.038

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Attribution Identification of Runoff Change Before and After Impoundment in the Three Gorges Reservoir Area Based on Budyko Hypothesis

更新时间：2025-03-12

- Attribution Identification of Runoff Change Before and After Impoundment in the Three Gorges Reservoir Area Based on Budyko Hypothesis
- Vol. 38, Issue 2, Pages: 76-84(2024)
- 作者机构：
  
  重庆三峡学院土木工程学院,重庆,404100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2024.02.038
  CLC： P333.1
- Published：2024
- 稿件说明：
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CHEN Meng'en, WEI Xing, ZHOU Yulin, et al. Attribution Identification of Runoff Change Before and After Impoundment in the Three Gorges Reservoir Area Based on Budyko Hypothesis[J]. 2024, 38(2): 76-84.
DOI：

CHEN Meng'en, WEI Xing, ZHOU Yulin, et al. Attribution Identification of Runoff Change Before and After Impoundment in the Three Gorges Reservoir Area Based on Budyko Hypothesis[J]. 2024, 38(2): 76-84. DOI： 10.13870/j.cnki.stbcxb.2024.02.038.

摘要

[目的] 径流在气候变化和人类活动的共同影响下发生变化

探索径流时空演变规律及其原因对水库科学调度及水资源的可持续利用具有重要指导意义。[方法] 基于三峡库区"腹心"万州段1960—2019年的气象水文数据

首先采用Mann-Kendall趋势检验、Pettitt突变分析和小波分析对三峡库区蓄水前后径流的时空演变特征进行分析

最后采用2种Budyko水热耦合平衡方程

定量计算气候变化和人类活动对径流变化的影响率。[结果] (1)研究区年径流量呈显著下降趋势(|z|＞2.58)

2003年(三峡库区蓄水年)出现拐点

随后年内分配更加均匀。(2)与蓄水前相比较

蓄水后气候变化和人类活动对研究区年径流减少的贡献率为27.9%~29.2%和70.8%~72.1%。(3)人类活动主要通过改变土地利用类型和建设水利工程影响流域年径流量

林地、建设用地面积的增加和三峡库区的建设影响研究区水文循环过程使年径流量减少。[结论] 研究结果定量描述人类活动对径流变化的影响

对下一阶段三峡库区水资源管理提供理论支撑。

Abstract

[Objective] Runoff changes under the combined influence of climate change and human activities. Exploring the temporal and spatial evolution of runoff and its causes has important guiding significance for the scientific operation of reservoirs and the sustainable use of water resources. [Methods] Based on the meteorological and hydrological data of the Wanzhou section of the Three Gorges Reservoir Area from 1960 to 2019

Mann-Kendall trend test

Pettitt mutation analysis and wavelet analysis were used to analyze the spatial and temporal evolution characteristics of runoff before and after the impoundment in the Three Gorges Reservoir Area. Finally

two Budyko hydrothermal coupling equilibrium equations were used to quantitatively calculate the influence rate of climate change and human activities on runoff change. [Results] (1) The annual runoff in the study area showed a significant downward trend (|z|＞2.58)

with the inflection point appearing in 2003 (the impoundment year of the Three Gorges Reservoir Area)

after which the annual distribution was more uniform. (2) Compared to the period before impoundment

the contribution rates of climate change and human activities to the reduction of annual runoff in the study area after impoundment were 27.9% to 29.2% and 70.8% to 72.1%

respectively. (3) Human activities primarily influence the annual runoff of the basin by altering the type of land use and the construction of water conservation projects. [Conclusion] This study quantitatively describes the impact of human activities on runoff changes

and provides the oretical support for the next stage of water resources management in the Three Gorges Reservoir Area.

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