A new method on hydrological change degree evaluation for quantifying the impact of reservoir operation: A case study on the middle reaches of the Yangtze River (Yichang-Datong)
Year: 2025
Type: article
Abstract: 梯级水库运行已成为人类活动中的主要影响因素，为定量评估水库（群）运行导致的下游河道水文情势的变化，本文基于传统RVA法提出了改进的水文改变度评价方法，并以受梯级水库群影响较大的长江宜昌至大通河段为典型研究区域，对同一时段水库运行前后各站点水文情势变化进行了分析。结果表明：与传统RVA法对比，宜昌站整体改变度增高了8%，为高变化度；大通站整体改变度降低了12%，为低变化度；宜昌-大通站整体改变度符合水库影响沿程逐渐减弱的规律；水库(群)影响主要表现为蓄丰补枯，改进水文改变度法中18个指标改变度较传统RVA法变幅更大，能够更好地反映梯级水库运行对下游水文情势的影响。该研究可为后续研究受水库运行影响下流域水文情势分析以及流域水库生态调度提供技术支撑。
Source: Journal of Lake Sciences
DOI: 10.18307/2025.0244
Authors: Dai Minglong, Hydrology Bureau of Changjiang Water Resources Commission, Wuhan 430010 , P.R.China ;
Innovation Team of Flood and Drought Disaster Prevention of Changjiang Water Resources Commission, Wuhan 430010 , P.R.China, Qi Junli, Qiu Hongya, Qin Youwei, Zhang Dongdong
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4408842722