水资源保护2026，Vol.42Issue(1)：93-102,10.DOI:10.3880/j.issn.1004-6933.2026.01.010
1961-2018年南水北调中线水网区水文干旱时空演变与区域分异研究
Study on spatiotemporal evolution and regional differentiation of hydrological drought in water network area of the South-to-North Water Diversion Middle Route Project from 1961 to 2018
摘要
Abstract
Based on the three-dimensional clustering algorithm,historical hydrological drought events in the water network area of the South to North Water Diversion Middle Route Project from 1961 to 2018 were identified.The spatiotemporal evolution process of historical drought clusters and severe drought events was quantitatively analyzed,revealing the spatiotemporal encounter patterns of water deficit in the water source and water receiving areas.The potential causes of spatial differentiation of drought and the influence of water network density on drought duration were explored.The results indicate that from 1961 to 2018,multiple prolonged and large-scale extreme and severe drought events occurred in the water network area,which are basically consistent with the actual drought situation.The drought in the water source and water receiving areas shows significant spatiotemporal differentiation characteristics,which are related to differences in precipitation and underlying surface conditions.The frequency and intensity of drought in the water receiving area are significantly higher than those in the water source area.But in the 1990s,the frequency of drought in the water source area increased,and after the 21st Century,it showed a spatiotemporal asynchronous phenomenon with the water receiving area.The density of water networks has a certain regulatory effect on drought duration,but there is a marginal effect.关键词
水文干旱/水网密度/三维聚类算法/水源区/受水区/南水北调中线工程Key words
hydrological drought/water network density/three-dimensional clustering algorithm/water source area/water receiving area/the South-to-North Water Diversion Middle Route Project引用本文复制引用
杨子谦,王宗志,万文华,程亮,王文琪..1961-2018年南水北调中线水网区水文干旱时空演变与区域分异研究[J].水资源保护,2026,42(1):93-102,10.基金项目
国家重点研发计划项目(2023YFC3006601) （2023YFC3006601）
国家自然科学基金项目(U2240223,52409040) （U2240223,52409040）
