生态与农村环境学报2026，Vol.42Issue(1)：78-90,13.DOI:10.19741/j.issn.1673-4831.2025.0002
洪泽湖湿地水生植被时空演进特征及与水文情势的关联研究
Spatio-temporal Evolution Characteristics of Wetland Aquatic Vegetation in Hongze Lake and Its Relationship with Hydrological Regimes
摘要
Abstract
Hongze Lake,the fourth largest freshwater lake in China,plays a crucial role in flood control,drought mitiga-tion,and water supply in the lower reaches of Huai River basin.It also serves as a regulating reservoir along the eastern route of the South-to-North Water Diversion Project,exerting significant influencing on the region's sustainable economic and social development.Aquatic vegetation constitutes an essential component of the lake's ecosystem,actively contribu-ting to maintaining ecosystem health and preventing ecological risks.Based on Landsat imagery data from 1985 to 2023 and using a random forest classification algorithm,this study extracted spatiotemporal distribution of emergent vegetation,submerged vegetation,aquaculture zones and open-water areas in Hongze Lake.It further analyzed the long-term temporal characteristics,trends,and patterns of aquatic vegetation changes,examined hydrological dynamics,and revealed their linkages with vegetation evolution.The study yielded the following key findings:(1)Wetland aquatic vegetation showed an overall declining trend,with submerged vegetation decreasing by more than 80%.Aquaculture areas first expanded and then decreased,while the extent of emergent vegetation remained relatively stable;(2)Aquatic vegetation shifted from lakeshore zones dominated by emergent vegetation towards open water zones suitable for submerged vegetation,forming a distinct zonal distribution pattern.The spatial distribution of emergent and submerged vegetation exhibited strong heteroge-neity,with pronounced fragmentation of vegetation zones after 2010;(3)The hydrological regime of Hongze Lake dis-played an inverse seasonal fluctuation,with high water levels in winter and spring and low water levels in summer.Higher average water levels during the storage period suppressed the growth of submerged vegetation,whereas relatively high flooding frequency(0.6-0.8)prompted its expansion.Based on these findings,the study recommends strengthening the rehabilitation of wetland aquatic vegetation in lakeshore zones and restoring vegetation in key areas,promoting the con-version of reclaimed land back to the lake and the ecosystem reconstruction,and improving management frameworks for precise regulation.These efforts aim to support the restoration and conservation of the Hongze Lake wetland ecosystem.This study explores the spatiotemporal evolution of wetland aquatic vegetation in Hongze Lake and its relationship with hydrological regimes,serving as an initial step in advancing research on lake ecological conservation and restoration.关键词
湿地水生植被/水文情势/时空变化/水文响应/洪泽湖Key words
wetland aquatic vegetation/hydrological regimes/spatiotemporal dynamics/hydrological response/Hongze Lake分类
资源环境引用本文复制引用
蒋宇,王浩然,王雪然,万荣荣,董雅文..洪泽湖湿地水生植被时空演进特征及与水文情势的关联研究[J].生态与农村环境学报,2026,42(1):78-90,13.基金项目
科技基础资源调查专项(2023FY100105) （2023FY100105）
中国科学院A类战略性先导科技专项(XDA23020201) （XDA23020201）
