南京林业大学学报（自然科学版）2024，Vol.48Issue(2)：9-18,10.DOI:10.12302/j.issn.1000-2006.202303019
基于全球地表水数据的长沙市湿地景观动态变化研究
Dynamic change of wetland landscape in Changsha based on JRC global surface water data
摘要
Abstract
[Objective]The objectives of this study were to explore the temporal and spatial evolutions of wetland landscape in Changsha from 1999 to 2019,to comprehensively analyze the dynamic-change characteristics of wetland-landscape patterns in Changsha in the same period,and to explore the influence mechanism of natural and human factors on wetland-landscape patterns,so as to provide an important theoretical basis for the protection and rational utilization of wetlands in Changsha.[Method]Based on global surface water data(GSWD),combined with meteorological and hydrological data,this paper adopted the methods of wetland distribution information extraction,wetland type classification and landscape pattern index,aiming to achieve long-term and continuous monitoring of the dynamic evolution of annual wetland-landscape patterns in Changsha City from 1999 to 2019 based on the seasonal and fluctuating characteristics of wetlands.In addition,we analyzed the evolution trend of its long time scale,as well as the short-term fluctuation change characteristics.[Result](1)Since 1999,the wetland area in Changsha has been overall increase,with permanent river being the main wetland type.From 2007 to 2009,there was a large fluctuation in wetland landscape,as represented by the transformation of permanent rivers and lakes to seasonal rivers and lakes,respectively,in the early stage,and by the reversal of fragmentation after 2008.The fragmentation degree of wetland-landscape pattern in Changsha continuously intensified until 2017 and later began to gradually recover.(2)The wetland-landscape pattern in Changsha was greatly affected by the natural factors such as precipitation and runoff from the Xiangjiang River and extreme freezing disasters that led to large fluctuations of the wetland-landscape pattern.The wetland landscape pattern in Changsha was also affected by human factors such as growing population and urban expansion that may lead to the intensification,but government policies and measures had a positive effect on wetland restoration.[Conclusion]It was feasible to use GSWD to extract wetland information.The wetland area in Changsha had continued to grow,among which permanent river was the main wetland type.The results from this study could provide important scientific references for the protection and rational utilization of wetlands in Changsha.关键词
湿地/景观格局/全球地表水数据/长沙市Key words
wetland/landscape pattern/global surface water data(GSWD)/Changsha City分类
农业科技引用本文复制引用
曾哲礼,佘济云,唐子朝,罗楚滢..基于全球地表水数据的长沙市湿地景观动态变化研究[J].南京林业大学学报（自然科学版）,2024,48(2):9-18,10.基金项目
长沙市科技计划项目(kq1801082). （kq1801082）
