干旱区地理2024，Vol.47Issue(10)：1688-1699,12.DOI:10.12118/j.issn.1000-6060.2023.734
近40a流域气候变化与人类活动双重驱动下乌梁素海面积变化特征研究
Area change characteristics of Wuliangsuhai Lake driven by climate change and human activities in the basin in the past 40 years
摘要
Abstract
The variation in lake area is a key indicator of climate change and human activities within a basin.The spatiotemporal dynamics of lake area are essential for assessing changes in the lake's ecological environment and their impacts.Utilizing the Landsat series of satellite images,this study applies the normalized difference water index(NDWI),the modified normalized difference water index(MNDWI),the interspectral relationship method,and the maximum likelihood supervised classification technique to extract the area of Wuliangsuhai Lake,Inner Mongolia,China.A comparative analysis was conducted to evaluate the performance of these four water body in-dices.The supervised classification method,which demonstrated the highest precision,was employed to extract the area of Wuliangsuhai Lake from 1986 to 2021,and the lake's change trend was analyzed.Additionally,the trends and abrupt changes in temperature,precipitation,relative humidity,and potential evapotranspiration in the Wuliangsuhai Lake were analyzed using univariate linear regression,the M-K trend test,and the mutation test.The results indicate that the lake surface area of Wuliangsuhai Lake expanded from 316.19 km2 to 332.34 km2,re-flecting an increase of 5.11%.Temperature and precipitation showed a significant upward trend,while relative hu-midity and potential evapotranspiration also increased,indicating overall warming in the basin.From 2002 to 2021,the sown area of crops demonstrated a strong positive correlation with lake area,with GDP contributing 76.83%,population contributing 18.37%,and potential evapotranspiration contributing 7.73%to the overall change.关键词
湖泊面积/水体指数/气候变化/人类活动/驱动因素Key words
lake area/water index/climate change/human activities/drivers引用本文复制引用
孙金容,李兴,魏敬铤..近40a流域气候变化与人类活动双重驱动下乌梁素海面积变化特征研究[J].干旱区地理,2024,47(10):1688-1699,12.基金项目
中央引导地方科技发展资金项目(2020ZY0026) （2020ZY0026）
国家自然科学基金项目(52160022)资助 （52160022）
