Study on the Characteristics and Driving Mechanism of Water Area Change in Hulun Lake during Wet Season
Monitoring the dynamics of lake surface water area is crucial for understanding the distribution and change trends of water resources.Based on the Google Earth Engine(GEE)cloud platform,Landsat remote sensing images from 1986 to 2021 were used to analyze the characteristics and driving mechanism of the water area change in Hulun Lake.The results showed that the MNDWI wa-ter extraction algorithm achieved an overall accuracy of 98％,demonstrating excellent performance in extracting water information.From 1986 to 2021,the water area of Hulun Lake showed a fluctuating trend of first increasing,then decreasing and increasing again.Over 36 years,the area expanded by 89.57 km2,with a variation of 4.09％.The most significant changes occurred in the northeastern and southern parts of the lake.The water area decreased during 1986-1989 and 2005-2021,respectively(UF＜0,α=0.01),and increased during 1990-2004(UF＞0,α=0.01).In general,the lake area gradually recovered.There was a significant positive correlation between the relative humidity and water area.The vegetation coverage,the number of people in agriculture,for-estry,animal husbandry and fishery were negatively correlated with the water area.
Google Earth EngineWater indexHulun LakeWater body areaInfluencing factor
NETL
NSTL
万方数据
