洞庭湖区植被覆盖度下降成因分析  

Cause analysis of vegetation coverage decline in Dongting lake area

作　　者：韩沁哲[1] 邵佳丽 陈磊士 周碧[1] HAN Qin-zhe;SHAO Jia-li;CHEN Lei-shi;ZHOU Bi(Institute of Meteorological Science of Hunan Province/Hunan Key Laboratory of Meteorological Disaster Prevention and Reduction,Changsha 410118,China;National Satellite Meteorology Center,Beijing 100081,China)

机构地区：[1]湖南省气象科学研究所/湖南省防灾减灾重点实验室,长沙410118 [2]国家气象卫星中心,北京100081

出　　处：《湖北农业科学》2021年第1期27-31,共5页Hubei Agricultural Sciences

摘　　要：基于EOS/MODIS、FY-3/MERSI卫星数据计算植被覆盖度和水体面积,结合土地分类数据、气象数据、夜间灯光数据、统计年鉴,通过定量化计算,探索洞庭湖区不同地表类型植被覆盖度下降的气候和人为成因。结果表明,2000—2019年洞庭湖植被覆盖度下降区域集中在水田、人口聚集区和湿地地类;从气候影响来看,水田、人口聚集区的植被下降与5—8月降水量偏少关系密切,湿地植被覆盖度下降的面积与气候变化、水体面积都有关,下降程度与水体面积变化关系更密切,三峡蓄水可减轻水体对湿地植被的影响;从人为因素看,水田、人口聚集区、湿地植被覆盖度分别受农业种植结构、地区生产总值、夜间灯光指数和杨树砍伐的影响。Vegetation coverage and water area were calculated based on EOS/MODIS and FY-3/MERSI satellite data,combined with surface classification data,meteorological data,nighttime light image,Hunan statistical yearbook data,through quantitative calculation,to explore the climatic and anthropogenic causes of vegetation coverage decline of different surface types in Dongting lake area.The results showed that the decrease of vegetation coverage in Dongting lake area from 2000 to 2019 was mainly concentrated in paddy fields,population gathering areas and wetland areas;From the perspective of climate impact,vegetation decline in paddy fields and population gathering areas was closely related to less precipitation in May to August,the decreased area of wetland vegetation coverage was related to climate change and water area,the decrease degree of vegetation coverage was more closely related to the change of water area,and water storage in the Three Gorges could reduce the impact of water on wetland vegetation.From the perspective of human factors,the vegetation coverage of paddy field,population gathering area and wetland was respectively affected by the agricultural planting structure,regional GDP,nighttime light index,and poplar cutting.

关 键 词：洞庭湖 植被覆盖度 下降 成因 水体面积 夜间灯光指数 遥感 

分 类 号：Q948.3[生物学—植物学]