1988—2018年那曲市其香错水域面积变化及原因分析  

Change of Qixiangco lake area and its reasons in Naqu city from 1988 to 2018

作　　者：拉巴[1] 边多 顿玉多吉 央美 张伟华 白玛仁增 LA Ba;BIAN Duo;DUNYU Duo-ji;YANG Mei;ZHANG Wei-hua;BAIMA Ren-zeng(Climate Center of Tibet Autonomous Region,Lhasa 850001,China;Naqu Meteorological Service,Naqu 852000,China)

机构地区：[1]西藏自治区气候中心,西藏拉萨850001 [2]那曲市气象局,西藏那曲852000

出　　处：《气象与环境学报》2021年第5期72-77,共6页Journal of Meteorology and Environment

基　　金：第二次青藏高原综合科学考察项目(2019QZKK0106);2019年西藏自治区科技重点研发计划“西藏主要地表特征科学考察及研究”和高原遥感应用技术创新团队联合资助。

摘　　要：基于Landsat卫星遥感数据,采用水体指数法和相关分析法,分析1988—2018年那曲市双湖县其香错湖泊水域面积变化及原因。结果表明:该湖泊近31 a内水域面积呈显著增长趋势(R^(2)=0.88,P<0.001),31 a内增长了33.37 km^(2),增长率为18.03%;从空间上分析,其香错在近31 a内湖泊面积不断向四周扩展,其中在东、西方向和北部变化尤为显著。湖泊所在区域年平均气温呈增加趋势,蒸发量显著减小,冻土深度也明显减小。在上述因素的共同作用下,引起湖泊补给水源的增加和湖泊水容量的增大,最终导致湖泊面积持续上涨。Based on Landsat satellite remote sensing data,the water body index and correlation analysis methods were used to analyze the water area change of Qixiangco lake in Shuanghu county of Naqu city from 1988 to 2018.The results showed that the water area of the lake increased significantly by 33.37 km^(2) in the recent 31 years(R=0.88,P<0.001)with a rate of 18.03%.In terms of space,the lake area expanded continuously around in the past 31 years,especially in the east,the west,and the north.In addition,the annual average temperature in the region where the lake is located increased,the evaporation capacity significantly reduced,and the frozen soil depth was also significantly reduced.Under the combined action of the above factors,the increase of lake water supply source and lake water volume lead to the continuous increase of lake area.

关 键 词：那曲市 其香错湖 水体指数 水域面积 

分 类 号：P405[天文地球—大气科学及气象学]