近50年阿牙克库木湖水域面积及湖岸线变化  

Lake Water Area and Shoreline Changes of Ayakkum Lake in Recent 50 Years

作　　者：马丹 赵英英 吴红波[1,2,3] MA Dan;ZHAO Yingying;WU Hongbo(Department of Geographical Science,Shaanxi University of Technology,Hanzhong 723000,China;Shaanxi Key of Laboratory of Earth Surface System and Environmental Carrying Capacity,Northwest University,Xi’an 710127,China;CAS Center for Excellence in Tibetan Plateau Earth Sciences,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]陕西理工大学地理科学系,陕西汉中723000 [2]西北大学陕西省地表系统与环境承载力重点实验室,陕西西安710127 [3]中国科学院青藏高原地球科学卓越创新中心,北京100101

出　　处：《地理空间信息》2024年第10期55-59,共5页Geospatial Information

基　　金：国家自然科学基金重点资助项目(42130516);国家自然科学基金青年基金资助项目(41601067)。

摘　　要：为了分析内陆湖泊水域面积和湖岸线的空间形态变化特征,基于Landsat MSS/TM/ETM/OLI影像,利用归一化水体指数提取1972—2022年阿牙克库木湖水域面积和湖岸线,重建湖区面积日值和年均变化曲线,并分析湖岸线变化的时空差异特征。结果表明:1972—2022年间阿牙克库木湖的水域面积呈扩张趋势;与1972年的湖区水域平均面积493.5 km^(2)相比,2022年阿牙克库木湖水域平均面积为1104.0 km^(2),湖区水域面积增加了610.5 km^(2)。1971—2000年间阿牙克库木湖岸线和湖区水域面积缓慢增加,2000—2022年间阿牙克库木湖湖区东部和南部岸线快速增长。湖岸线长度与湖区水域面积、发育系数和复杂程度呈正比,与湖岸线的圆形度呈反比。与1972年湖区质心位置相比,2022年阿牙克库木湖的质心位置向东南移动了11.37 km。In order to analyze the spatial morphological variations of inland lake water area and shoreline,based on the Landsat MSS/TM/ETM/OLI images from 1972 to 2022,we used normalized difference water index(NDWI)to extract the lake water area and shoreline of Ayakkum Lake,reconstructed the time series of daily and annual lake water area,and analyzed the spatio-temporal differences of lake shoreline.The results showed that the water area of Ayakkum Lake had been expanding trend from 1972 to 2022.Compared to the average annual lake water area of 493.5 km²in 1972,the average annual lake water area of Ayakkum Lake was 1104.0 km^(2) in 2022,the water area had increased by 610.5 km^(2).The shoreline length and lake water area of Ayakkum Lake slowly increased from 1971 to 2000,while the eastern and southern shorelines increased rapidly from 2000 to 2022.The length of lake shoreline was directly proportional to the water area,shoreline development index and complexity of the lake shoreline,and was inversely proportional to the circularity of lake shoreline.Compared with the centroid location on lake water area in 1972,the centroid had moved by 11.37 km to the southeast edge in 2022.

关 键 词：湖泊测量 湖岸线 湖泊面积 空间特征 

分 类 号：P237[天文地球—摄影测量与遥感]