Analysis on Lake Change and Its Cause in Qaidam Basin

6th Annual 2018 International Conference on Geo-Spatial Knowledge and Intelligence

Du, Yue^1 ; Liu, Baokang^2 ; He, Weiguo^3 ; Zhou, Jianping^1 ; Duan, Shuiqiang^4

Natural Energy Research Institute, Gansu, Lanzhou

730046, China^1

College of Resources and Environmental Engineering, Tianshui Normal University, 741000, China^2

Information Science School of Guangdong University of Finance and Economics, Guangzhou

510320, China^3

Hydrology and Water Resource Bureau of Qinghai Province, Xining

810001, China^4

关键词: Annual mean temperatures;    Human activities;    Multi-Sources;    Rate of increase;    Satellite data;    Sensitive indicator;    Shallow lakes;    Temporal and spatial dynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/234/1/012016/pdf
DOI  :  10.1088/1755-1315/234/1/012016

来源: IOP

【 摘 要 】

Plateau lakes are sensitive indicators of climate change. This study used multi-source satellite data to monitor the temporal and spatial dynamics of the lake area in the Qaidam Basin. There sults showed that the lakes in Qaidam Basin were in different conditions. The lakes in the core area of the basin were affected by human activities and the lake are achanges drastically. The lakes around the basin were less affected by human activities and could better reflect the climate change. In the past 50 years, the climate of the Qaidam Basin has generally been warm and humid. The annual mean temperature increases from east to west tends to decrease; the precipitation was just opposite to the temperature, and the rate of increase decreases from east to west.In the eastern part of the basin, there was a significant increase in Delingha; the area of Lake Hala in the east has increased by 18.59km2 over the past 52 years, and the area of Xiaodan Lake in the middle has expanded by 19.87 km2 compared with the same period in the past 13 years, while the west of the Muse the overall trend of Lake Kule Lake decreased after the increase; overall, the shallow lakes in the Qaidam Basin were shallow, and the flatness of the lake bottom and the significant increase in precipitation were the main reasons for the significant expansion of its area, while the area oflakes in the western part of the basin decreases. The temperature was obviously higher, and the increase in precipitation is not obvious.