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Arid Land Geography ›› 2026, Vol. 49 ›› Issue (8): 1531-1544.doi: 10.12118/j.issn.1000-6060.2025.298

• Climatology and Hydrology • Previous Articles     Next Articles

Spatiotemporal dynamic changes of typical lakes on the northern slope of Kunlun Mountains from 1990 to 2024

ZHANG Qifei1,2(), YUAN Zebin1, CHEN Yaning2(), XIANG Yanyun3, JIA Rong1, LIU Yuting4   

  1. 1 School of Geographic Sciences, Shanxi Normal University, Taiyuan 030031, Shanxi, China
    2 State Key Laboratory of Desert and Oasis Ecology/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    3 School of Public Administration, Shanxi University of Finance and Economics, Taiyuan 030006, Shanxi, China
    4 School of Life and Geographic Sciences, Kashgar University/Key Laboratory of Biological Resources and Ecology, Xinjiang Uygur Autonomous Region, Kashgar 844000, Xinjiang, China
  • Received:2025-05-24 Revised:2025-06-11 Online:2026-08-25 Published:2026-08-21
  • Contact: CHEN Yaning E-mail:zhangqifei15@mails.ucas.ac.cn;chenyn@ms.xjb.ac.cn

Abstract:

As sensitive indicators of climate change in arid regions, lakes provide critical insights into regional water resource allocation and utilization. Thus, the accurate identification of their spatiotemporal dynamics and driving mechanisms is of great significance. Employing multisource remote sensing and meteorological records from 1990 to 2024 and integrating the normalized difference water index with manual interpretation and correction, this study systematically extracted and cataloged lake dynamics on the northern slope of Kunlun Mountains. The spatiotemporal evolution of lakes and their driving mechanisms over the past 35 years were subsequently analyzed. The results indicate the following: (1) From 1990 to 2024, the number and total area of lakes on the northern slope of Kunlun Mountains increased significantly. While the number of lakes increased from 125 to 396 (216.80% increase), the total lake-area expanded from 1439.18 km2 to 2614.22 km2 (81.65% increase). (2) Spatially, the most significant lake-area expansion occurred in the Cherchen River Basin, where the lake-area increased by ~3.6 times, corresponding to a net gain of 138.86 km2. This was followed by the Hotan River Basin, where the lake-area approximately doubled, with a net gain of 46.98 km2, and the Kumukuli Basin, where the lake-area increased by 73.20%, corresponding to a net gain of 989.20 km2. Regarding elevation, mountain lakes exhibited a net area increase of 1144.47 km2, which was substantially higher than the 30.57 km2 increase observed for plain lakes. (3) Temporally, lake-area variations exhibited distinct stage-wise characteristics. Lake-area declined from 1990 to 1995, with an average annual loss of 23.26 km2·a-1, followed by continuous expansion after 1995. Notably, this period accounted for a rapid increase of 52.56 km2·a-1. Between 2000 and 2005, the mean annual growth rate of lake-area was 39.90 km2·a-1. After 2005, the rate of extreme changes fluctuated slightly but maintained an overall increasing trend. (4) Lake expansion on the northern slope of Kunlun Mountains was primarily driven by glacier and snowmelt resulting from the combined effects of soaring temperatures and increased precipitation. Over the past 35 years, mountain water storage has increased markedly and was accompanied by increases of 35.30% and 13.18% in temperature and precipitation, respectively. The Cherchen River and Kumukuli Basin exhibited particularly strong responses to these climatic changes. Conversely, fluctuations in plain lakes were mainly governed by the synergistic effects of enhanced evaporative demand associated with rising temperatures and variability in precipitation. These findings provide important scientific evidence and policy-relevant implications for water resource management and climate impact assessment in the northern Kunlun Mountains region.

Key words: normalized difference water index(NDWI), lake dynamic change, climate change, the northern slope of Kunlun Mountains