The assessment of wetland changes on the Tibetan Plateau (TP) is an important component of global change research. The Damqu River Basin (DRB) lies within the southern source of the Yangtze River and is part of the core wetlands area of the Three Rivers Source Region (TRSR). We examined the distribution of wetlands across this region based on remote sensing image interpretations. The results revealed clear evidence of changes over the period between 1988 and 2015, with the ​​wetland area in 2015 being 8964.51 km² (53.52% of the total basin). Wetlands at this time were concentrated between 4700 and 5000 m (upper limit: 5600 m), with land slopes between 0 and 6°, and a northward aspect. The data also showed that the wetland area decreased by 71.16 km² between 1988 and 2015, equivalent to 0.79% of the 1988 total. The annual value of the normalized difference vegetation index (NDVI) decreased over 63.36% of the region within the DRB during 1988–2015. The area of three major lakes in the DRB declined from 2009 to 2015. The results of this analysis demonstrated that precipitation variation was the underlying cause of the observed vegetation index and lake area changes within the DRB between 1988 and 2015.

对青藏高原（TP）湿地变化的评估是全球变化研究的重要组成部分。大曲河流域（DRB）位于长江的南部源头，是三河源地区（TRSR）核心湿地区域的一部分。我们根据遥感影像解释研究了该地区湿地的分布。结果揭示了1988年至2015年期间变化的明显证据，2015年的湿地面积为8964.51 km ²（占流域总面积的53.52％）。此时的湿地集中在4700至5000 m（上限：5600 m）之间，地坡在0至6°之间，向北。数据还显示，湿地面积减少了71.16 km ²在1988年至2015年期间，相当于1988年总数的0.79％。在1988-2015年期间，DRB区域的标准化差异植被指数（NDVI）的年值下降了63.36％以上。从2009年到2015年，DRB中的三个主要湖泊的面积均有所减少。该分析结果表明，降水变化是1988年至2015年期间DRB内观测到的植被指数和湖泊面积变化的根本原因。