State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research (IWHR), Beijing, 100038, China.
Institute of Water Resources and Hydrology Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China.
Sci Data. 2019 May 16;6(1):62. doi: 10.1038/s41597-019-0066-x.
A catchment is the basic unit for studying hydrologic cycle processes and associated climate change impacts. Accurate catchment delineation is essential in the field of hydrology, environment, and meteorology. Traditionally, catchment delineation is most easily carried out where the outflow area can be easily determined because of a well-defined outlet. The obstacle of the current study is to determine accurately the catchment boundary of lakes that are internally draining and, therefore, lack a well-defined outflow (i.e. inland lakes). This study describes a catchment delineation method which demarcated all the catchments of the lakes in the Qiangtang Plateau, especially for the inland lakes and their closed catchments. Lake catchment boundaries determined for the Qiangtang Plateau provide a significant advancement for water resource and climate change evaluation and agriculture production in the area.
集水区是研究水文循环过程和相关气候变化影响的基本单元。在水文学、环境和气象学领域，准确的流域划分至关重要。传统上，在流出区域容易确定的地方，流域划分最为容易，因为那里有明确的出口。当前研究的障碍是准确确定那些内部排水且缺乏明确流出（即内陆湖泊）的湖泊的流域边界。本研究描述了一种流域划分方法，该方法划定了青藏高原所有湖泊的流域，特别是内陆湖泊及其封闭流域。为青藏高原确定的湖泊流域边界为该地区的水资源和气候变化评估以及农业生产提供了重要进展。
