College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
J Environ Manage. 2022 Nov 15;322:115963. doi: 10.1016/j.jenvman.2022.115963. Epub 2022 Aug 27.
Understanding the changes in hydrological process is a key subject for water resource management of a high-diversity watershed. In this paper, through an establishment of a SWAT-based model, the effects of climate change and its induced vegetation change on hydrological process were analyzed in the East River Basin. The model could well simulate the hydrological processes of the basin including surface runoff (SURQ), groundwater (GWQ), lateral flow (LATQ), total water yield (WYLD), actual evapotranspiration (ET), and groundwater recharge (PERC). Under the vegetation change induced by temperature increase, the effects of the vegetation change on hydrological process were larger than that of the temperature change. Under the vegetation change caused by the increase of temperature and precipitation, the vegetation change enhanced the effects of climate change on annual SURQ, LATQ, GWQ, WYLD, and PERC of the basin. Under spatial scale, when the temperature and precipitation changed simultaneously, the increase of precipitation could promote the increase of annual ET in sub-watersheds. Also, the annual SURQ, WYLD, GWQ and ET in western sub-watersheds were more sensitive to the cumulative changes of vegetation and climate. This work can provide useful information to decision makers in water resource management of watersheds.
理解水文过程的变化是高多样性流域水资源管理的一个关键课题。本文通过建立基于 SWAT 的模型，分析了气候变化及其引起的植被变化对东河流域水文过程的影响。该模型可以很好地模拟流域的水文过程，包括地表径流（SURQ）、地下水（GWQ）、侧向流（LATQ）、总水量（WYLD）、实际蒸散（ET）和地下水补给（PERC）。在温度升高引起的植被变化下，植被变化对水文过程的影响大于温度变化的影响。在温度和降水增加引起的植被变化下，植被变化增强了气候变化对流域年 SURQ、LATQ、GWQ、WYLD 和 PERC 的影响。在空间尺度上，当温度和降水同时变化时，降水的增加可以促进流域各子流域年 ET 的增加。此外，西部子流域的年 SURQ、WYLD、GWQ 和 ET 对植被和气候累积变化更为敏感。这项工作可以为决策者提供有关流域水资源管理的有用信息。
