ABSTRACT

The purpose of this study is to improve a simultaneous simulation of surface water and groundwater regimes with groundwater extraction to assess the implications for water management and propose primary solution approaches. The SWAT-MODFLOW model is performed for the Yom and Nan river basins during 2007–2016. The results demonstrate that the model provides an accurate depiction of the streamflow and groundwater heads when groundwater pumping is included. The recharges of surface water and groundwater are 2 times higher than the annual average value in the wet year (2011), whereas they are 3 times below the annual average in the dry year (2015). The downstream of Yom River basin is vulnerable to flooding, while high-terrain areas in Nan River basin are vulnerable to drought events. Capturing surplus water volumes during the wet season by recharging into the aquifer, coupled with improving the river capacity and forest areas, should be a sustainable solution for these issues.

摘要

本研究的目的是通过地下水提取改进地表水和地下水状况的同步模拟，以评估对水管理的影响并提出主要解决方案。SWAT-MODFLOW 模型在 2007-2016 年期间针对 Yom 和 Nan 河流域进行。结果表明，当包括地下水抽取时，该模型提供了对溪流和地下水水头的准确描述。地表水和地下水的补给量在丰水年（2011 年）比年平均值高 2 倍，而在旱年（2015 年）比年平均值低 3 倍。Yom 河流域的下游易受洪水侵袭，而南河流域的高地地区易受干旱事件的影响。