Assessment of rainwater collection sites in karst areas using the swat model

Kwong Fai Andrew Lo, Thomas Chao-Chun Huang, Guanghui Jiang

It is vital to study in greater detail the process of rainwater collection in epikarst zone, in order to enhance water storage, to accelerate water cycle and to improve water quality. This study focuses on assessing the hydrologic environment in the karst areas and also illustrates the use of computer modeling (SWAT Model) to select the best sites to install such rainwater collection devices. Yaji experimental site is chosen as the study area of this study. It is about 8 km east from Guilin City, Guangxi Zhuang Autonomous Region in South China. The total area of the experimental site is about 2 km2. The ArcSWAT model is used to simulate hydrological responses at the study site from 1979 to 2013 and for individual year of 1993, 2003, and 2013. Combining all three time periods (1993, 2003, 2013), the selected common sub-basins are located in three zones. These zones are concentrated at the western and northeastern parts of the study site. These sub-basins are most suitable for rainwater collection during both dry and wet years. The stored rainwater should be able to increase the availability of water resources. Treated rainwater may provide domestic drinking water need. Untreated rainwater may be used for non-potable uses such as irrigation, toilet flushing, landscaping, and groundwater recharge.

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   Vol. 07, Issue 02, February 2017



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