9:45 AM - 10:00 AM
[AHW18-04] Impact of Land use change on groundwater recharge in an emerging suburban catchment——Evaluation for Sustainable water use
Keywords:Urbanization, Forest Evapotranspiration, Kurose basin, Raster resolution, SWAT
Results suggest that mean annual groundwater recharge decreased by approximately 34.9% over the past three decades. Land use change analysis was conducted from 1986 to 2006 by using land use maps at different resolutions. Groundwater recharge simulation results were affected by resolution scaling at both 10 m and 100 m spatial resolutions. Nevertheless, the forest cover and urban areas could not be accurately depicted at 100 m and 10 m resolutions. Across the entire study area, long-term temporal changes in land use had a significant impact on groundwater recharge and forest ET. Overall, we demonstrated the sensitivity of catchment to land-use changes caused by anthropogenic activities; this would help future urban planning projects to minimize undesirable impacts on groundwater recharge while striving for sustainable water management.
This study is supported by Asia-Pacific Network for Global Change Research (APN) (CRRP2019-09MY-Onodera)