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Potential impact of climate change on area affected by waterlogging and saline groundwater and ecohydrology management in northeast Thailand

This study applies a modelling approach to predict the potential impact of climate change on waterlogging and salinity distribution with ecohydrology as an option for land management under the projected climate conditions in Huai Khamriam sub-watershed in the northeastern region of Thailand. The areas affected by shallow saline groundwater were found to increase with the simulated climate change scenario. Based on scenario simulation, climate change did not have a substantial impact on salinity distribution, but it had a significant impact to the expansion of waterlogging areas. A management option using ecohydrology simulation approach was performed to reduce the amount of recharge water to groundwater systems. The results indicate that the introduction of fast growing tree species integrated with the shallow groundwater interception in the recharge areas could reduce the expansion of waterlogging and salinised areas under the climate change conditions.