Potential Impact of Climate Change on Area Affected by Waterlogging and Saline Groundwater and Ecohydrology Management in Northeast Thailand
Potential Impact of Climate Change on Area Affected by Waterlogging and Saline Groundwater and Ecohydrology Management in Northeast Thailand
复制标题
气候变化对泰国东北部内涝和咸水地区的潜在影响及生态水文管理
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
C. A. Devi
中科院分区：
文献类型：
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作者：
Phayom Saraphirom;W. Wirojanagud;K. Srisuk;N. Nagarani;A. K. Kumaraguru;V. J. Devi;C. A. Devi
在泰国东北部地区的 Huai Khamriam 子流域，采用建模方法来预测气候变化对内涝和盐度分布的潜在影响，并在预测的气候条件下采用土地管理的生态水文学选项。根据 PRECIS RCM 情景 A2 的预测天气数据，使用由补给估计模型 HELP3 支持的变密度地下水模型 SEAWAT 来模拟预测。由于 PRECIS RCM 情景 A2 模拟的降水量较高，预计本世纪中叶以后的地下水补给量可能会更高。研究发现，受浅层咸水地下水影响的区域随着气候变化情景以及基本情况的增加而增加。根据情景模拟，气候变化对盐分分布没有产生实质性影响，但对内涝面积的扩大影响显着。使用生态水文学模拟方法进行管理选择，以减少对地下水系统的补给水，从而最大限度地减少未来较高降水量的影响。结果表明，在补给区建立速生树并结合浅层地下水拦截可以减少气候变化条件下涝渍和盐渍化面积的扩大。
Modeling approach was employed to predict potential impact of climate change on waterlogging and salinity distribution with the ecohydrology options for land management under the projected climate conditions in Huai Khamriam subwatershed in the northeastern region, Thailand. The prediction was simulated using the variable density groundwater model SEAWAT supported with recharge estimation model HELP3 under the projected weather data from PRECIS RCM scenario A2. As the result of the higher precipitation simulated by PRECIS RCM scenario A2, the predicted groundwater recharge was likely to be higher in the middle of this century onward. The areas affected by shallow saline groundwater were found to increase with the climate change scenario as well as for the base case. Based on scenario simulation, climate change did not have substantial impact on salinity distribution, but it was significant impact to the expansion of waterlogging areas. Management option using ecohydrology simulation approach was performed to reduce the recharge water to groundwater system, which consequently minimizes the impact of the higher precipitation in the future. The results indicated that establishment of the fast growing tree integrated with the shallow groundwater interception in the recharge areas could reduce the expansion of waterlogging and salinised areas under the climate change condition.