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首页> 外文期刊>Water Resources Management >Quantifying Surface Water and Ground Water Interactions using a Coupled SWAT_FEM Model: Implications of Management Practices on Hydrological Processes in Irrigated River Basins
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Quantifying Surface Water and Ground Water Interactions using a Coupled SWAT_FEM Model: Implications of Management Practices on Hydrological Processes in Irrigated River Basins

机译：使用耦合的SWAT_FEM模型量化地表水和地面水相互作用：管理实践对灌溉河流域水文过程的影响

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摘要

This study coupled the Soil and Water Assessment Tool (SWAT) with a ground water finite element model (FEM) with the enhancements of multiple interface conversions and management practices. The coupled model, SWAT_FEM was applied to assess the hydrology of the Chennai River basin in India, a coastal zone with significant irrigation. The SWAT_FEM enhanced the predictions of stream flows and ground water levels (R-2:0.69,0.81; Nash Sutcliffe Efficiency (NSE):0.64,0.74) compared to the standalone model, SWAT (R-2:0.64,0.66; NSE:0.60,0.63) respectively. The coupled model produced an all-inclusive representation of the impacts of management practices on the hydrological processes and generated insights into the spatiotemporal patterns of the surface water and ground water interactions in the study area. The results showed that the interactions of surface water and ground water were significant in the mainstream of Chennai River basin. The seasonal ground water levels obtained with the SWAT_FEM model reinforced the increases in exorbitant ground water abstraction rates (9%-44%) with the introduction of management practices including reservoirs, pond irrigation, and agricultural water use. The results emphasized that if the ground water demand continued to increase, accelerated and unregulated ground water extraction is bound to happen shortly to suffice the water use, which can bring about environmental problems to this basin. Overall, this study demonstrated the applicability of the SWAT_FEM model and its value to the water resources management in irrigated areas with management practices. The developed model can be utilized in water resources assessment tools for effective predictions of ground water contributions in river basins.
机译：该研究将土壤和水评估工具（SWAT）与地下水有限元模型（FEM）耦合，具有多种界面转换和管理实践的增强。耦合型号，SWAT_FEM应用于评估印度钦奈河流域水文，沿海地区，具有重大灌溉。与独立模型，SWAT（R-2：0.64,0.66; NSE： 0.60,0.63）分别。耦合模型制作了全包物，对水文过程对水文过程的影响以及生成了研究区的地表水和地面水相互作用的洞察的影响。结果表明，钦奈河流域的主流中，地表水和地面水的相互作用是显着的。通过SWAT_FEM模型获得的季节性地面水平加强了过高的地面抽取率的增加（9％-44％），引入了管理实践，包括水库，池塘灌溉和农业用水。结果强调，如果地下水需求持续增加，加速和不受管制的地水萃取必然会发生，以足够的用水，这可以带来这种盆地的环境问题。总体而言，本研究证明了斯瓦图_FEM模型的适用性及其对灌溉地区水资源管理的价值，管理实践。开发模型可用于水资源评估工具，以有效预测河流盆地地下水贡献。

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