GroMoPo Metadata for Rio Salado MODFLOW model

The Rio Salado catchment covers 170,000km2 of the Buenos Aires province, Argentina. The area suffers from persistent flooding situations that affect a large proportion of the catchment and hence imposes a severe constraint in the existing production levels and in the realisation of the fall economic potential of the region. The complexity of the landscape and the delicate groundwater-surface water interaction in a large dune field area made it essential to develop different approaches to model such interaction, as part of the study for an Integrated Master Plan for the whole basin. An approach using MODFLOW proved to be useful at a regional and prefeasibility level to generate flood risk maps and estimate net benefits for different drainage schemes. However ISISMOD, a groundwater model coupled with a surface water model proved to be a key water resource management tool to support feasibility studies and the detailed design of a drainage network capable of removing flood waters without detriment to the wetlands and fresh groundwater lenses of the area during dry periods.

阿根廷布宜诺斯艾利斯省境内的萨拉多河（Rio Salado）流域总面积达17万平方千米。该区域长期遭受持续性洪涝灾害，洪涝波及流域大片范围，不仅对现有生产水平构成严重制约，也阻碍了该区域经济潜力的充分释放。该区域复杂的景观格局与大型沙丘区内敏感的地下水-地表水交互作用，使得作为全流域综合总体规划研究的组成部分，有必要开发多种方法以模拟此类交互过程。经实践验证，在区域及预可行性研究层面，采用MODFLOW模型的方法可有效生成洪涝风险地图，并评估不同排水方案的净收益。然而，将地下水模型与地表水模型耦合的ISISMOD模型，则成为支撑可行性研究与排水管网详细设计的关键水资源管理工具：该管网可在旱季排除洪涝积水的同时，不对区域内的湿地与淡水地下水透镜体造成损害。