Improved Method for Simulating Groundwater Inundation Using the MODFLOW 6 Lake Transport Package
Improved Method for Simulating Groundwater Inundation Using the MODFLOW 6 Lake Transport Package
复制标题
使用 MODFLOW 6 Lake Transport 包模拟地下水淹没的改进方法
DOI：
10.1111/gwat.13254
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发表时间：
2023
期刊：
影响因子：
2.6
通讯作者：
Gulley, Jason
中科院分区：
文献类型：
--
作者：
Mancewicz, Lauren K.;Mayer, Alex;Langevin, Christian;Gulley, Jason
海平面上升造成的地下水泛滥会使地下水位直接、持续蒸发，从而影响岛屿和沿海淡水资源。地下水淹没对沿海和岛屿含水层的影响的数值模拟一直受到限制，无法模拟溶质运移和变密度流之间的含水层和湖泊形成的地下水淹没。因此，我们为MODFLOW 6开发了一个新工具，即Lake Transport Package，该工具可以计算湖泊内的溶质浓度，并允许湖泊和含水层之间的变密度流动。在这里，我们使用地下水淹没作为一个示例应用程序来展示湖运输包的功能和使用此工具的优势，在过去的方法表示地下水淹没。我们根据巴哈马的水文地质特征开发了假设的岛屿模拟。模拟了多次海平面上升和湖泊蒸发速率，以评估不同气候条件下地下水淹没对淡水透镜尺寸的影响。结果表明，湖泊运输包的能力，计算湖泊的溶质浓度的瞬态模拟，包括高盐浓度。更高的海平面上升和更大的湖泊蒸发率导致更大的淡水透镜损失和更高的湖泊盐度。湖泊的形成和由于地下水泛滥而引起的相应扩张会使淡水的损失增加6- 36%，这取决于湖泊的蒸发率。这些模拟验证的性能，并证明有用的湖运输包作为一种工具，代表地下水淹没。
Groundwater inundation due to sea level rise can affect island and coastal freshwater resources by exposing water tables to direct, continuous evaporation. Numerical simulations of groundwater inundation effects on coastal and island aquifers have been limited by an inability to simulate solute transport and variable density flow between the aquifer and lakes formed by groundwater inundation. Consequently, we contributed to the development of a new tool, the Lake Transport Package, for MODFLOW 6 that can calculate solute concentrations within lakes and allows for variable density flow between lakes and aquifers. Here we use groundwater inundation as an example application to showcase the functionality of the Lake Transport Package and the advantages of using this tool over past methods of representing groundwater inundation. We developed hypothetical island simulations based on hydrogeological characteristics of the Bahamas. Multiple sea level rise and lake evaporation rates were simulated to evaluate the effects of groundwater inundation on freshwater lens size for different climates. The results demonstrate the ability of the Lake Transport Package to calculate the solute concentration of the lake for transient simulations, including hypersaline concentrations. Higher sea level rise and greater lake evaporation rates lead to a greater loss of the freshwater lens and higher lake salinity. The formation of a lake and corresponding expansion due to groundwater inundation increases the loss of freshwater by 6–36%, depending on the lake evaporation rate. These simulations validate the performance and demonstrate usefulness of the Lake Transport Package as a tool in representing groundwater inundation.
用于密度相关流动和传输的液压头配方
影响因子：
2.6
作者：
C. Langevin;Sorab Panday;A. Provost
通讯作者：
A. Provost
影响因子：
2.6
作者：
Masterson, John P.;Fienen, Michael N.;Plant, Nathaniel G.
通讯作者：
Plant, Nathaniel G.