Groundwater Depth less than 15-feet No SLR

Groundwater modeling was used to simulate the effects of sea-level rise on groundwater levels in the New Hampshire Seacoast. The calibrated MODFLOW-USG Transport model (Panday, 2022) was used to simulate groundwater elevations under current sea levels and under various sea-level rise scenarios. Groundwater depth without SLR was estimated by subtracting the current groundwater levels from LiDAR ground surface elevations. Groundwater depths of less than 15 ft, 10 ft, and 5 ft were mapped for the current conditions. Groundwater depth for the various SLR scenarios can be estimated by subtracting the simulated SLR-induced groundwater rise from the current groundwater depth.本研究采用地下水建模手段，模拟海平面上升（Sea-Level Rise, SLR）对新罕布什尔州海岸带地下水位的影响。本研究采用经率定的MODFLOW-USG输运模型（MODFLOW-USG Transport，Panday, 2022），模拟当前海平面及多组海平面上升情景下的地下水位。无海平面上升情景下的地下水埋深，可通过激光雷达（LiDAR）获取的地面高程减去当前地下水位计算得到。针对当前情景，研究绘制了地下水埋深分别小于15英尺、10英尺及5英尺的分布范围图。针对各类海平面上升情景，其对应的地下水埋深可通过将当前地下水埋深减去模拟所得的海平面上升诱导地下水位抬升量计算得出。