Regional Hydrogeochemistry of a Modern Coastal Mixing Zone
Regional Hydrogeochemistry of a Modern Coastal Mixing Zone
复制标题
DOI：
10.1029/95wr03244
复制
发表时间：
1996-02
影响因子：
5.4
通讯作者：
C. Wicks;J. Herman
中科院分区：
文献类型：
--
作者：
C. Wicks;J. Herman
在中西部佛罗里达，地下水样品收集沿着流动路径在非封闭的上弗洛里丹含水层，跨越内陆，淡水补给区和沿海排放区。地下水流动和溶质运移模型被用来评估地下水流动和混合的新鲜和咸水沿着一个横截面的无压上Floridan含水层。结果表明，8%~ 15%的新鲜地下水和30%~ 31%的含盐地下水渗透到流动系统的深处，在那里可能与石膏接触和溶解。深循环的淡水和咸水返回到近地表环境排放富CaSO 4水到沿海地区，在那里它与新鲜的CaHCO 3地下水混合，从而在现代混合区的方解石沉淀的预测。
In west central Florida, groundwater samples were collected along flow paths in the unconfined upper Floridan aquifer that cross the inland, freshwater recharge area and the coastal discharge area. A groundwater flow and solute transport model was used to evaluate groundwater flow and mixing of fresh and saline groundwater along a cross section of the unconfined upper Floridan aquifer. Results show that between 8% and 15% of the fresh and 30–31% of the saline groundwater penetrates to the depth in the flow system where contact with and dissolution of gypsum is likely. The deeply circulating fresh and saline groundwater returns to the near-surface environment discharging CaSO4-rich water to the coastal area where it mixes with fresh CaHCO3 groundwater, resulting in a prediction of calcite precipitation in the modern mixing zone.