Spatiotemporal estimation of fresh submarine groundwater discharge across the coastal shorelines of Oahu Island, Hawaii

IF 2.3 Q3 ENVIRONMENTAL SCIENCES
K. A. Ghazal, O. T. Leta, H. Dulai
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引用次数: 0

Abstract

The integrated hydrological model is a powerful tool that is used to assess the temporal distribution of fresh groundwater discharge especially in coastal areas. The coastal regions of Hawaii are examples of crucial natural resources for the Hawaiian economy and general ecological health. To fully comprehend the intricate interactions between coastal hydrology processes and ecosystems, it is necessary to evaluate the fresh submarine groundwater discharge (FSGD) at the Heeia shoreline using an integrated hydrological modeling technique. Under steady-state settings, the results showed that the present daily average of FSGD is around 0.43 m3/days across 1 m of the shoreline. However, we showed that the FSGD values were considerably impacted by climate change, groundwater head of the coastal aquifer, recharge rate, and sea level rise, particularly by the end of the 21st century. The post-development FSGD fluxes were 1.5–3.5 times greater than the freshwater transported by the Heeia stream, demonstrating the considerable contribution of the FSGD to the coastal zones of Heeia. The results also showed an exponential association between the FSGD and the groundwater level for the coastal unconfined aquifer.
夏威夷瓦胡岛沿海岸线新鲜海底地下水排放的时空估算
综合水文模型是一个强大的工具,用于评估淡水地下水排放的时间分布,特别是在沿海地区。夏威夷沿海地区是夏威夷经济和总体生态健康的重要自然资源的例子。为了充分理解沿海水文过程和生态系统之间的复杂相互作用,有必要使用综合水文建模技术评估Heeia海岸线的淡水海底地下水排放量。在稳态设置下,结果显示,目前1米海岸线的FSGD日平均值约为0.43 m3/天。然而,我们表明,FSGD值受到气候变化、海岸含水层地下水水头、补给率和海平面上升的显著影响,尤其是到21世纪末。开发后的FSGD通量是Heeia河输送淡水的1.5–3.5倍,表明FSGD对Heeia海岸带的巨大贡献。结果还表明,海岸无侧限含水层的FSGD与地下水位之间存在指数相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Blue-Green Systems
Blue-Green Systems Multiple-
CiteScore
8.70
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