Abstract

Knowledge of the processes governing salt intrusion in estuaries is important since it influences the eco-environment of estuaries as well as its water resource potential in many ways. The aim of this paper is to test the effectiveness of the new 1-D thermodynamic salt intrusion equation proposed by Zhang and Savenije (i.e., is an extreme power theory for the mixing of saline sea water and fresh river water in estuaries); and existing salt intrusion model (i.e., Van der Burgh method) at two previously unsurveyed estuaries in India and Morocco. To successfully perform the analysis using the 1-D models, real time data is required. Field measurements during infrequent astronomical event were recorded along the estuaries (31/01/2018 for Ashtamudi estuary (India); and during 31/01/2018 for Bouregreg estuary (Morocco)). Shape (geometry) and salinity analyses were performed on each of the estuaries. The results obtained show good agreement between the simulated and observed salinity distribution in the estuaries with high R² values. Finally, by utilizing the new predictive equation, we can estimate the minimum amount of river discharge needed, and the maximum allowable depth for dredging, to prevent saline water intruding further into the areas studied. Thus, the simple and effective approach presented in this study can describe the current state of salt intrusion in India and Morocco estuaries, and be used for future development.

摘要

了解控制河口盐分入侵的过程很重要，因为它在许多方面影响河口的生态环境及其水资源潜力。本文的目的是检验张和萨维尼耶提出的新一维热力学盐入侵方程（即河口咸海水和淡水混合的极幂理论）的有效性；和现有的盐侵入模型（即范德堡方法）在印度和摩洛哥的两个以前未经调查的河口。要使用一维模型成功执行分析，需要实时数据。沿河口记录了罕见天文事件期间的现场测量（31/01/2018 为 Ashtamudi 河口（印度）；31/01/2018 期间为 Bouregreg 河口（摩洛哥））。对每个河口进行了形状（几何形状）和盐度分析。获得的结果表明，高浓度河口的模拟盐度分布与观测到的盐度分布之间具有良好的一致性。R ²值。最后，通过利用新的预测方程，我们可以估计所需的最小河流流量和最大允许疏浚深度，以防止咸水进一步侵入研究区域。因此，本研究中提出的简单有效的方法可以描述印度和摩洛哥河口盐入侵的现状，并用于未来的开发。