Articles | Volume 21, issue 7
Research article
04 Jul 2017
Research article |  | 04 Jul 2017

The physics behind Van der Burgh's empirical equation, providing a new predictive equation for salinity intrusion in estuaries

Zhilin Zhang and Hubert H. G. Savenije


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Short summary
An estuary is where fresh water rivers meet the salty open sea. This mixture of salty fresh water leads to a varying water quality. There a model works well showing how far the salty water can travel, with an empirical parameter that needs to be calibrated every time. This paper provides a possible solution for this parameter to make the model predictive. Also, the model was improved by considering 2-D exchange flow. This new model was supported by observations in 18 estuaries around the world.