Abstract
Large-scale coastal reclamation at Pulau Tekong Singapore, which is situated at the confluence of Johor River estuary and Straits of Johor, inevitably alters the local hydrodynamics. Meanwhile, in order to prevent saline intrusion from reaching the Johor River Waterworks (JRWW) operated by PUB Singapore, the government of Malaysia has recently proposed to build a tidal barrage at Kota Tinggi across Johor River. The scheme is expected to reduce the need of salinity flushing from the Linggiu Dam further upstream, thus lowering the average riverine discharge into Johor River estuary. The coupled effect of the above is likely to affect the advection and diffusion of pollutants in Johor River estuary. In the present study, we simulate the flow field in Johor River estuary using a set of hyperbolic shallow water equations on an adaptive quadtree grid system. Our objective is to understand the environmental flow in the study area after the completion of the above-proposed developments.
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