Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
Development of a conceptual reservoir-type model for salinity simulation along the tidal river
In: Journal of Hydrology. Elsevier: Tokyo; Oxford; New York; Lausanne; Shannon; Amsterdam. ISSN 0022-1694; e-ISSN 1879-2707, meer
|  |
| Author keywords |
Seawater intrusion;Conceptual model;High salinity;mike11;Scheldt estuary;intrusion;risk |
| Auteurs | | Top |
- Zhu, B.
- Willems, P., meer
|
|
|
| Abstract |
Increasing saltwater intrusion in estuaries driven by climate change and human activities necessitates efficient predictive tools, yet high-resolution models remain computationally prohibitive for large-scale applications. This study presents a conceptual reservoir-type model (CM), which is a simplification of the full hydrodynamic 1D MIKE11 framework, designed to balance accuracy and computational efficiency. The CM comprises two modules: (1) a hydrodynamic module resolving discharge (Q) and water level (WL) via sequential reservoir calculations, and (2) an advection-dispersion module simulating salinity (S) dynamics using the finite difference method. Validated for the Scheldt Estuary against MIKE11 simulations, the CM achieves Nash-Sutcliffe Efficiency (NSE) > 0.9 for WL, > 0.8 for Q, and > 0.85 for S, effectively capturing spatial gradients (e.g., downstream-to-upstream decline), tidal variability, and abrupt tributary impacts (e.g., Rupel River). Despite the coarser spatial resolution ( 6,000 m vs. MIKE11's 300 m for S node spacing), the CM demonstrates the capacity to accurately simulate S dynamics, with slight overestimations, particularly excelling in simulating high 95th percentile salinities. Moreover, the CM reliably estimates S at non-aligned spatial nodes with simple interpolation, as demonstrated through validation against field data. After scenario testing, its high computational efficiency and spatial flexibility (enabling rapid sub-reach adaptation without grid reconfiguration) support scalable and robust applications like zoning management for saltwater monitoring under climate change. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
