Print Email Facebook Twitter Long term pressure gradients along the Belgian and Dutch coast Title Long term pressure gradients along the Belgian and Dutch coast Author Verlaan, P.A.J. Groenendijk, F.C. Corporate name Rijkswaterstaat Project MaST*G8M Date 1993-09-01 Abstract The aim of the investigation is to quantify the long shore and cross shore Sea Surface Slope (SSS) along the Dutch and Belgian coast. We have to pay particular attention to the influence of the river Rhine, the windeffect, the seasonal influence and finally the effect of Dover Strait on the Mean Sea Level. Furthermore, these investigations provide an improved view of the Sea Surface Slope and can be important for the calibration of models. The Mean Sea Level and Sea Surface Slope can be derived from waterlevel recordings. CONCLUSIONS 1. A clear relation between the longshore SSS and the windvector is found. The longshore SSS reaches its maximum positive value during north-easterly winds and its maximum negative value during a westerly wind. In case of a strong northeasterly wind, a state of equilibrium between the SSS and the wind stress is almost established. 2. In the absence of any wind, only a small positive (increasing sea level towards the north) longshore SSS remains (2.10^-8 - 8.10^-8 m/m) if the water level recordings of all coastal stations are taken into account. The influence of the river Rhine on this longshore SSS can be neglected. 3. The longshore SSS is always negative along the Belgian coast except for strong north-easterly winds. This SSS is generated by a structural difference in MSL between the southern North Sea and the English Channel. This negative SSS amounts up to 1.10^-6 m/m. 4. The cross shore SSS between Meetpost Noordwijk and the coast reaches at high windspeeds its maximum during an on-shore directed wind. At a lower windspeed, on the other hand, the cross shore SSS reaches its maximum during a south-southwesterly wind. In general, the cross shore SSS becomes increasingly more positive with an increasing Rhine discharge. Subject sea surface slopeDutch coastBelgian coastcoast slopepressure gradientswindeffect Classification TLN1000TLN200400 To reference this document use: http://resolver.tudelft.nl/uuid:a6485929-32b1-4a62-ba71-57214ecaff39 Publisher Rijkswaterstaat, RIKZ Source DGW-93.045 Part of collection Hydraulic Engineering Reports Document type report Rights (c) 1993 Rijkswaterstaat Files PDF Verlaan_Groenendijk1993.pdf 6.71 MB Close viewer /islandora/object/uuid:a6485929-32b1-4a62-ba71-57214ecaff39/datastream/OBJ/view