intro story Coast / Estuary

Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 




Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems



Message Boards

Oscillations of simulated water level and discharge

Dong Liang, modified 2 Years ago.

Oscillations of simulated water level and discharge

Youngling Posts: 4 Join Date: 11/4/14 Recent Posts

I'm working with a model to simulate water level and outflow discharges of a lake. Upstream boundary was set as daily inflow discharges and downstream boundary was set as daily water level at outlet. I set the time step and output results interval to be 1min and run the model for a year.  Then oscillations were found in the results( as shown in the picture).

I'm asking for help to make the results more smooth. Was the oscilation caused by the time scale of boundary setting?