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. 
 

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

 

 

Message Boards

RadSurf file in BLOOM

AA
Amelia Araujo, modified 2 Years ago.

RadSurf file in BLOOM

Youngling Posts: 13 Join Date: 7/7/15 Recent Posts

Hi,

I want to impose the RadSurf in my BLOOM simulation as a time series. Following the advice below, I have prepared a daily averaged file:

https://oss.deltares.nl/web/delft3d/coast-/-estuary/-/message_boards/message/622519

However, reading the manual, I still have doubts about what I should provide in this file. In page 163 of the D-Water_Quality_Processes_Technical_Reference_Manual , it says:

“The light intensity at the water surface RadSurf is the total visible light intensity (solar radiation) or the photosynthetic active light intensity corrected for reflection”.

The solar irradiance contains wavelengths other than the visible spectrum (NIR, UV), so I would say that according to this sentence I would need to correct my net short wave Radiation data to get the energy in the range 400-700nm, which is the visible and also approx. the PAR.

But, if I read the last sentence of directives for use in the same page of the manual: “Phytoplankton module BLOOM uses the daily average radiation. In its standard setting it uses total visible light and carries out corrections for both reflection and photo-synthetic fraction”

I understand that the correction for PAR is done automatically in the code and that I just need to provide the net shortwave radiation. Am I right?? This is a bit confusing for me.

Thanks for your clarifications.

 

Amelia