Developing an independent, generic, phosphorus modelling component for use with grid-oriented, physically-based distributed catchment models

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Title: Developing an independent, generic, phosphorus modelling component for use with grid-oriented, physically-based distributed catchment models
Authors: Nasr, Ahmed Elssidig
Taskinen, Antti
Bruen, Michael
Permanent link: http://hdl.handle.net/10197/2308
Date: Aug-2003
Abstract: Grid-oriented, physically based catchment models calculate fields of various hydrological variables relevant to phosphorous detachment and transport. These include (i) for surface transport: overland flow depth and flow in the coordinate directions, sediment load, and sediment concentration and (ii) for subsurface transport: soil moisture and hydraulic head at various depths in the soil. These variables can be considered as decoupled from any chemical phosphorous model since phosphorous concentrations, either as dissolved or particulate, do not influence the model calculations of the hydrological fields. Thus the phosphorous concentration calculations can be carried out independently from and after the hydrological calculations. This makes it possible to produce a separate phosphorous modelling component which takes as input the hydrological fields produced by the catchment model and which calculates, at each step the phosphorous concentrations in the flows. This paper summarise the equations and structure of Grid Oriented Phosphorous Component (GOPC) developed for simulating the phosphorus concentrations and loads using the outputs of a fully distributed physical based hydrological model. Also the GOPC performance is illustrated by am example of an experimental catchment (created by the author) subjected to some ideal conditions.
Funding Details: Other funder
Type of material: Conference Publication
Publisher: IWA Publishing
Copyright (published version): IWA Publishing
Keywords: Grid oriented phosphorus component;Phosphorus modelling;Phosphorus transport;Soil phosphorus;Phosphorous component
Subject LCSH: Soils--Phosphorus content
Water--Phosphorus content
Hydrologic models
Language: en
Status of Item: Peer reviewed
Is part of: Diffuse pollution and basin management : proceedings of the 7th IWA International Specialised Conference on Diffuse Pollution and Basin Management, Dublin, Ireland, 17-21st August 2003
Conference Details: Presented at the 7th IWA International Specialised Conference on Diffuse Pollution and Basin Management, Dublin, Ireland, 17-21st August 2003
Appears in Collections:Centre for Water Resources Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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