INCA

A new model has been developed for assessing multiple sources of nitrogen in catchments. The model INCA is process based and uses reaction kinetic equations to simulate the principal mechanisms operating. The model allows for plant uptake, surface and sub-surface pathways and can simulate up to six land uses simultaneously. The model can be applied to catchment as a semi-distributed simulation and has an inbuilt multi-reach structure for river systems. Sources of nitrogen can be from atmospheric deposition, from the terrestrial environment(e.g. agriculture, leakage from forest systems etc.), from urban areas or from direct discharges via sewage or intensive farm units. The model is a daily simulation model and can provide information in the form of time series at key sites, or as profiles down river systems or as statistical distributions.

NitrogenKinetic equationsRiver systemsDaily simulation model
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Contributor

contributed at 2019-10-13

Authorship

Affiliation:  
Water Science and Fellow of St Peter's College, Oxford
Email:  
paul.whitehead@ouce.ox.ac.uk
Homepage:  
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Classification(s)

Geography SubjectPhysical GeographyHydrology

Detailed Description

A new model has been developed for assessing multiple sources of nitrogen in catchments. The model INCA is process based and uses reaction kinetic equations to simulate the principal mechanisms operating. The model allows for plant uptake, surface and sub-surface pathways and can simulate up to six land uses simultaneously. The model can be applied to catchment as a semi-distributed simulation and has an inbuilt multi-reach structure for river systems. Sources of nitrogen can be from atmospheric deposition, from the terrestrial environment(e.g. agriculture, leakage from forest systems etc.), from urban areas or from direct discharges via sewage or intensive farm units. The model is a daily   simulation model and can provide information in the form of time series at key sites, or as profiles down river systems or as statistical distributions.

 

The INCA model has been designed to investigate the fate and distribution of nitrogen in the aquatic and terrestrial environment. The model simulates flow pathways and tracks fluxes of both nitrate-N and ammonium-N in the land phase and riverine phase. The dynamic nature of the model means that the day-to-day variations in flow, N fluxes and concentrations can be investigated following a change in N inputs such as atmospheric deposition, sewage discharges or fertiliser application. INCA has been designed to be easy to use, is fast, and has excellent output graphics. The menu system allows the user to specify the semi-distributed nature of a river basin or catchment, to alter reach lengths, rate coefficients, velocity-flow relationships, land use, temperature, rainfall and nitrogen deposition. 

 

INCA provides the following outputs:

 Daily and annual land use-specific N fluxes for all transformationsrprocesses within the land phase; 

 Daily time series of flows, nitrate-N and ammonium-N concentrations at selected sites along the river; 

 Profiles of flow and nitrogen concentrations along the river at selected times; 

 Cumulative frequency distributions of flowand nitrogen at selected sites; 

 Tables of statistics for all sites.

The model runs on any IBM compatible PC with MSDOS.

How to cite

P.G. Whitehead (2019). INCA, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/7c6216ab-a4e0-455a-bfc2-ef338a7fe271
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Contributor

contributed at 2019-10-13

Authorship

Affiliation:  
Water Science and Fellow of St Peter's College, Oxford
Email:  
paul.whitehead@ouce.ox.ac.uk
Homepage:  
View
Is authorship not correct? Feed back

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