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Introduction
 | SHETRAN has its origins in the SHE (Systeme Hydrologique Europeen), which
was developed by a consortium of the Danish Hydraulic Institute, the British
Institute of Hydrology and SOGREAH, France. |
| SHETRAN (the name derives from SHE-TRANsport) has been developed within
the Water Resource Systems Research Laboratory, School of Civil Engineering
and Geosciences, University of Newcastle upon Tyne. |
| The current version (V4) has been substantially changed from the original
SHE model, with additional components for sediment erosion and transport and
for contaminant transport integrated into the system. |
| The overland-channel (OC) flow component numerical scheme has
also been rewritten as a single integrated solution
for land surface and channel flow. A new three-dimensional variably-saturated
subsurface (VSS) component has been introduced, and a new representation of
near-channel flow and transport has been introduced through the use of mesh
refinement near to river channels. |
| Other recent developments (not included in the download
versions) have included extension of the contaminant component to
represent nitrogen transformations in soils, embedding of a two-dimensional
analytical solution to groundwater flow within the three-dimensional VSS
component to represent flows near abstraction wells, particle tracking codes
for mapping groundwater protection zones, and integration of an existing pipe
network model with the VSS component, which is being used for studies of
minewater pollution and the sustainable management of groundwater resources in
karstic regions. |
SHETRAN Components
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Component |
Processes |
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Water flow
Surface water
flow on ground surface and in stream channels; soil-water and ground-water
flow in unsaturated and saturated zones, including systems of confined,
unconfined, and perched aquifers
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Canopy interception of rainfall
Evaporation and transpiration
Infiltration to subsurface
Surface runoff (overland, overbank, and in channels)
Snowpack development and snowmelt
Storage and 3D flow in variably saturated sub-surface
Combinations of confined, unconfined, and perched aquifers
Transfers between subsurface water and river water
Ground-water seepage discharge
Well abstraction
River augmentation and abstraction
Irrigation |
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Sediment transport
Soil erosion and
multifraction transport on ground surface and in stream channels
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Erosion by raindrop and leaf drip impact and
overland flow
Deposition and storage of sediments on ground surface
Total-load convection with overland flow
Overbank transport
Erosion of river beds and banks
Deposition on river bed
Down-channel advection
Infiltration of fine sediments into river bed |
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Solute transport
Multiple,
reactive solute transport on ground surface and in stream channels and
subsurface
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3D advection with water flow
Advection with sediments
Dispersion
Adsorption to soils, rocks, and sediments
Two-region mobile/immobile effects in soils and rocks
Radioactive decay and decay chains
Deposition from atmosphere
Point or distributed surface or subsurface sources
Erosion of contaminated soils
Deposition of contaminated sediments
Plant uptake and recycling (simple representation only)
Exchanges between river water and river bed |
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