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ARS,
National Sedimentation Laboratory,
Watershed Physical Processes Research Unit
AGNPS
other related water quality models
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overview
The AnnAGNPS computer model not only predicts pollutant loadings (PL)
throughout the stream network, but is also a nexus for certain other
computer models that are useful for water quality analysis and their
effects on aquatic resources. AnnAGNPS may be used to analyze PL’s for
free-flowing stream systems involving sediment and chemical movement,
but the most insidious and pervasive PL’s that effect aquatic
resources are water temperature & fine sediments. The following
computer models may be used with AnnAGNPS to study some of these topics.
Hydrologic Unit / Water Quality Model (HU/WQ)
Abstract:
HU/WQ is a full-service, GIS-support computer model
designed and developed to prepare input for PL computer models and
display output from these models. While HU/WQ does not currently work
directly with AnnAGNPS, it does work with AGNPS. NRCS plans to revise HU/WQ
to work with AnnAGNPS. The following connection to the HU/WQ home page
will provide the surfer with ample information as to facts,
applicability, status, & accessibility of HU/WQ software &
documentation.
Web Site Connection:
HU/WQ
Stream Network Temperature Model (SNTEMP)
Abstract:
The stream network temperature model (SNTEMP)
predicts the minimum, maximum, & average daily water temperatures
throughout a stream network. Its input requirements include the daily
water discharge that is calculated and produced as output by AnnAGNPS.
Most of the remaining SNTEMP input is duplicated in the input to
AnnAGNPS. Obviously, the same climate data & stream network system,
including the hydraulic geometry, used for AnnAGNPS should also be used
for SNTEMP. The only significant additional input to SNTEMP would be any
local topographic influences & riparian vegetation (trees); i.e.,
physical dimensions that produce important shade on the stream’s water
surface. SNTEMP is fully supported by the USGS Biological Resources
Division including software, documentation, training, and even some
specialized subsidiary computer programs.
Web Site Connection:
SNTEMP
Sediment Intrusion & Dissolved Oxygen Model (SIDO)
Abstract:
The sediment intrusion & dissolved oxygen (SIDO)
model predicts the daily sediment accumulation & DO status within a
salmonid redd with special attention to the egg zone. In addition to
local detailed hydraulic geometry for the redd and certain biological
specifications particular to the specific salmonid species, SIDO
requires daily water, sediment, and water temperature data that is
output from AnnAGNPS & SNTEMP. The following connection to the SIDO
home page will provide the surfer with full access to SIDO’s software
& complete documentation.
Web Site Connection:
SIDO
Conservation Channel Evolution and Pollutant Transport System Model (CONCEPTS)
Web Site Connection:
CONCEPTS
Stream Network Watershed Scale Model (CCHE1D)
Web Site Connection:
CCHE1D
NRCS Hydraulics and Hydrology Tools and Models
Web Site Connection:
NRCS H & H
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