Precipitation-Runoff Modeling System
PRMS is a modular-design, deterministic, distributed-parameter modeling system|
developed to evaluate the impacts of various combinations of precipitation,
climate, and land use on streamflow, sediment yields, and general basin
hydrology. Basin response to normal and extreme rainfall and snow melt can be
simulated to evaluate changes in water-balance relationships, flow regimes,
flood peaks and volumes, soil-water relationships, sediment yields, and
ground-water recharge. Parameter-optimization and sensitivity analysis
capabilities are provided to fit selected model parameters and evaluate their
individual and joint effects on model output. The modular design provides a
flexible framework for continued model-system enhancement and
hydrologic-modeling research and development.
A watershed is divided into subunits based on such basin characteristics as
slope, aspect, elevation, vegetation type, soil type, land use, and
precipitation distribution. Two levels of partitioning are available. The
first divides the basin into homogeneous response units (HRU) based on the
basin characteristics. Water and energy balances are computed daily for each
HRU. The sum of the responses of all HRU's, weighted on a unit-area basis,
produces the daily system response and streamflow for a basin. A second level
of partitioning is available for storm hydrograph simulation. The watershed is
conceptualized as a series of interconnected flow planes and channel segments.
Surface runoff is routed over the flow planes into the channel segments;
channel flow is routed through the watershed channel system. An HRU can be
considered the equivalent of a flow plane or it can be delineated into a number
of flow planes.
[Summary provided by the USGS.]
ISO Topic Category
IMAGERY/BASE MAPS/EARTH COVER
U.S. GEOLOGICAL SURVEY
h2osoft at usgs.gov
Hydrologic Analysis Software Support Program
437 National Center
Province or State:
Tyler.B.Stevens at nasa.gov
NASA Goddard Space Flight Center
Global Change Master Directory
Province or State:
Carey, W.P., and Simon, A., 1984, Physical basis and potential estimation
techniques for soil erosion parameters in the Precipitation-Runoff Modeling
System (PRMS): U.S. Geological Survey Water-Resources Investigations Report
82-4218, 32 p.
Cary, L.E., 1984, Application of the U.S. Geological Survey's
Precipitation-Runoff Modeling System to the Prairie Dog Creek basin,
Southeastern Montana: U.S. Geological Survey Water- Resources Investigations
Report 84-4178, 98 p.
Kidd, R.E., and Bossong, C.R., 1987, Application of the precipitation-runoff
model in the Warrior Coal Field, Alabama: U.S. Geological Survey Water-Supply
Paper 2036, 42 p.
Kuhn, G., 1989, Application of the U.S. Geological Survey's
Precipitation-Runoff Modeling System to Williams Draw and Bush Draw basins,
Jackson County, Colorado: U.S. Geological Survey Water-Resources
Investigations Report 88-4013, 38 p.
Norris, J.M., and Parker, R.S., 1985, Calibration procedure for a daily flow
model of small watersheds with snowmelt runoff in the Green River coal region
of Colorado: U.S. Geological Survey Water-Resources Investigations Report
83-4263, 32 p.
Parker, R.S., and Norris, J.M., 1989, Simulation of streamflow in small
drainage basins in the southern Yampa River Basin, Colorado: U.S. Geological
Survey Water-Resources Investigations Report 88-4071, 47 p.
Puente, C., and Atkins, J.T., 1989, Simulation of rainfall-runoff response in
mined and unmined watersheds in coal areas of West Virginia: U.S. Geological
Survey Water-Supply Paper 2298, 48 p.
Scott, A.G., 1984, Analysis of characteristics of simulated flows from small
surface-mined and undisturbed Appalachian watersheds in the Tug Fork basin of
Kentucky, Virginia, and West Virginia: U.S. Geological Survey Water-Resources
Investigations Report 84-4151, 169 p.
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