Soil - Plant - Atmosphere - Water Field & Pond Hydrology

SPAW is a daily hydrologic budget model for agricultural fields and ponds (wetlands, lagoons, ponds and reservoirs). Included are irrigation scheduling and soil nitrogen. Data input and results are graphical screens.

The SPAW (Soil-Plant-Air-Water) computer model simulates the daily hydrologic water budgets of agricultural landscapes by two connected routines, one for farm fields and a second for impoundments such as wetland ponds, lagoons or reservoirs. Climate, soil and vegetation data files for field and pond projects are selected from those prepared and stored with a system of interactive screens. Various combinations of the data files readily represent multiple landscape and ponding variations.

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Soil Water Characteristics - Equationsxlb
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Field	Value
Tags	NP211 soil data ecological assessment soil reports Soil Water Characteristics SPAW
Modified	2023-07-17
Release Date	2017-12-21
Identifier	08a3572a-1295-4bb0-8223-dceeb6c21c4d
Spatial / Geographical Coverage Area	POLYGON ((-531.5625 -83.175427469956, -531.5625 84.802473724335, -164.53125 84.802473724335, -164.53125 -83.175427469956))
Publisher	USDA Agricultural Research Service
Spatial / Geographical Coverage Location	United States
License	U.S. Public Domain
Contact Name	Parry, Rob
Contact Email	Rob.Parry@ars.usda.gov
Public Access Level	Public
Program Code	005:040 - Department of Agriculture - National Research
Bureau Code	005:18 - Agricultural Research Service

Extended Metadata:

Field	Value
Authors	Saxton, Keith (Scopus Author ID)
Peer Reviewed	No
Funding Sources	Agricultural Research Service Natural Resources Conservation Service
Primary Article	Keith E. Saxton, Patrick H. Willey, & Walter J. Rawls. (2006). FIELD AND POND HYDROLOGIC ANALYSES WITH THE SPAW MODEL. In 2006 Portland, Oregon, July 9-12, 2006. American Society of Agricultural and Biological Engineers. https://doi.org/10.13031/2013.20709
Related Articles	Saxton, K., & Willey, P. (2005). The SPAW Model for Agricultural Field and Pond Hydrologic Simulation. In V. Singh & D. Frevert, Mathematical Modeling of Watershed Hydrology (Chapter 17, pp. 1-37). CRC Press LLC. Retrieved from https://hrsl.ba.ars.usda.gov/SPAW/SPAW%20Book%20Chapter.pdf Saxton, K. E., & Rawls, W. J. (2006). Soil Water Characteristic Estimates by Texture and Organic Matter for Hydrologic Solutions. Soil Science Society of America Journal, 70(5), 1569-1578. https://doi.org/10.2136/sssaj2005.0117
Dataset DOI (digital object identifier)	10.15482/USDA.ADC/1529226
Product Type	Model
Related Content	SPAW Soil Water Characteristics - Hydrology and Water Budgeting SPAW main page SPAW software download page

Field	Value
ISO Topic(s)	biota climatologyMeteorologyAtmosphere environment farming geoscientificInformation inlandWaters
State or Territory	United States Of America
National Agricultural Library Thesaurus Term	water balance models ponds wetlands irrigation scheduling soil nitrogen computer software computer simulation agricultural land farms climate vegetation landscapes rain temperature evaporation soil profiles annuals irrigation water budget runoff evapotranspiration soil water wastewater water supply crop production Agricultural Research Service Washington (state) drainage Natural Resources Conservation Service Oregon agricultural watersheds stream flow animal housing drawdown pumps water table waterfowl salinity chemistry screening soil surveys United States agricultural management simulation models conservation practices soil morphology algorithms soil classification soil matric potential water holding capacity soil texture gravel soil salinity organic matter
Ag Data Commons Keywords	Agroecosystems & Environment Agroecosystems & Environment Soil Classification Agroecosystems & Environment Water Hydrology Agroecosystems & Environment Soil Biogeochemistry Agroecosystems & Environment Soil Physical properties Agroecosystems & Environment Soil Agroecosystems & Environment Water

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