| Abstract: | A deep percolation model, which operates on a daily basis, was developed to estimate long-term average groundwater recharge from precipitation. It has been designed primarily to simulate recharge in large areas with variable weather, soils, and land uses, but it can also be used at any scale. The physical and mathematical concepts of the deep percolation model, its subroutines and data requirements, and input data sequence and formats are documented. The physical processes simulated are soil moisture accumulation, evaporation from bare soil, plant transpiration, surface water runoff, snow accumulation and melt, and accumulation and evaporation of intercepted precipitation. The minimum data sets for the operation of the model are daily values of precipitation and maximum and minimum air temperature, soil thickness and available water capacity, soil texture, and land use. Long-term average annual precipitation, actual daily stream discharge, monthly estimates of base flow, Soil Conservation Service surface runoff curve numbers, land surface altitude-slope-aspect, and temperature lapse rates are optional. The program is written in the FORTRAN 77 language with no enhancements and should run on most computer systems without modifications. Documentation has been prepared so that program modifications may be made for inclusions of additional physical processes or deletion of ones not considered important. (Author ‘s abstract) |
| Genre: | USGS Numbered Series |
| ProdID: | 12607 |
| Citation Author: | Bauer, H. H.; Vaccaro, J. J. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | iv, 180 p. :ill., map ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 86-536 |
| Citation Search Results Text: | Documentation of a deep percolation model for estimating ground-water recharge; 1987; OFR; 86-536; Bauer, H. H.; Vaccaro, J. J. |
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| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Documentation of a deep percolation model for estimating ground-water recharge; 1987; OFR; 86-536; Bauer, H. H.; Vaccaro, J. J. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1986/0536/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1986/0536/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
