| Abstract: | A three-dimensional electric-analog model of the Long Island, NY , groundwater system constructed by the U.S. Geological Survey in the early 1970 ‘s was used as the basis for developing a digital, three-dimensional finite-difference model. The digital model was needed to provide faster modifications and more rapid solutions to water-management questions. Results generated by the two models are depicted as potentiometric-surface maps of the upper glacial and Magothy aquifers. Results compare favorably for all parts of Long Island except the northwestern part, where hydrologic discontinuities are most prevalent and which the two models represent somewhat differently. The mathematical and hydrologic principles used in development of ground-water models, and the procedures for calibration and acceptance, are presented in nontechnical terms. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 29319 |
| Citation Author: | Reilly, Thomas E.; Harbaugh, Arlen W. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 40 p. :ill., maps ;29 cm. |
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| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 80-14 |
| Citation Search Results Text: | A comparison of analog and digital modeling techniques for simulating three-dimensional ground-water flow on Long Island, New York; 1980; WRI; 80-14; Reilly, Thomas E.; Harbaugh, Arlen W. |
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| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | A comparison of analog and digital modeling techniques for simulating three-dimensional ground-water flow on Long Island, New York; 1980; WRI; 80-14; Reilly, Thomas E.; Harbaugh, Arlen W. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1980/0014/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1980/0014/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
