A new, robust and versatile method to solve the hydrological inverse problem has been conceived, developed and thoroughly tested. This method obtains transmissivity values in the form required for commonly-used computer models. By minimization of an objective function that is reduced to retain solely the most important components, the approach is to find a transmissivity distribution and slightly modified head and flux fields. The equations resulting from the objective function are then solved iteratively by successive overrelaxation, starting with a guess value and converging toward a solution. / The method is tested by means of a synthetic application. Transmissivity, head and flux distributions are chosen as functions of space so as to meet the steady-state hydrological equation. The transmissivity is then put aside, and another transmissivity distribution is obtained from the head and flux values at grid points using the inverse method. The true and recovered transmissivities are then compared, with percentage of recovery greater than 90%. Varying initial guesses for transmissivity has very little effect. / The method is applied with success to a portion of the Sand-and-Gravel Aquifer of northwest Florida. Comparison of the results of the application with transmissivity values available from pumping tests shows good agreement. Sensitivity analysis reveals only a reasonable amount of amplification of noise error. / The method's ease of use and its format for the microcomputer make it well-suited for the hydrologist without expertise in inverse methods or extensive computer facilities. Its application to both synthetic and real aquifer situations demonstrates its potential as a practical tool in water resource management. / Source: Dissertation Abstracts International, Volume: 47-06, Section: B, page: 2353. / Thesis (Ph.D.)--The Florida State University, 1986.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_75850 |
| Contributors | CUSHMAN-ROISIN, MARY., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 113 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
Page generated in 0.0017 seconds