Estimation of groundwater recharge parameters by time series analysis
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Abstract
A model is proposed that relates water level fluctuations in a Dupuit aquifer to effective precipitaton at the top of the unsaturated zone. Effective precipitation, defined herein as that portion of precipitation which becomes recharge, is related to precipitation measured in a nearby gage by a two-parameter function. A second-order stationary assumption is used to connect the spectra of effective precipitation and water level fluctuations. Measured precipitation is assumed to be Gaussian, in order to develop a transfer function that relates the spectra of measured and effective precipitation. A nonlinear least squares technique is proposed for estimating parameters of the effective-precipitation function. Although sensitivity analyses indicate difficulties that may be encountered in the estimation procedure, the methods developed did yield convergent estimates for two case studies.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Estimation of groundwater recharge parameters by time series analysis |
| Series title | Water Resources Research |
| DOI | 10.1029/WR019i006p01531 |
| Volume | 19 |
| Issue | 6 |
| Year Published | 1983 |
| Language | English |
| Publisher | American Geophysical Union |
| Description | 16 p. |
| First page | 1531 |
| Last page | 1546 |
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