Premium
Estimation of groundwater recharge parameters by time series analysis
Author(s) -
Naff Richard L.,
Gutjahr Allan L.
Publication year - 1983
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr019i006p01531
Subject(s) - groundwater recharge , precipitation , aquifer , environmental science , groundwater , sensitivity (control systems) , nonlinear system , soil science , series (stratigraphy) , gaussian , mathematics , hydrology (agriculture) , geology , meteorology , chemistry , geotechnical engineering , engineering , physics , paleontology , quantum mechanics , electronic engineering , computational chemistry
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.