HR: 17:30h
AN: H24C-07    [Abstracts]
TI: Estimating Hydraulic Properties for Hawaiian Aquifers Using Aquifer Tests and Tidal Responses
AU: * Rotzoll, K
EM: kolja@hawaii.edu
AU: El-Kadi, A I
EM: elkadi@hawaii.edu
AF: Dept of Geology and Geophysics and Water Resources Research Center, University of Hawaii, 1680 East-West Road University of Hawaii , Honolulu, HI 96822 United States
AB: In the last 30 years the population of the island of Maui, Hawaii, has significantly increased and so has the ground-water demand. To ensure prudent management of the ground-water resources, an improved understanding of ground-water flow systems is needed. At present, no large-scale estimation of the aquifer properties has been completed for Maui. Ground-water flow and chemical transport depends highly on aquifer characteristics such as storage properties and hydraulic conductivity or transmissivity. The suitability of several methods is examined for a number of Hawaiian aquifers. Seven analytical methods using constant and variable-rate withdrawals in a single well provide an estimate of hydraulic conductivity and transmissivity for over 100 wells in central Maui. The spatial distribution permits to form regional clusters of similar hydraulic conductivity. The response of the harmonic ocean tide signal in several wells in the aquifer is investigated. Analytical methods and numerical modeling allow estimating aquifer diffusivity. Results of this analysis are in general agreement with typical values for confined and unconfined aquifers in central Maui. The results of this study will provide information needed to build a numerical ground-water flow model for central Maui in order to estimate ground-water availability.
DE: 1829 Groundwater hydrology
DE: 1846 Model calibration (3333)
DE: 1872 Time series analysis (3270, 4277, 4475)
DE: 1884 Water supply
SC: Hydrology [H]
MN: Fall Meeting 2005