Availability of coastal groundwater discharge as an alternative water resource in a large-scale reclaimed land, Korea

Lee, Bu-Sung; Song, Sung‐Ho; Kim, Jin Sung; Um, Jae Yeon; Nam, Kyoungphile

doi:10.1007/s12665-013-2558-x

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…Park et al (2012) use Theis' solution for a fissured aquifer with freshwater and saltwater. Chachadi and Gawas (2012), Sabtan and Shehata (2003), Mohanty et al (2012), and Lee et al (2014) also apply Theis' solution in detrital coastal aquifers. Barlow et al (1996) and Ni et al (2011) noticed a tidal effect in their drawdown curves but did not consider it for evaluating T and S. Keith et al (2006) and Mastrocicco et al (2013) apply the Cooper-Jacob method to interpret pumping tests in detrital coastal aquifers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Analytical Methods to Study Aquifer Properties with Pumping Tests in Coastal Aquifers with Numerical Modelling (Motril-Salobreña Aquifer)

Calvache

Sánchez-Úbeda

Duque

et al. 2015

Water Resour Manage

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Two pumping tests were performed in the unconfined Motril-Salobreña detrital aquifer in a 250 m-deep well 300 m from the coastline containing both freshwater and saltwater. It is an artesian well as it is in the discharge zone of this coastal aquifer. The two observation wells where the drawdowns are measured record the influence of tidal fluctuations, and the well lithological columns reveal high vertical heterogeneity in the aquifer. The Theis and Cooper-Jacob approaches give average transmissivity (T) and storage coefficient (S) values of 1460 m 2 /d and 0.027, respectively. Other analytical solutions, modified to be more accurate in the boundary conditions found in coastal aquifers, provide similar T values to those found with the Theis and Cooper-Jacob methods, but give very different S values or could not estimate them. Numerical modelling in a synthetic model was applied to analyse the sensitivity of the Theis and Cooper-Jacob approaches to the usual boundary conditions in coastal aquifers. The T and S values calculated from the numerical modelling drawdowns indicate that the regional flow, variable pumping flows, and tidal effect produce an error of under 10 % compared to results obtained with classic methods. Fluids of different density (freshwater and saltwater) cause an error of 20 % in estimating T and of over 100 % in calculating S. The factor most affecting T and S results in the pumping test interpretation is vertical heterogeneity in sediments, which can produce errors of over 100 % in both parameters.

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