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Entropy 2015, 17(4), 1558-1580; doi:10.3390/e17041558

High Recharge Areas in the Choushui River Alluvial Fan (Taiwan) Assessed from Recharge Potential Analysis and Average Storage Variation Indexes

1
Department of Civil Engineering, National Chiao-Tung University, No. 1001, University Road, Hsinchu City 30010, Taiwan
2
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hwa-Lung Yu
Received: 22 May 2014 / Revised: 9 March 2015 / Accepted: 16 March 2015 / Published: 24 March 2015
(This article belongs to the Special Issue Entropy and Space-Time Analysis in Environment and Health)
View Full-Text   |   Download PDF [9219 KB, uploaded 24 March 2015]   |  

Abstract

High recharge areas significantly influence the groundwater quality and quantity in regional groundwater systems. Many studies have applied recharge potential analysis (RPA) to estimate groundwater recharge potential (GRP) and have delineated high recharge areas based on the estimated GRP. However, most of these studies define the RPA parameters with supposition, and this represents a major source of uncertainty for applying RPA. To objectively define the RPA parameter values without supposition, this study proposes a systematic method based on the theory of parameter identification. A surrogate variable, namely the average storage variation (ASV) index, is developed to calibrate the RPA parameters, because of the lack of direct GRP observations. The study results show that the correlations between the ASV indexes and computed GRP values improved from 0.67 before calibration to 0.85 after calibration, thus indicating that the calibrated RPA parameters represent the recharge characteristics of the study area well; these data also highlight how defining the RPA parameters with ASV indexes can help to improve the accuracy. The calibrated RPA parameters were used to estimate the GRP distribution of the study area, and the GRP values were graded into five levels. High and excellent level areas are defined as high recharge areas, which composed 7.92% of the study area. Overall, this study demonstrates that the developed approach can objectively define the RPA parameters and high recharge areas of the Choushui River alluvial fan, and the results should serve as valuable references for the Taiwanese government in their efforts to conserve the groundwater quality and quantity of the study area. View Full-Text
Keywords: high recharge areas; groundwater recharge potential; average storage variation; simulated annealing; geographical information system high recharge areas; groundwater recharge potential; average storage variation; simulated annealing; geographical information system
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tsai, J.-P.; Chen, Y.-W.; Chang, L.-C.; Kuo, Y.-M.; Tu, Y.-H.; Pan, C.-C. High Recharge Areas in the Choushui River Alluvial Fan (Taiwan) Assessed from Recharge Potential Analysis and Average Storage Variation Indexes. Entropy 2015, 17, 1558-1580.

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