Zonal management of multi-purpose use of water from arsenic-affected aquifers by using a multi-variable indicator kriging approach
Resource
Journal of Hydrology 359 (3-4): 260-273
Journal
Journal of Hydrology
Journal Volume
359
Journal Issue
3-4
Pages
260-273
Date Issued
2008
Author(s)
Abstract
This work presented a probability map of groundwater resources for multi-purpose uses (irrigation, aquaculture and drinking water) of arsenic (As)-affected aquifers in the Lanyang Plain, northeastern Taiwan. The assessment was based on As and other several compounds and factors that adversely affect water-quality. Multiple-variable indicator kriging (MVIK) was adopted to evaluate numerous hydrochemical parameters for the three water-quality standards in Taiwan. Hydrochemical parameters of groundwater were classified into four main hazard categories - saline hazard, nitrogen hazard, As hazard and Fe-Mn hazard. Safe and potentially hazardous groundwater regions for multi-purpose use were delineated according to estimated probabilities by using MVIK. Analytical results for MVIK critical probability of >0.5 demonstrate that the proximal-fan, partial central distal-fan and mid-fan, and northern distal-fan aquifers complying with most water-quality standards are optimal zones for extracting safe groundwater. Notably, the deep aquifer has a high hazard rating and is less safe than the shallow aquifer. The Fe-Mn hazard in Lanyang Plain groundwater presents in most aquifers, and is partially combined with other hazards, such as the nitrogen hazard and the As hazard. A zonal management plan based on safe groundwater use is formulated to help local governments develop groundwater resources in the Lanyang Plain. © 2008 Elsevier B.V. All rights reserved.
Subjects
Groundwater quality; Hazard; Multi-purpose; Multiple-variable indicator kriging; Uncertainty
SDGs
Other Subjects
Aquaculture; Aquifers; Arsenic; Arsenic compounds; Chlorine compounds; Extraction; Groundwater; Hazards; Hydrogeology; Landforms; Manganese; Manganese compounds; Nitrogen; Nonmetals; Parameter estimation; Potable water; Probability; Quality control; Random processes; Reusability; Risk assessment; Standards; Underground reservoirs; Water management; Analytical results; Drinking water; Estimated probabilities; Groundwater quality; Groundwater use; Hazard; Hazard rating; Hydrochemical parameters; Indicator kriging; Lanyang plain; Local governments; Management planning; Multi-purpose; Multiple-variable indicator kriging; Northeastern Taiwan; Quality standards; Shallow aquifers; Uncertainty; Groundwater resources; aquifer; arsenic; assessment method; classification; hydrochemistry; kriging; mapping method; probability; uncertainty analysis; water quality; Asia; Eurasia; Far East; Lanyang Plain; Taiwan
Type
journal article
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