Assessment of groundwater quality using DEA and AHP: a case study in the Sereflikochisar region in Turkey

Assessment of groundwater quality using DEA and AHP: a case study in the Sereflikochisar region in Turkey

This study investigated the spatial distribution of groundwater quality in Sereflikochisar Basin, in the Central Anatolian region of Turkey using different hydrochemical, statistical, and geostatistical methods. A total of 51 groundwater samples were collected from the observation wells in the study...

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Bibliographic Details
Published in:Environmental monitoring and assessment Vol. 188; no. 4; p. 258
Main Authors: Kavurmaci, Murat, Üstün, A. Korkut
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-04-2016
Springer Nature B.V
Subjects:
Aquifers
Atmospheric Protection/Air Quality Control/Air Pollution
basins
Case studies
Data envelopment analysis
Decision making
drinking
Drinking water
Earth and Environmental Science
Ecology
Ecotoxicology
Environment
Environmental Management
Environmental monitoring
Environmental Monitoring - methods
Freshwater resources
Geographic information systems
Geomorphology
geostatistics
Groundwater
Groundwater - chemistry
Hierarchies
Irrigation
kriging
lakes
Methods
Monitoring/Environmental Analysis
Observation wells
Researchers
River networks
Salt lakes
sodium bicarbonate
Sodium chloride
Spatial Analysis
Spatial distribution
Turkey
Water analysis
Water Pollutants, Chemical - analysis
Water Pollution, Chemical - statistics & numerical data
Water quality
Water sampling
wells
Turkey (country)
Turkey
Groundwater quality
Turkey
Analytic hierarchy process
Geostatistics
Data envelopment analysis
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Summary:This study investigated the spatial distribution of groundwater quality in Sereflikochisar Basin, in the Central Anatolian region of Turkey using different hydrochemical, statistical, and geostatistical methods. A total of 51 groundwater samples were collected from the observation wells in the study area to evaluate the characteristics of the groundwater quality. As a relatively simple and practical method, a groundwater quality index (GWQI) was developed to evaluate the overall groundwater quality. In this process, complex decision-making techniques such as analytic hierarchy process (AHP) and data envelopment analysis (DEA) were used. Based on these models, two new indices (A-GWQI and D-GWQI) were proposed. According to the D-GWQI score (from 0.6 to 1), water quality was classified in four categories as unsuitable (0.6–0.7), permissible (0.7–0.8), good (0.8–0.9), and excellent (0.9–1). The spatial distribution maps of the groundwater quality were created using the Kriging method. For each map, seven different semivariogram models were tested and the best-fitted model was chosen based on their root mean square standardized error. These maps showed that the areas with high groundwater quality were in the eastern and southern parts of the study area where the D-GWQI scores were greater than 0.8. Depending on the distance from the Salt Lake, the characteristics of groundwater changed from NaCl to NaHCO₃ and CaHCO₃ facies. This study shows how to determine the spatial distribution of the groundwater quality and identify the impact of salt lakes on the groundwater quality in inland aquifers. The findings of this study can be applied to ensure the quality of groundwater used for drinking and irrigation purposes in the study area.
Bibliography:http://dx.doi.org/10.1007/s10661-016-5259-6
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-016-5259-6