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Environmental Geology

, Volume 50, Issue 1, pp 101–121 | Cite as

Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms

  • Ming-Sheng Yeh
  • Yu-Pin Lin
  • Liang-Cheng Chang
Original Article

Abstract

The optimal selection of monitoring wells is a major task in designing an information-effective groundwater quality monitoring network which can provide sufficient and not redundant information of monitoring variables for delineating spatial distribution or variations of monitoring variables. This study develops a design approach for an optimal multivariate geostatistical groundwater quality network by proposing a network system to identify groundwater quality spatial variations by using factorial kriging with genetic algorithm. The proposed approach is applied in designing a groundwater quality monitoring network for nine variables (EC, TDS, Cl, Na, Ca, Mg, SO 4 2− , Mn and Fe) in the Pingtung Plain in Taiwan. The spatial structure results show that the variograms and cross-variograms of the nine variables can be modeled in two spatial structures: a Gaussian model with ranges 28.5 km and a spherical model with 40 km for short and long spatial scale variations, respectively. Moreover, the nine variables can be grouped into two major components for both short and long scales. The proposed optimal monitoring design model successfully obtains different optimal network systems for delineating spatial variations of the nine groundwater quality variables by using 20, 25 and 30 monitoring wells in both short scale (28.5 km) and long scale (40 km). Finally, the study confirms that the proposed model can design an optimal groundwater monitoring network that not only considers multiple groundwater quality variables but also monitors variations of monitoring variables at various spatial scales in the study area.

Keywords

Groundwater quality Monitoring network design Factorial kriging Optimization Spatial Variation Pingtung plain Taiwan 

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Civil EngineeringNational Chiao Tung UniversityHsinchuTaiwan
  2. 2.Department of Bioenvironmental Systems EngineeringNational Taiwan UniversityTaipeiTaiwan

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