A Proposal for the Number of Investigation Wells for Optimal Radial Collector Well Design

Myoung-Rak Choi; Gyoo-Bum Kim

doi:10.7857/JSGE.2020.25.2.001

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2020 Vol.25, Issue 2 Next Page

A Proposal for the Number of Investigation Wells for Optimal Radial Collector Well Design 방사형 집수정의 적정 설계를 위한 조사 물량 제안

30 June 2020. pp. 1-8

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Abstract

In general, the estimation of optimum yield for the radial collector well is determined by the empirical equation or numerical modeling, in which hydraulic conductivity of the aquifer is a main influence factor. Hydraulic conductivities of 164 soil samples collected from boreholes and horizontal wells (average length: about 50 m) installed during well construction in the Anseong stream were drawn in two-dimensional map by the Kriging method and utilized in this study. Hydraulic conductivity analyses by Representative Elementary Count (REC) indicated the average hydraulic conductivity is similar to that of the pumping test when the number of samples reaches about 1,000, which correspond to 1,000 m². Pumping test was also conducted at 1 pumping well and 13 observation wells to estimate hydraulic conductivities at each observation well. REC analysis indicated that the average value of hydraulic conductivity calculated from at least four observation wells is valid as a representative value. The overall result suggested that multiple observation wells or multiple pumping-observation well systems that are located within the range of horizontal wells should be utilized to properly estimate the representative hydraulic conductivity values and the yield of a radial collector well.

Keywords

Radial collector well

Representative Elementary Count

Hydraulic conductivity

Investigation well

References

Carman, P.C., 1956, Flow of gases through porous media. But-terworths Scientific Publications, London.

Choi, M.R., Lee, H.J., and Kim, G.B., 2019, Relationship between groundwater level changes and aquifer characteristics during pumping a radial collector well, J. Eng. Geol., 29(3), 279-288.

Hong, S.W., Song, S.H., An, J.G., and Kim, J.S., 2016, Agricul-tural Radial Collector Wells in South Korea and Sustainability, J. Eng. Geol., 26(3), 331-337

10.9720/kseg.2016.3.331

Katagiri, J., Kimura, S., and Noda, S., 2020, Significance of shape factor on permeability anisotropy of sand: representative elementary volume study for pore-scale analysis. Acta Geotech-nica. https://doi.org/10.1007/s11440-020-00912-0.

10.1007/s11440-020-00912-0

Kim, G.B., Jeong, J.H., and Lee, S.H., 2014, Evaluation of groundwater yield from riverbank filtration system considering water levels’ increase in the middle Nakdong River. J. Geo. Soc. Korea, 50(3), 401-407.

10.14770/jgsk.2014.50.3.401

Kim, G.B., Lee, H.J., and Choi, M.R., 2018, Applicability and limitations of groundwater yield estimation equations for radial collector wells, J. Eng. Geol., 28(3), 443-453.

Kim, G.B., Lee, J.Y., and Lee, K.K., 2004, Application of repre-sentative elementary area (REA) to lineament density analysis for groundwater implications, Geo. Sci. J., 8(1), 27-42.

10.1007/BF02910276

K-water, 2002, Report on the development of riverside filtration and its amount, 56p.

Oh, S.H., Jeong, J.H., and Park, S.G., 2012, Evaluation of pump-ing capacity of radial collector wells using Milojevic’s equation in the National River Watershed, Korea, J. Soil Groundw. Envi-ron., 17(3), 10-20.

10.7857/JSGE.2012.17.3.010

Slichter C.S., 1898, Theoretical investigations of the motions of groundwater, USGS, 295-384.

Taeyoung Construction, 2015, Geotechnical survey report on the riverside filtration facility construction in the Nakdong River (Section 1), 148p.

Information

Publisher :The Korean Society of Soil and Groundwater Environment
Publisher(Ko) :한국지하수토양환경학회
Journal Title :Journal of Soil and Groundwater Environment
Journal Title(Ko) :지하수토양환경
Volume : 25
No :2
Pages :1-8
Received Date : 2020-03-23
Revised Date : 2020-05-12
Accepted Date : 2020-06-05
DOI :https://doi.org/10.7857/JSGE.2020.25.2.001

Journal of Soil and Groundwater Environment ISSN:1598-6438(Print) 2287-8831(Online) 지하수토양환경

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