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ISSN : 1225-4517(Print)
ISSN : 2287-3503(Online)
Journal of Environmental Science International Vol.28 No.10 pp.887-898
DOI : https://doi.org/10.5322/JESI.2019.28.10.887

High-pressure Air Impulse Technique for Rehabilitating Well and Its Application to a Riverbank Filtration Site in Korea

Hang-Tak Jeon, Se-Yeong Hamm*, Jae-Yeol Cheong1), Suk-Jong Han2), Sul-Min Yun
Department of Geological Sciences, Pusan National University, Busan 46241, Korea
1)R&D Institute, Korea Radioactive Waste Agency, Daejeon 34129, Korea
2)Geosg, Busan 46241, Korea
E-mail: hsy@pusan.ac.kr
*Corresponding author: Se-Yeong Hamm, Department of Geological Sciences, Pusan National University, Busan 46241, Korea Phone : +82-51-510-2252

Abstract

Rehabilitation work is required to increase well productivity, which decreases with the elapsed time of pumping owing to the clogging of the water well. Clogging causes not only a reduction in the well productivity but also a deterioration of the water quality. For unclogging and rehabilitating wells, several techniques are used such as brushing, air surging, surge blocks, and gas impulse. In this study, the high-pressure air impulse technique, which effectively and economically rehabilitates wells, was applied to a riverbank filtration site in Korea for the same objective. At most of the wells, the hydraulic parameters (transmissivity, storage coefficient, and specific capacity) were increased by the application of the high-pressure air impulse technique. The well loss change values also indicate an increase in the hydraulic parameters by the air impulse implementation. Thus, the high-pressure air impulse technique can be efficiently and economically applied to water and riverbank filtration wells for rehabilitating the decreased productivity.

초록

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