When a radial collector well is installed and operated for agricultural purposes, negative impacts may be observed over time due to the clogging of horizontal arms, such as reduced groundwater discharge and water quality deterioration. When radial collector well No. 2 was rehabilitated using the high-pressure impulse generation technique, the specific capacity and transmissivity were increased by 43.1 and 100.6%, respectively. In contrast, according to air surging, the specific capacity and transmissivity increased by 33.8 and 85.8%, respectively, compared to the initial rate before rehabilitation. During the operation of radial collector wells since construction, the time of well rehabilitation can be effectively determined by continuously monitoring the groundwater level and pumping rate of the radial collector wells, thereby preventing a decrease in productivity.

Abstract
Introduction
Study Area
    Geological and geographical setting
    Configuration of the radial collector wells
Results
    Procedure of high-pressure impulse technique
    Hydraulic property of the radial collector well
    Assessment of well productivity by rehabilitation
Discussion and Conclusions
References

• Jeon Hang-Tak(Department of Geological Sciences, Busan National University)
• Se-Yeong Hamm(Department of Geological Sciences, Busan National University) Corresponding author
• Soun-Ouk Hong(Jeongbuk Regional Headquarter, Korea Rural Community Corporation)
• Sang Yong Lee(Impulse Tech Co., Ltd.)
• Hyoung-Soo Kim(Department of Renewable Energy, Jungwon University)