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제주도 어승생 수원지 주변 관정의 지하수위 변동 특성

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Alternative Title
Characteristics of Groundwater Level Variation in Wells around Eoseungsaeng Resrvoir, Jeju Island
Abstract
In this study, the hydraulic characteristics and groundwater variation characteristics due to precipitation and pumping for the wells (observation well (OW), pumping wells (PW1 and PW2)) located in Eoseungsaeng, Jeju Island, were investigated. The results of this study are summarized as follows: From the geologic columnar section of study wells, it was difficult to find the similarity of aquifers even though the distance among the wells was only in the range from 127.7 to 233.2 m, together with different geologic characteristics. Comparing groundwater level drawdown between single pumping (OW) and simultaneous pumping (OW, PW1, PW2), it was 2 to 19 times greater for the latter, indicating the groundwater level variation characteristics due to the pumping of groundwater, i.e., it means that the effect of the pumping in the downstream areas appears, even if individual hydraulic characteristics are shown between the wells. Cross Correlation analysis of precipitation and groundwater levels showed a low correlation of –0.4 to 0.3 m in all observation periods, with a lag time of 258 to 279 days when its correlation was the highest. In case of single groundwater pumping at OW, the groundwater level dropped by 0.0626 m/day, and in case of simultaneously pumped OW, PW1, and PW2, it dropped by 0.1303 to 1.212 m/day. According to the analysis of the correlation between the cumulated amount of pumping and the groundwater level, the transmissivity was in the range of 0.88~0.99 ㎡/day, and the effect of the ground water drawdown was significant due to the groundwater pumping. As a result of analyzing the ability to recover the ground water level in natural conditions without groundwater pumping, it increased by 0.02 to 0.03 m/day. It was analyzed that the recovery period according to the case of pumping 1 day takes 4.6 to 60.6 days. According to the results of the survey on the transmissivity of each well in the study area, OW 37.73 ㎡/day, PW1 9.33 ㎡/day and PW2 13.18 ㎡/day were analyzed, showing the individual hydraulic characteristic of each well. This corresponds to 0.7 to 7% of the value of the transmissivity(geometric mean) surveyed for ground water wells in the northern basin of Jeju Island, and the drawdown caused by the pumping was considered to be large and the recovery was slow because the aquifer was not developed. Considering the suitability of various analysis methods for calculating the of aquifer characteristics using the pumping test data, it was analyzed that the Moench method reflecting the storage well effect was the most appropriate. Through this study it is found that long-term precipitation data, pumping quantity, groundwater level data, and accurate geological properties are needed to investigate the variation characteristics of groundwater wells. If all these data are established, it is considered to be very helpful in predicting the groundwater level of the groundwater well. The results of this study can be applied to understanding the characteristics of groundwater level variation in wells around Eoseungsaeng.tion of volatile fatty acids was 44.9∼56.5% at the winch-curtain type facility.
Author(s)
김지명
Issued Date
2020
Awarded Date
2020. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/common/orgView/000000009720
Alternative Author(s)
Kim, Ji Myung
Affiliation
제주대학교 대학원
Department
대학원 환경공학과
Advisor
조은일
Table Of Contents
Summary v
I. 서론 1
II. 연구내용 및 방법 3
1. 연구지역 3
2. 연구방법 4
1) 지하수 산출특성 분석 4
2) 강수자료 분석 8
3) 지하수위 분석 8
III. 결과 및 고찰 11
1. 연구관정 수리특성 분석결과 11
1) 지질자료 분석결과 11
2) 대수층 수리특성 분석 15
2. 강수자료와 지하수위 자료 분석 23
1) 강수자료 분석을 통한 강수특성 23
2) 지하수위 관측자료 분석 25
3. 지하수위 변동특성 30
1) 강수량에 따른 지하수위 변동 30
2) 양수량에 의한 지하수위 변동 38
IV. 결론 50
참 고 문 헌 52
Degree
Master
Publisher
제주대학교 대학원
Citation
김지명. (2020). 제주도 어승생 수원지 주변 관정의 지하수위 변동 특성
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General Graduate School > Environmental Engineering
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