Abstract ▼

Purposes and Contents
1. Objectives
∘ To Secure additional groundwater resources by scientific and systematic rehabilitation for pre-existing agricultural public wells

- Immediate irrigation of groundwater against severe drought events in accordance with climate change

- Scientif

Purposes and Contents
1. Objectives
∘ To Secure additional groundwater resources by scientific and systematic rehabilitation for pre-existing agricultural public wells

- Immediate irrigation of groundwater against severe drought events in accordance with climate change

- Scientific rehabilitation responding to the increasing demands on groundwater of horticultural facilities

- Development of standardized guidelines in order to establish optimal management for rural groundwater resources.

2. Necessities
∘ Sustainable management for agricultural public wells and maintaining their yields coping with frequently occurring severe drought events by climate change

∘ Increasing demands on groundwater as irrigation water for most horticultural facilities due to its relatively clean qualities compared with surface water such as streams and reservoirs

∘ Low-yields and deteriorating-qualities concerns for agricultural public wells by non- periodical rehabilitating actions due to the lack of local governments’ budgets to maintain them

∘ Requirements of systematic managements for low-yield agricultural public wells located in rural area from local interesting groups

3. Contents and Scopes
∘ Identifying the causes for deteriorating groundwater quality from agricultural public wells with time
∘ Establishment of a systematic diagnostic method for agricultural public wells
∘ Investigation and analysis of on-site rehabilitation techniques
∘ Establishment of the standardized diagnostic guidelines for agricultural public wells
∘ (Field tests) Evaluating the effect of rehabilitation on groundwater quality and quantity
∘ (Field tests) Quantitative evaluation for improvement effects of performance after mechanical rehabilitation treatments on agricultural public wells
∘ (Field tests) Assessment on improvement of groundwater quality after mechanical rehabilitation treatments on agricultural public wells
∘ Development of short-term and in-situ rehabilitation methods
∘ A systematic rehabilitation plan on agricultural public wells
∘ A standardized guideline for rehabilitation on agricultural public wells
∘ Future applications

Results
1. Identifying the causes for deteriorating groundwater quality from agricultural public wells with time
[Methods] Scientific identification of the causes for deteriorating groundwater quality from agricultural public wells
∘ References for research
∘ Analysis of pre-existing field data
∘ Scientific consideration of the causes for incrustation and corrosion

[Results] Identification of the causes for deterioration of groundwater within the wells
∘ Deterioration due to the inadequate management for the wells
∘ Damage by natural disaster or non-intensive accidents
∘ Malfunction of ageing parts: decreasing yield of groundwater
∘ Natural deterioration due to groundwater use with time
∘ Incrustation: Chemical/microbiological precipitation on slots, filling sediments on slots and submerging motors
∘ Corrosion: hydraulic, galvanic, chemical, and biological corrosion, oxidation

2. Investigation and analysis of on-site rehabilitation techniques
[Methods] Investigation of laws regarding rehabilitation and on-site rehabilitation techniques
∘ Investigation of on-site rehabilitation techniques
∘ Investigation of domestic patents regarding rehabilitation
∘ Preparation for a short-term and in-situ rehabilitation equipment

[Results] Investigation and analysis of on-site rehabilitation techniques
∘ Mechanical rehabilitation methods
- Air-surging, Blushing, Surge block, Emission, Blasting, and Sonic

∘ Chemical rehabilitation methods
- Disinfection, Chelate, Surfactant, and Poly-phosphate

∘ Domestic pIatents(29)
- Keywords for searching: Groundwater, Well(Borehole), Flushing, Cleaning
- Air-surging(38%), Blush(32%), Gas-injection(3%), Pulse-discharge(3%), Others(24%)

3. Establishment of systematic diagnostic methods for agricultural public wells
[Methods] Establishment of the scientific and systematic diagnostic methods for low-yielding agricultural public wells

∘ Establishment of the diagnostic framework for agricultural public wells

∘ Analysis of design for the wells in order to make detailed diagnostic methods

∘ Verifying the newly developed diagnostic method

[Results] Quantification of a diagnostic method for agricultural public wells
∘ Search for the customized rehabilitation methods in fields

∘ Analysis of design for agricultural public wells: legal papers, facility information, and others

∘ Diagnosis for groundwater quantity and quality
- Quantity: Specific yield, Critical yield, Well efficiency, and Transmissivity
- Quality: Color, Dissolved oxygen, Chloride, Iron, Manganese, and Consumption of potassium permanganate

∘ Borehole logging: geophysical logging method, submerging TV camera recording diagnosis of the wells

4. Establishment of standardized diagnostic guidelines for agricultural public wells
[Methods] Establishment of standardized diagnostic guidelines in accordance with well types
∘ Analysis of the Groundwater Act
∘ Review on register papers of agricultural public wells
∘ Standardized diagnosis guidelines including four stages
∘ Detailed implementation for each stage
∘ Establish of methods identifying improvement after rehabilitation and a year-round management guideline

[Results] Standardized diagnostic guidelines for agricultural public wells
∘ Demonstration of legal acts regarding rehabilitation methods
∘ Analysing merit/demerit of rehabilitation
∘ Standardized diagnostic guidelines consisting of four stages: basic inspection, specific inspection, rehabilitation, and management

∘ Basic inspection
- Searching references: legal papers regarding licenses and permits, references for hydrogeologic features and others
- Groundwater uses: groundwater quality, well facilities and public opinions
- Report: reporting a result of the basic inspection, demonstrating problems on groundwater and decision for conducting specific inspection

∘ Specific inspection
- Identifying problems from the report on basic inspection
- Specific inspection: scientific assessment on groundwater quality and quantity, analysis for borehole logging
- Report: reporting a result of a specific inspection, suggesting an optimal and customized rehabilitation methods

∘ Rehabilitation
- Applying the suggested rehabilitation method
- Assessment on improving groundwater quality and quantity after rehabilitation

∘ Management
- Applying short-term and in-situ rehabilitation methods

5. (Field tests) Evaluating the effect of rehabilitation on groundwater quality and quantity
[Methods] Identification of the causes of deterioration for agricultural public wells
∘ Consideration on optimal analysis for results from step-drawdown pumping tests
∘ Field tests for four agricultural public wells using the customized air-surging rehabilitation method
∘ Evaluation of groundwater quality after applying rehabilitation processes
∘ Evaluation on a relationship between incrustation and corrosion by analysing both of groundwater quality and quantity
∘ Identification of the causes of deterioration of agricultural public wells and suggesting future plans

[Results] Field tests in order to identify the improvement after rehabilitation
∘ Field tests for four agricultural public wells
- Consideration on optimal analysis for results from step-drawdown pumping tests
- Field tests for four agricultural public wells using step-drawdown pumping tests
- Evaluation of groundwater quality after rehabilitation
- Evaluation on a relationship between incrustation and corrosion

∘ Methods for field tests
- Step-drawdown pumping tests before and after rehabilitation
- Evaluation of groundwater quality before and after rehabilitation

∘ Results of the field tests for four agricultural public wells
- The older groundwater well, the more increase of well efficiencies
: (3~5 years wells) SH well: decrease of well efficiencies ranging of 6~7%, YP well: increase of well efficiencies ranging of 1~3%
: (9~10 years wells) SS well: increase of well efficiencies ranging of 22~32%, HW well: increase of well efficiencies ranging of 26~43%

- Floating materials in borehole and organic matters affecting the well efficiencies
: Both of incrustation and corrosion directly affecting decreasing yield and deteriorating quality
: Analyzing reports on groundwater quality being able to identify the incrustation

- Suggesting the order of priority for the wells to be treated by rehabilitation
: Analyzing report on groundwater quality possibly suggesting the order
: A checklist to groundwater wells possibly demonstrating the order
: Identification of the causes of deterioration for each well and suggesting future plans

6. (Field tests) Quantitative evaluation for improvement effects of performance after mechanical rehabilitation treatments on agricultural public wells
[Methods] Identification of the causes of deterioration by applying various customized rehabilitation techniques
∘ Field tests for 12 agricultural public wells using the customized five rehabilitation methods(air-surging, high-voltage pulse discharge, power bubble, blushing, and water jetting)

∘ Quantitative evaluation on securing additional groundwater quantity after each rehabilitation method

∘ Identification for disappearance of clogging materials using a submerging TV camera

∘ Assessment and comparison on well efficiencies for five rehabilitation methods

[Results] Field tests in order to identify the improvement by applying various customized rehabilitation techniques
∘ Field tests for 12 agricultural public wells using the customized five rehabilitation methods
- Ruling and measuring each part of the testing well: determining pulse intervals and numbers
- Demonstrating experimental conditions
- Analysing merit/demerit of each rehabilitation methods
- Increase of well efficiencies ranging of 2~11%
- Similar in aquifer loss coefficient before and after rehabilitation tests, Decrease of well loss coefficient
- Increase of specific drawdown in high pumping stages
- Specific drawdown in the last stage being recorded to be 0.0027~0.0029day/㎡, showing larger than it of the initial stage
- Securing amounts of groundwater being 8~16% more than before rehabilitation
- Similar in transmissivity before and after rehabilitation tests, decrease of drawdowns
- Identification for removal of clogging materials using a submerging TV camera
: required more systematic diagnosis methods using bubble and pulse

7. (Field tests) Assessment on improvement of groundwater quality after mechanical rehabilitation treatments on agricultural groundwater wells
[Methods] Assessment on improvement of groundwater quality after mechanical rehabilitation treatments
∘ Field tests for 12 agricultural public wells using the customized five rehabilitation methods(air-surging, high-voltage pulse discharge, power bubble, blushing, and water jetting)
∘ Quantitative evaluation on the improvement of groundwater quality after each rehabilitation method
∘ Evaluating groundwater color and turbidity after rehabilitation using a submerging TV camera

[Results] Field tests in order to identify the improvement of groundwater quality
∘ Quantitative evaluation on the improvement of groundwater quality for 12 wells after each rehabilitation method
- Analysis for a total of 23 chemical/microbiological items
- Decrease of floating materials and turbidity after rehabilitation by well logging using submerging TV camera
- Results for groundwater quality demonstrating decrease of turbidity but similar in ion contents and metals
- Required an advanced technique to control and improve both of groundwater quantity and quality

8. Development of short-term and in-situ rehabilitation methods
∘ Objectives
- A short-term and periodic flushing method using pressed airs can attain in-situ management of groundwater wells, increasing the longevity of the wells using only small amount fund without lift up the groundwater facilities.
- Modification of measurement tube for identifying a groundwater level

∘ Application of two domestic patents on in-situ rehabilitation method using measurement tube for identifying a groundwater level
- In-situ rehabilitation method for groundwater wells considering the effect of well efficiencies
: Application no.: 10-2016-0064804(2016.05.26.)
: Developers: Sung-Ho Song, Byung Sun Lee, and Chung Woon An

- In-situ, interlocking rehabilitation equipment between groundwater level and a borehole and its method
: Application no.: 10-2016-0064806(2016.05.26.)
: Developers: Sung-Ho Song and Chung Woon An

9. A systematic rehabilitation plan on agricultural public wells
[Methods] Consideration for a systematic rehabilitation plan on agricultural public wells
∘ Entrusting management of agricultural public wells by professionally designated surveying institutes for groundwater in Groundwater Act
∘ Enrolling agricultural public wells of local governments to professionally designated surveying institutes for groundwater in Groundwater Act

[Results] A systematic rehabilitation plan on agricultural public wells
∘ A systematic management by professionally designated surveying institutes for groundwater in Groundwater Act
- Sharing groundwater well informations between the designated institute and local governments via the internet website(e.g., Rural Groundwater Net)
- Local government officer entering data of local agricultural public wells into the website and the designated institute substitutionally managing the wells based on the information
- Identifying the well information by administering QR code to each well

∘ Enrolling agricultural public wells of local governments to professionally designated surveying institutes for groundwater in Groundwater Act
- Right for the wells transferring from local government officer to the designated institute
- Gradual transferring the rights to the designated institute
: Priory rehabilitation for the deteriorated and low-yield wells being transferred from the local government
: Development of substitutional wells instead of fully deteriorated wells being transferred from the local government

∘ Systematic rehabilitation plans
- Agricultural public wells against the drought events
: Preemptively groundwater well management and improvement coping with the drought events
: Development of new agricultural public wells on the repeated drought occurring area
: Achievement of integrated agricultural groundwater management using the website

- Agricultural public wells on uplands
: Survey for actual groundwater irrigation and uses using public wells in uplands
: Collecting informations of each agricultural public well facility
: Periodical rehabilitation on agricultural public wells on uplands and development of integrated management system

- Agricultural public wells on mountain area
: Contribution of the price stabilization of agricultural products by a systematic management of the wells
: Providing high-quality groundwater to the farmers lived in the mountain area

10. Standardized guidelines for rehabilitation on agricultural public wells
[Methods] Development of standardized guidelines for rehabilitation on agricultural public wells
∘ Standardized guidelines for rehabilitation including three stages
∘ Conducting legal matters: surrendering legal reports regarding rehabilitation to the local government

[Results] Standardized guidelines for rehabilitation on agricultural public wells
∘ Standardized guidelines
- Rehabilitation methods for the deteriorated wells
- Approaching strategies

∘ 1st stage: Evaluation of the well before applying rehabilitation methods
- Pumping test before lifting submerging pump(evaluation of groundwater quantity)
- Analysis of groundwater quality before lifting submerging pump(evaluation of groundwater quality)
- Lifting submerging pump
- Borehole inspection using submerging TV camera before applying rehabilitation methods
- Injecting a disinfectant into the well

∘ 2nd stage: Rehabilitation
- Applying rehabilitation methods to the wells
- Cleaning, diagnosis and flushing pumping facilities
- Ruling, measuring, and changing deteriorated parts

∘ 3rd stage: Evaluation of the well after applying rehabilitation methods
- Borehole inspection using submerging TV camera after applying rehabilitation methods
- Placing submerging pumping facilities
-Pumping test after placing submerging pump(evaluation for improvement of groundwater quantity)
- Analysis of groundwater quality after placing submerging pump(evaluation for improvement of groundwater quality)
- Identification of improvement on well efficiencies and disappearance of floating materials

∘ Conducting legal matters for the well with pumping rate more than 150㎥/day
- Surrendering ‘rehabilitation implementation plan’ to the local government before applying rehabilitation
- Receiving ‘rehabilitation implementation certificate’ from the local government
- Surrendering ‘rehabilitation completion report’ to the local government after applying rehabilitation
- Receiving ‘rehabilitation completion certificate’ from the local government

Expected Contribution
1. Business plans
∘ Application the developed methods to a total of 27,926 domestic agricultural public wells
- Public enterprise using funds from Ministry of Agriculture, Food and Rural Affairs
(MAFRA) and Korea Rural Community Corporation(KRC)

∘ Overseas enterprise
- Exporting the developed methods to the low-economic and developing countries in water crises
- Protecting own rehabilitation techniques against imported ones from overseas

2. Distribution of standardized guidelines for rehabilitation
∘ Distribution of newly developed and standardized guidelines for rehabilitation on agricultural public wells

∘ Development of integrated management system on agricultural public wells

∘ A systematic management and rehabilitation on agricultural public wells by professionally designated surveying institutes for groundwater in Groundwater Act

3. Improvement of groundwater irriagtion service to the farmers
∘ Irrigating more plentiful amounts of groundwater to the farmlands by systematic rehabilitation processes

∘ Saving the budget to develop new wells due to securing additional groundwater by applying rehabilitation processes

∘ Securing high-quality, additional groundwater by applying the developed methods to a total of 27,926 domestic agricultural public wells

∘ Providing integrated and customized service for managing rural groundwater well

(출처 : SUMMARY 19p)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 3
• 보고서 요약서 ... 5
• 요약문 ... 9
• SUMMARY ... 19
• CONTENTS ... 31
• 목차 ... 37
• 표목차 ... 43
• 그림목차 ... 47
• 제1장 연구개발과제의 개요 ... 53
• 제1절 농어촌지하수 개요 ... 53
• 1. 농어촌지하수 중요성 ... 53
• 2. 농어촌지하수 이용량 증가 추세 ... 53
• 3. 가뭄 등 기후변화에 따른 수자원 문제 ... 55
• 제2절 농어촌지하수 패러다임의 변화 ... 57
• 제3절 농어업용 공공관정 ... 59
• 1. 농어업용 공공관정 현황 ... 59
• 2. 농어업용 공공관정 기초 통계 ... 60
• 제4절 연구목적 및 범위 ... 66
• 1. 연구목적 ... 66
• 2. 연구범위 ... 66
• 3. 연구 추진체계 ... 66
• 제2장 국내외 기술개발 현황 ... 69
• 제1절 공공관정 사후관리 방법 ... 69
• 1. 기계적인 처리방법 ... 69
• 2. 화학적인 처리방법 ... 72
• 3. 국내 특허기술 현황 ... 73
• 제2절 공공관정 상시 유지관리 방법 ... 76
• 제3장 공공관정 기능저하 원인 ... 77
• 제1절 공공관정 노후화 원인 ... 77
• 제2절 공공관정 기능저하 원인 ... 79
• 1. 충전 ... 80
• 2. 부식 ... 82
• 제3절 공공관정 기능저하 현황 ... 86
• 제4장 공공관정 기능진단 방법 ... 87
• 제1절 공공관정 설계내역 조사 ... 87
• 1. 이력 정보 ... 87
• 2. 대수층 정보 ... 88
• 3. 우물자재 정보 ... 88
• 4. 수중모터펌프 및 전기시설 정보 ... 89
• 5. 개보수 정보 ... 90
• 제2절 공공관정 기능진단 ... 91
• 1. 수량 진단 방법 ... 91
• 2. 수질 진단 방법 ... 96
• 제3절 공공관정 공내검층 진단 ... 99
• 1. 물리검층 ... 99
• 2. 수중TV 검층 ... 102
• 제5장 공공관정 기능진단 표준화(안) ... 103
• 제1절 농어업용 공공관정 사후관리(재생이용) 필요성 ... 104
• 1. 법적 시행근거 ... 104
• 2. 사후관리 문제점 ... 105
• 3. 사후관리 장점 ... 107
• 제2절 기능진단 필요성 ... 109
• 제3절 기능진단 표준화(안) ... 110
• 1. 기본진단 ... 110
• 2. 세부진단 ... 114
• 3. 점검정비(사후관리) 시행 ... 118
• 4. 유지관리 진단 ... 118
• 제4절 결론 ... 119
• 제6장 관정정비 효과의 정량적 평가 기술 ... 121
• 제1절 단계양수시험 자료의 해석 기술 ... 121
• 제2절 단계양수시험 현장자료 해석 ... 124
• 1. SH 관정 ... 124
• 2. HW 관정 ... 128
• 3. YP 관정 ... 132
• 4. SS 관정 ... 136
• 제3절 지하수 수질분석 결과 ... 140
• 1. 관정별 수질분석 결과 ... 140
• 2. 수질 및 수량 상관관계 분석 ... 142
• 제4절 토의 및 결론 ... 143
• 제7장 정비공법별 지하수 추가 확보량의 정량적 평가 ... 145
• 제1절 연구방법 ... 147
• 1. 양수시설 인양 및 관정제원 확인 ... 147
• 2. 관정정비 방법 ... 147
• 3. 대수성시험 ... 152
• 4. 수중TV 검층 ... 157
• 제2절 연구결과 ... 158
• 1. 관정시설 제원측정 결과 ... 158
• 2. 대수성시험 결과 ... 159
• 3. 지하수 추가 확보량 평가 결과 ... 204
• 4. 수중TV 검층 결과 ... 210
• 제3절 토의 및 결론 ... 225
• 제8장 정비공법별 지하수 수질 개선의 정량적 평가 ... 227
• 제1절 연구방법 ... 227
• 1. 지하수 수질분석 ... 227
• 2. 소독제 투입 ... 228
• 제2절 연구결과 ... 229
• 1. 지하수 수질 분석 결과 ... 229
• 제3절 토의 및 결론 ... 238
• 제9장 상시 관정정비 기술 개발 ... 239
• 제1절 원위치 지하수 관정 세척 시스템 ... 240
• 1. 개요 ... 240
• 2. 구성요소 ... 240
• 3. 기대효과 ... 242
• 제2절 원위치 수두 연동형 관정 세척 장치 ... 242
• 1. 개요 ... 242
• 2. 구성요소 ... 243
• 3. 기대효과 ... 244
• 제10장 공공관정 정비사업 체계화 방안 ... 245
• 제1절 필요성 ... 245
• 제2절 정비사업 체계화 방안 ... 246
• 1. 지하수조사전문기관 위탁관리 ... 246
• 2. 시·군 지자체 공공관정 편입 ... 247
• 제3절 업무 내역 ... 249
• 제4절 이용목적별 체계화 ... 250
• 1. 한발대비 공공관정 ... 250
• 2. 밭기반 공공관정 ... 251
• 3. 산간·오지 공공관정 ... 251
• 제11장 공공관정 정비 표준지침서 ... 253
• 제1절 개요 ... 253
• 1. 목적 ... 253
• 2. 적용 범위 ... 254
• 제2절 정비 및 평가 방법 ... 255
• 1. 점검정비 이전 평가 방법 ... 256
• 2. 점검정비(사후관리) ... 260
• 3. 점검정비 이후 평가 방법 ... 263
• 제3절 사후관리 이행 및 종료신고 ... 265
• 제12장 연구개발 성과 ... 267
• 제1절 연구개발 성과 ... 267
• 1. 논문게재: 4건 ... 267
• 2. 특허출원: 2건 ... 267
• 3. 학술발표: 12건(해외 4건, 국내 8건) ... 267
• 4. 언론홍보: 7건 ... 268
• 5. 학술대회 특별세션: 1건 ... 269
• 6. 기술전시: 1건 ... 269
• 제2절 연구목표 대비 성과 ... 269
• 제13장 목표달성도 및 관련분야에의 기여도 ... 271
• 제1절 연구개발 목표달성도 ... 271
• 제2절 대외기여도 ... 273
• 제14장 연구개발결과의 활용계획 ... 275
• 제1절 실용화 계획 ... 275
• 제2절 향후 연구를 위한 제언 ... 276
• 제15장 연구개발과정에서 수집한 해외과학기술정보 ... 277
• 1. 관정 정보 수집 ... 277
• 2. 우물재생 장비 점검 ... 277
• 3. 기타 장비 점검 ... 277
• 4. 기계적 세척 ... 278
• 5. 수리적-기계적-화학적 세척 ... 278
• 6. 우물의 최종세정 ... 279
• 7. 사후 조사 ... 280
• 제16장 연구시설-장비 현황 ... 281
• 제17장 연구실 안전관리 이행실적 ... 283
• 제18장 연구개발결과의 대표적 연구실적 ... 285
• 제19장 종합결론 ... 287
• 참고문헌 ... 291
• 끝페이지 ... 295