기흥저수지 堆積層과 境界에서의 汚染物質 特性에 관한 硏究 = (A) Study on Characteristics of Pollutants across : the Sediments-Water Interface

다국어 초록 (Multilingual Abstract)

The study was investigated the characteristics of pollutants across the sediments-water interface of GyHeng-reservoir in Yong-in city.
The study was examined the characteristics of sediments in GiHeng
-reservoir by dividing into the amount of pollutants in sediments, the release rate of pollutants forward to the waterbody, SOD(sediment oxygen demand), the type of phosphorous.
Thus, the objective of the study to estimated influence on reservoir for overloading pollutants by city construction of reservoir inflowing areas during recent a few year, by examining movement possibility to underlying water from sediments of pollutants and by accumulating input-datum for efficient waterquality management countermeasure.
Also, the study was proposed necessity for quantification of realistic pollutants loading of reservoir for agriculture in Metropolitan area.
1. The grain size classification was investigated that each sand, silt, clay occupied 36 %, 34 %, 35 % . The major grain size in upper of reservoir was sand, and in lower of reservoir was clay.
2. It was investigated that IG.(%) in sediments was average 5 %, and correlation of IG.(%) and water contents was 68 %.
Also, it was investigated that the COD concentration in pre-rainfall was 9 - 38 g/kg, and in post-rainfall was 13-33 g/kg. Average COD concentration examined with 23 g/kg. It was investigated that the T-N concentration in pre-rainfall was 1.1 g/kg, and in post-rainfall was 0.7 g/kg. Thus, The T-N concentration was decreased about 36 % by rainfall.
3. It was investigated that the sedimentation rate in pre-rainfall was 288 g/m2ㆍday, in post-rainfall was 14 g/m2ㆍday.
Thus, total sedimentation amounts during a year was about 124000 ton, and each T-N, T-P, COD sedimentation amounts during a year was about 17480 ton, 700 ton, 920 ton.
4. It was investigated that SOD value was average 4.3 g/m2ㆍday.
This value was the much higher than 1 g/m2ㆍday that the value examined in Pal-dang lake etc. in the country.
5. It was investigated that the COD release rate with pH 6,7,8 was each 0.35 %, 0.26%, 0.23 %, the T-N release rate was 2.50 %, 1.48 %, 1.52%, the T-P release rate was 0.62 %, 0.35 %, 0.18 %.
Generally, the release rate from sediments was increased with pH decrease.
6. It was investigated that the T-N, T-P release rate with DO variation in aerobic condition was each 1.0 g/m2ㆍday, 20.1 g/m2ㆍday, in anaerobic condition was each 1.2 g/m2ㆍday, 27.9 g/m2ㆍday.
Thus, the ralease rate in Giheng-reservoir has the higher influence on DO variation than pH variation.
7. It was investigated that the type of phosphorous was much various. The adsorbed-P, NAI-P, apatite-P ratio of total phosphorous was each 18 %, 29 %, 15 %. Thus, it was estimated that phosphorous type in sediments was the type that easy released to water-body.

목차 (Table of Contents)

• List of Tables = iv
• List of Figures = v
• 1. 서론 = 1
• 1.1 연구배경 및 목적 = 1
• 1.2 연구방향 = 3
• 2. 이론적 고찰 = 6
• 2.1 부영양화 현상 = 6
• 2.2 퇴적물의 정의 및 특성 = 9
• 2.2.1 퇴적오염물의 개념 = 9
• 2.2.2 영양염류의 용출 = 12
• 2.2.3 인 존재형태 = 18
• 2.3 호수 퇴적물의 용출모형 = 24
• 3. 시료채취 및 분석방법 = 25
• 3.1 조사지점 = 25
• 3.1.1 조사유역개요 = 25
• 3.1.2 조사지점선정 = 27
• 3.1.3 시료채취방법 = 31
• 3.2 연구범위 및 방법 = 32
• 3.2.1 입도분포 = 32
• 3.2.2 함수율 = 35
• 3.2.3 총량농도 = 36
• 3.2.4 퇴적속도 = 40
• 3.2.5 간극수 = 41
• 3.2.6 유기물 분해속도(SOD) = 42
• 3.2.7 용출속도 = 44
• 3.2.8 인 존재형태 = 47
• 4. 결과 및 고찰 = 50
• 4.1 수문학적 특성 = 50
• 4.2 입도분포 = 55
• 4.3 함수율 = 59
• 4.4 총량농도 = 62
• 4.4.1 pH, IG(%) = 62
• 4.4.2 COD(Chemical Oxygen Demand) = 65
• 4.4.3 T-N(Total Nitrogen) = 67
• 4.4.4 T-P(Total Phosphorous) = 68
• 4.4.5 상호 연관성 = 70
• 4.5 퇴적속도 = 74
• 4.5.1 퇴적량 = 75
• 4.5.2 COD 퇴적속도 = 77
• 4.5.3 T-N 퇴적속도 = 79
• 4.5.4 T-P 퇴적속도 = 82
• 4.6 간극수 = 85
• 4.7 유기물 분해속도(SOD) = 88
• 4.8 용출속도 = 90
• 4.8.1 pH 변화에 따른 용출속도 = 90
• 4.8.2 DO 변화에 따른 용출속도 = 98
• 4.9 인 존재형태 = 106
• 5. 결론 = 111
• 6. 참고문헌 = 115
• Appendix = 120