표제지
목차
ABSTRACT 14
제1장 서론 17
1.1. 연구 배경 17
1.2. 연구 목적 18
제2장 연구 방법 19
2.1. 연구 지역 19
2.2. 현장 조사 20
2.2.1. 수질인자 21
2.2.2. 퇴적물 오염도 및 분포 22
2.2.3. 퇴적물 용출실험 시료채취 22
2.3. 실험실 분석 23
2.3.1. 수질인자 및 조류군집 23
2.3.2. 퇴적물 오염도 23
2.3.3. 퇴적물 용출 24
제3장 연구 결과 26
3.1. 기상 및 수체의 물리적 조건 26
3.1.1. 기상 현황 26
3.1.2. 호수 수심 29
3.2. 수질 인자 30
3.2.1. 수온 30
3.2.2. pH 32
3.2.3. 용존산소 (DO) 34
3.2.4. 전기전도도 (EC) 36
3.2.5. 산화환원전위(ORP) 38
3.2.6. 투명도(Secchi depth) 39
3.2.7. 엽록소-a (Chl-a) 40
3.2.8. 총인 (T-P) 42
3.2.9. 총질소(T-N) 44
3.2.10. 질산성질소(NO₃-N) 46
3.2.11. 염소이온 (Cl-)[이미지참조] 48
3.2.12. 황산염 이온(SO₄²-)[이미지참조] 50
3.2.13. COD 52
3.2.14. 불소 이온(F-) 및 알칼리도[이미지참조] 54
3.3. 식물성 플랑크톤 분포 57
3.3.1. 시공간적 분포 57
3.3.2. 군집별 분포 60
3.3.3. 시간적 분포 63
3.3.4. 공간적 분포 64
3.4. 퇴적물 오염도 68
3.4.1. 퇴적물의 공간적 분포 68
3.4.2. 퇴적물의 물리적 특성 69
3.4.3. 강열감량 73
3.4.4. 총질소(T-N) 78
3.4.5. 암모니아성질소 (NH₃-N) 82
3.4.6. 인 화합물 86
3.5. 퇴적물 분포 조사 104
3.5.1. 현장조사 개요 104
3.5.2. 조사 결과 106
3.6. 퇴적물 용출 기여도 조사 110
3.6.1. 퇴적물 용출실험 개요 110
3.6.2. 용출 반응조 내 수체 농도변화 113
3.6.3. 용출실험 전후 퇴적물 내부 인 농도변화 131
3.6.4. 용출량 산정 140
제4장 결론 156
참고문헌 165
Table. 1. Coordinates of sampling sites. 21
Table. 2. Water depth of lake sediments pollution research point. 29
Table. 3. Sediment thickness of sediments pollution research sites. 68
Table. 4. Thickness of lake sediments. 108
Table. 5. Release flux of total phosphorus(T-P). 142
Table. 6. Release flux of total nitrogen(T-N). 145
Table. 7. Release flux of ammonia-N(NH₃- N). 148
Table. 8. Release flux of nitrate-N(NO₃-N). 151
Fig. 1. Areal map of Yongdam reservoir and locations of sampling site. 20
Fig. 2. Gravity core sampler for sediment core sample. 22
Fig. 3. Conceptual diagram of release tank for sediment release rate... 24
Fig. 4. Temporal variations of temperature and irradiation hours. 27
Fig. 5. Temporal variation of precipitation and water level. 28
Fig. 6. Temporal variation of water temperature.... 31
Fig. 7. Temporal variation of hydrogen ion concentration.... 33
Fig. 8. Temporal variation of dissolved oxygen(DO) concentration.... 35
Fig. 9. Temporal variation of electric conductivity (EC).... 37
Fig. 10. Temporal variation of oxidation-reduction potential (ORP).... 38
Fig. 11. Temporal variation of secchi depth (SD). 40
Fig. 12. Temporal distribution of chlorophyll-a (ChI-a).... 41
Fig. 13. Temporal distribution of total phosphorus (T-P).... 43
Fig. 14. Temporal distribution of total nitrogen (T-N).... 45
Fig. 15. Temporal distribution of nitrate-N (NO₃-N).... 47
Fig. 16. Temporal distribution of chloride ion (Cl-)....[이미지참조] 49
Fig. 17. Temporal distribution of sulfate ion (SO₄²-)....[이미지참조] 51
Fig. 18. Temporal distribution of chemical oxygen demand (COD).... 53
Fig. 19. Temporal distribution of fluoride ion (F-)....[이미지참조] 55
Fig. 20. Temporal distribution of alkalinity.... 56
Fig. 21. Temporal distribution of algal taxonomic groups in Yongdam reservoir. 57
Fig. 22. Species composition of algal taxonomic groups. 58
Fig. 23. Changes in phytoplankton biomass at sampling site 60
Fig. 24. Dominant species of the Yongdam reservoir in Diatom group.... 62
Fig. 25. Dominant species of the Yongdam reservoir in Cyanobacteria... 62
Fig. 26. Dominant species of the Yongdam reservoir in Green algae... 63
Fig. 27. Comparison of previous studies changes in biomass at... 64
Fig. 28. Changes in phytoplankton biomass at sampling site. (a)May... 66
Fig. 29. Sediment particle size analysis results 71
Fig. 30. Sediment core sample. (a) site 1, (b) site 2, (c) site 3, (d)... 72
Fig. 31. Measurement results of ignition loss of lake sediment -... 75
Fig. 32. Measurement results of ignition loss of lake sediment -... 76
Fig. 33. Measurement results of ignition loss of lake sediment -... 77
Fig. 34. Concentration of total nitrogen(T-N) of lake sediment -... 79
Fig. 35. Concentration of total nitrogen(T-N) of lake sediment -... 80
Fig. 36. Concentration of total nitrogen(T-N) of lake sediment -... 81
Fig. 37. Concentration of ammonia-N(NH₃-N) of lake sediment -... 83
Fig. 38. Concentration of ammonia-N(NH₃-N) of lake sediment -... 84
Fig. 39. Concentration of ammonia-N(NH₃-N) of lake sediment -... 85
Fig. 40. Outline of fractional analysis of phosphorus present in sediments 87
Fig. 41. Concentration of phosphorus of lake sediment - September,... 89
Fig. 42. Concentration of phosphorus of lake sediment - November,... 90
Fig. 43. Concentration of phosphorus of lake sediment - March,2017.... 91
Fig. 44. Phosphorus concentration measurement result in research point at Depth - September, 2016. (a) site... 94
Fig. 45. Phosphorus concentration measurement result in Research point at Depth - November, 2016. (a) site... 98
Fig. 46. Phosphorus concentration measurement result in Research point at Depth - March, 2017. (a) site 1,... 102
Fig. 47. Conducted site of the sediment distribution survey of Lake... 105
Fig. 48. Thickness distribution of lake sediments in Yongdam reservoir. 106
Fig. 49. Release tank for sediment release rate experiment. 110
Fig. 50. Concentration change of dissolved oxygen(DO) in release... 114
Fig. 51. Concentration change of hydrogen ion(pH) in release reactor... 116
Fig. 52. Change of electric conductivity(EC) in release reactor tank.... 117
Fig. 53. Change of oxidation-reduction potential(OPR) in release... 119
Fig. 54. Concentration change of nitrate-N(NO₃-N) in release reactor... 121
Fig. 55. Concentration change of nitrite-N(NO₂-N) in release reactor... 123
Fig. 56. Concentration change of ammonia-N(NH₃-N) in release... 124
Fig. 57. Concentration change of total-N(T-N) in release reactor... 126
Fig. 58. Concentration change of total-P(T-P) in release reactor... 128
Fig. 59. Concentration change of phosphate-P(PO₄-P) in release... 130
Fig. 60. Changes in phosphorus concentration in sediment before and... 133
Fig. 61. Changes in phosphorus concentration in sediment before and... 136
Fig. 62. Changes in phosphorus concentration in sediment before and... 138
Fig. 63. Release flux of total phosphorus(T-P) by month/site.... 143
Fig. 64. Release flux of total nitrogen(T-N) by month/site.... 146
Fig. 65. Release flux of ammonia-N(NH₃-N) by month/site.... 149
Fig. 66. Release flux of nitrate-N(NO₃-N) by month/site.... 152
Fig. 67. Comparison of release flux at nitrogen series nutrients.... 154