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목차
I. 팔당호·의암호 조류 조사 5
II. 팔당호·의암호 조류 현황 9
1. 2021년 조류경보제 결과 9
가. 기상변화와 수리학적 특성 9
나. 수질변화 12
다. 조류발생 현황 15
라. 계절별 기상변화와 수리학적 특성 21
마. 계절별 수질변화 22
바. 계절별 조류발생 현황 25
III. 팔당호·의암호 장기 조류 현황 28
1. 팔당호의 장기 조류경보제 결과('12~'21) 28
가. 기상변화와 수리학적 특성 28
나. 수질변화 29
다. 조류발생 현황 31
라. 계절별 조류발생 경향 36
2. 한강(이천)·의암호의 장기 조류경보제 결과('16~'21) 39
가. 기상변화와 수리학적 특성 39
나. 수질변화 41
다. 조류발생 현황 43
라. 계절별 조류발생 경향 46
3. 조류경보 발령('12~'21) 49
IV. 관찰지점 조류 현황 50
1. 2021년 관찰지점 운영결과 50
부록 54
부록 1. 팔당호 조류경보제 시행 목적 및 법적 근거 54
부록 2. 팔당호 조류경보제 추진 경위 및 체계 55
부록 3. 팔당호 조류경보제 발령 기준 및 대응 요령 57
부록 4. '21년 조류경보제 수질 및 식물플랑크톤 조사 결과 60
판권기 69
Table I-1-1. Monitoring sites of algae alert system in Lake Paldang 6
Table I-1-2. Characteristics of harmful cyanobacteria in Korea 8
Table II-1-1. Climate and hydraulic characteristics in Lake Paldang, 2021 9
Table II-1-2. Climate and hydraulic characteristics in Gangcheon Weir, 2021 10
Table II-1-3. Climate and hydraulic characteristics in Lake Uiam, 2021 11
Table II-1-4. Monthly variation of physico-chemical factors in 2021 13
Table II-1-5. Monthly variation of cell density of phytoplankton taxa in 2021 15
Table II-1-6. Monthly variation of relative abundance of phytoplankton taxa and dominant species in 2021 18
Table II-1-7. Seasonal variation of climate and hydraulic characteristics in Lake Paldang, 2021 21
Table II-1-8. Seasonal variation of physico-chemical factors in 2021 23
Table II-1-9. Seasonal variation of cell density of phytoplankton taxa in 2021 25
Table II-1-10. Seasonal variation of relative abundance of phytoplankton taxa and dominant species in 2021 26
Table III-1-1. Annual variation of climate and hydraulic characteristics in Lake Paldang 28
Table III-1-2. Annual variation of physico-chemical factors in Lake Paldang 30
Table III-1-3. Annual variation of cell density of phytoplankton taxa in Lake Paldang 32
Table III-1-4. Annual variation of relative abundance of phytoplankton taxa and dominant species in Lake Paldan 34
Table III-1-5. Seasonal variation of cell density of phytoplankton taxa in P2 36
Table III-1-6. Seasonal variation of cell density of phytoplankton taxa in P3 37
Table III-1-7. Seasonal variation of cell density of phytoplankton taxa in SB 38
Table III-2-1. Annual variation of climate and hydraulic characteristics in Gangcheon weir and Lake Uiam 39
Table III-2-2. Annual variation of physico-chemical factors in IC and SYG 42
Table III-2-3. Annual variation of cell density of phytoplankton taxa in IC and SYG 44
Table III-2-4. Annual variation of relative abundance of phytoplankton taxa and dominan species 45
Table III-2-5. Seasonal variation of cell density of phytoplankton taxa in IC 47
Table III-2-6. Seasonal variation of cell density of phytoplankton taxa in SYG 48
Table III-3-1. Algae alert issuing period between 2012 and 2021 49
Table IV-1-1. Monthly variation of cell density of phytoplankton taxa in three weirs, 2021 50
Table IV-1-2. Monthly variation of relative abundance of phytoplankton taxa and dominant species in three weirs, 2021 52
Fig. II-1-1. Variation of precipitation, water temperature and outflow in Lake Paldang, 2021 9
Fig. II-1-2. Variation of precipitation, water temperature and outflow in Gangcheon weir, 2021 10
Fig. II-1-3. Variation of precipitation, water temperature and outflow in Lake Uiam, 2021 11
Fig. II-1-4. Monthly variation of physico-chemical factors in 2021 14
Fig. II-1-5. Weekly variation of cell density of phytoplankton taxa and harmful cyanobacteria in 2021 16
Fig. II-1-6. Monthly variation of relative abundance of phytoplankton taxa in 2021 21
Fig. II-1-7. Seasonal variation of physico-chemical factors in 2021 24
Fig. II-1-8. Seasonal variation of relative abundance of phytoplankton taxa in 2021 27
Fig. III-1-1. Monthly variation of precipitation, water temperature and outflow in Lake Paldang 28
Fig. III-1-2. Annual variation of precipitation, outflow and residence time in Lake Paldang 29
Fig. III-1-3. Annual variation of physico-chemical factors in Lake Paldang 30
Fig. III-1-4. Monthly variation of cell density of phytoplankton taxa and harmful cyanobacteria in Lake Paldang 32
Fig. III-1-5. Annual variation of relative abundance of phytoplankton taxa in Lake Paldang 35
Fig. III-2-1. Monthly variation of precipitation, water temperature and outflow in Gancheon weir 40
Fig. III-2-2. Monthly variation of precipitation, water temperature and outflow in Lake Uiam 40
Fig. III-2-3. Annual variation of precipitation, outflow and residence time in Gangcheon weir 40
Fig. III-2-4. Annual variation of precipitation, outflow and residence time in Lake Uiam 41
Fig. III-2-5. Annual variation of physico-chemical factors in IC and SYG 43
Fig. III-2-6. Monthly variation of cell density of phytoplankton taxa with harmful cyanobacteria in IC and SYG 44
Fig. III-2-7. Annual variation of relative abundance of phytoplankton taxa in IC and SYG 46
Fig. IV-1-1. Weekly variation of cell density of phytoplankton taxa and harmful cyanobacteria in three weirs, 2021 51
Fig. IV-1-2. Monthly variation of relative abundance of phytoplankton taxa in three weirs, 2021 53