2 2.1 2.1.1 2,157 km 2 35 2 260km 1 100 ( 12 ) - 2.1.1.1 1) (1) (km 2 ) 219.9 171.5km 2 9.35 6.52 36.2km 2 12.2km 2 (2) (km) 252 122km 22 20 75km 55km (3) (m) 4 2.1 1 (4) (m) 7 6.5 3 (5) T.P.(m) 0.260.46 0.0 6.0 (6) (m 3 ) 8.5 Y.P.-3m 0.2 0.065 Y.P.1.0m (7) 1,289 S12H8 - - (mm) (8) (m 3 ) 14-1.4 (9) 200 50 17 (10) (km 2 ) 2,157 430 148 (11) A B B (12) (COD)(mg/l) 7.9 8 6.6 7.8 (13) ( ) 970 H12 (14) (15) 3
4-2.1.1.1 N E W S
2.1.2 100 30 1.5 1 km 2 430 3-2.1.2.1 COD 2)3) 5
2.1.3 4 7 2550m ( 876m) 713 ( ) Y ( ) - 2.1.3.1 4) 6
2.1.4 1979 2000-2.1.4.1 14 1 4 25 1979 2000-2.1.4.2 9 160mm/ 6 12 1 40mm 1979 2003-2.1.4.3 800mm 1,600mm 1,800mm 1,200mm 35 30 25 20 15 10 19792000 5 0-5 1 2 3 4 5 6 7 8 9101112-2.1.4.1 ( ) 5) 7
mm 180 160 140 120 100 80 60 40 20 0 19792000 123456789101112-2.1.4.2 ( ) 5) mm 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 79 81 83 85 87 89 91 93 95 97 99 01 03-2.1.4.3 5) 1,154mm 8
2.1.5 (1) 56 1 24 4050 100 W N S E - 2.1.5.1 9
- 2.1.5.1 1 1 33.02 184.0 2 1 36.45 175.7 3-15.8 4-9.7 5 6-7 1 10.10 25.5 8 1 10.60 38.8 9 1 3.8 4.1 10 1 63.41 350.3 11 1 2.40 15.6 12 1 1.52 19.9 13-6.7 14-15.0 15 1 5.20 29.4 16 1 6.60 23.7 17 1 27.85 212.6 18-12.3 19-20 1 16.07 79.3 21-22 1 7.00 30.7 23-24 - 5.2 25-2.7 26-11.8 27-6.8 28 1 3.16 7.4 29-4.0 30-31 1 1.90 8.2 32 1 2.70 16.1 33-34 1 4.50 19.9 35 1 5.00 19.7 36-37 1 32.09 131.8 38 1 7.20 52.7 39-40 - 4.7 41-8.9 42-4.5 43 3.4 44-5.5 45-46 - 47-48 - 7.7 49-8.1 50-5.9 51 3.6 52-53 1 2.30 16.4 54 1 3.06 11.7 55 1 6.20 6.5 56 1 30.1 56 24 10
(2) 1) - 2.1.5.2 0.5 0.6 0.7 0.40.5-2.1.5.2 1999 1.90 0.25 3.95 2.49 0.68 1.02 1.57 2000 1.55 0.29 4.20 2.79 0.77 1.14 1.69 2001 2.06 0.27 4.38 2.78 0.80 1.08 1.81 m 3 2002 1.79 0.25 3.64 2.36 0.70 0.94 1.46 2003 2.37 0.31 4.43 3.07 0.89 1.14 1.79 1999 0.80 0.19 2.89 1.68 0.38 0.37 0.73 2000 0.80 0.20 2.60 1.56 0.55 0.54 0.30 2001 0.75 0.20 2.60 1.55 0.39 0.55 0.91 m 3 2002 0.70 0.15 1.96 1.49 0.27 0.40 0.81 2003 1.19 0.23 2.72 2.05 0.37 0.55 1.03 1999 0.42 0.76 0.73 0.67 0.56 0.36 0.46 2000 0.52 0.69 0.62 0.56 0.71 0.47 0.18 2001 0.36 0.74 0.59 0.56 0.49 0.51 0.50 2002 0.39 0.60 0.54 0.63 0.39 0.43 0.55 2003 0.50 0.74 0.61 0.67 0.42 0.48 0.58 GIS-DB H-Q 11
2) a) - 2.1.5.2 COD T-N T-P 7 15 12 COD COD(mg/L) 9 6 3 0 98/4/1 99/4/1 00/4/1 01/4/1 02/4/1 15 12 T-N T-N(mg/L) 9 6 3 0 98/4/1 99/4/1 00/4/1 01/4/1 02/4/1 0.8 0.6 T-P T-P(mg/L) 0.4 0.2 0 98/4/1 99/4/1 00/4/1 01/4/1 02/4/1-2.1.5.2 19982002 ( ) 12
b) - 2.1.5.3 L-Q CODT-P 1 CODT-P T-N 1 T-N 10000 COD 1000 T-N COD g/s 1000 100 10 1 y = 4.3095x 1.1807 y = 8.1717x 1.2645 y = 3.8621x 1.3253 T-N g/s 100 10 1 y = 1.4802x 1.1356 y = 2.2509x 1.1452 y = 2.4724x 1.0926 0.1 y = 5.7925x 1.4974 0.01 0.1 1 10 100 1000 m3/s 0.1 y = 4.9382x 1.0388 0.01 0.1 1 10 100 1000 m3/s 100 T-P T-P g/s 10 1 0.1 y = 0.0418x 1.4743 y = 0.1879x 1.3136 y = 0.0594x 1.4684 0.01 y = 0.1495x 1.5559 0.01 0.1 1 10 100 1000 m3/s - 2.1.5.3 L-Q ( H-Q ) 13
2.2 2.2.1 (200 ) 6) (1) 30 7) 40 50 COD 10mg/L 1974 ( 49 ) 3 8) 60 12 3 15 4 ( 1317 ) 9) 60 COD T-N T-P (- 2.2.1.1) 10) 20 COD(mg/L) 15 10 5 0 2.0 S47 S50 S53 S56 S59 S62 H2 H5 H8 H11 H14 A ( ) T-N(mg/L) 1.5 1.0 0.5 0.0 0.15 ( ) S47 S50 S53 S56 S59 S62 H2 H5 H8 H11 H14 T-P(mg/L) 0.10 0.05 0.00 ( ) S47 S50 S53 S56 S59 S62 H2 H5 H8 H11 H14-2.2.1.1 (COD(75%)T-NT-P( )) 10) 14
(2) 6) - 2.2.1.2 ( 12 ) - 2.2.1.2 6) - 2.2.1.3 CODT-N T-P - 2.2.1.3 COD ( ) ( 12 ) 6) - 2.2.1.4 COD T-P T-N - 2.2.1.4 COD ( 12 ) 6) 15
(3) - 2.2.1.1 6) - 2.2.1.1 (m 3 /s) 3.96 126.98m 3 / 106.61 3.21 12.24 0.96 126.98 ( 15331 ) 1965 1973 1,300t 1986 11) 2.2.2 200 0.3m 12) 3 5 6) 1 mm - 2.2.2.1 12) mm 10mm 12) 16
2.2.3-2.2.3.1-2.2.3.3 13) 36km 2 35 14km 2 2.6 36km 2 12.8ha(0.128km 2 ) 14) - 2.2.3.1 13) 17
- 2.2.3.2 35 13) - 2.2.3.3 13) 18
2.2.4 COD 14)15) COD 14) COD 50% COD COD 14) ( ) 14) 19
1) 1. http://www.i-step.org/kasumi/data/3/3_1.htm 2) 3) 4) 1994. 5) HP http://www.data.kishou.go.jp/etrn/index.html 6) 2003. 7) pp73-741996. 8) 2003. http://www.pref.shiga.jp/gikai/welcome/kosyoukaigi/report-pdf/jireiibaragi1.pdf 9) 4 2004. 10) HP http://www.kasumigaura.pref.ibaraki.jp/index.cfm/8,0,14,12,html 11) HP http://www.i-step.org/kasumi/data/index.htm 12) pp851382001. 13) H13 GIS 2001. 14) 2005. 15) 39 pp4662005. 20