某站1961〜1979年各月径流量列于表 2-11-1 ,试结合表2-11-2求P=10%勺设计丰水年、P=50%的设计平水年、P=90%勺设计枯水年的设计年径流量?表2-11-1某站年、月径流量表( m3/s )月平均流量Q(m3/s)年平均流年份345678910111212量Q年(m3/s)61 〜6216.522.043.017.04.632.464.024.841.982.471.8721.611.962 〜637.258.6916.326.17.157.506.811.862.672.734.202.037.7863 〜648.2119.526.424.67.359.623.202.071.981.902.3513.210.064 〜6514.717.719.830.45.204.879.103.463.422.922.481.629.6465 〜6612.915.741.650.719.410.47.482.975.302.671.791.8014.466〜673.204.987.1516.25.552.282.131.272.181.546.453.874.7367〜689.9112.512.934.66.905.552.003.271.621.170.993.067.8768 〜693.9026.615.213.66.1213.44.2710.58.219.038.358.4810.469 〜709.5229.013.525.425.43.582.672.231.932.761.415.3010.270 〜7113.017.933.243.010.53.581.671.571.821.421.212.3610.971 〜729.4515.615.537.842.76.553.522.541.842.684.259.0012.672 〜7312.211.533.925.012.77.303.654.963.182.353.883.5710.373 〜7416.324.841.030.724.28.306.508.754.527.964.103.8015.174 〜755.086.1024.322.83.403.454.922.791.761.302.238.767.2475 〜763.2811.737.116.410.219.25.754.414.535.598.478.8911.376〜7715.438.541.657.431.75.866.564.552.591.631.765.2117.777〜783.285.4811.817.114.414.33.843.694.675.166.2611.18.4278 〜7922.437.158.023.910.612.46.268.517.307.543.125.5616.9表2-11-2 P — III型频率曲线 Kp值表⏺
某站1961〜1979年各月径流量列于表 2-11-1 ,试结合表2-11-2求P=10%勺设计丰水年、P=50%
的设计平水年、P=90%勺设计枯水年的设计年径流量?
表2-11-1某站年、月径流量表( m3/s )
月
平均流
量Q
(m3/s)
年平均流
年份
3
4
5
6
7
8
9
10
11
12
1
2
量Q年
(m3/s)
61 〜62
16.5
22.0
43.0
17.0
4.63
2.46
4.02
4.84
1.98
2.47
1.87
21.6
11.9
62 〜63
7.25
8.69
16.3
26.1
7.15
7.50
6.81
1.86
2.67
2.73
4.20
2.03
7.78
63 〜64
8.21
19.5
26.4
24.6
7.35
9.62
3.20
2.07
1.98
1.90
2.35
13.2
10.0
64 〜65
14.7
17.7
19.8
30.4
5.20
4.87
9.10
3.46
3.42
2.92
2.48
1.62
9.64
65 〜66
12.9
15.7
41.6
50.7
19.4
10.4
7.48
2.97
5.30
2.67
1.79
1.80
14.4
66〜67
3.20
4.98
7.15
16.2
5.55
2.28
2.13
1.27
2.18
1.54
6.45
3.87
4.73
67〜68
9.91
12.5
12.9
34.6
6.90
5.55
2.00
3.27
1.62
1.17
0.99
3.06
7.87
68 〜69
3.90
26.6
15.2
13.6
6.12
13.4
4.27
10.5
8.21
9.03
8.35
8.48
10.4
69 〜70
9.52
29.0
13.5
25.4
25.4
3.58
2.67
2.23
1.93
2.76
1.41
5.30
10.2
70 〜71
13.0
17.9
33.2
43.0
10.5
3.58
1.67
1.57
1.82
1.42
1.21
2.36
10.9
71 〜72
9.45
15.6
15.5
37.8
42.7
6.55
3.52
2.54
1.84
2.68
4.25
9.00
12.6
72 〜73
12.2
11.5
33.9
25.0
12.7
7.30
3.65
4.96
3.18
2.35
3.88
3.57
10.3
73 〜74
16.3
24.8
41.0
30.7
24.2
8.30
6.50
8.75
4.52
7.96
4.10
3.80
15.1
74 〜75
5.08
6.10
24.3
22.8
3.40
3.45
4.92
2.79
1.76
1.30
2.23
8.76
7.24
75 〜76
3.28
11.7
37.1
16.4
10.2
19.2
5.75
4.41
4.53
5.59
8.47
8.89
11.3
76〜77
15.4
38.5
41.6
57.4
31.7
5.86
6.56
4.55
2.59
1.63
1.76
5.21
17.7
77〜78
3.28
5.48
11.8
17.1
14.4
14.3
3.84
3.69
4.67
5.16
6.26
11.1
8.42
78 〜79
22.4
37.1
58.0
23.9
10.6
12.4
6.26
8.51
7.30
7.54
3.12
5.56
16.9
表2-11-2 P — III型频率曲线 Kp值表
⏺
题目解答
答案
(4)在图2-5-2的P— III型理论频率曲线上查出相应频率为 10%、50%、90%的设计年径流量,
或直接用表2-5-19中的Qio%、Q50%、Q90%值。