市中心城区暴雨强度公式(修订)
1.总则
1.1 编制的必要性和目的
城市暴雨强度公式编制是城市室外排水工程规划设计的重要基础性工作。我国已经进入高速城市化时期,特大城市和城市群的出现,城市“热岛效应”凸现。城市降雨特征会发生局地性变化。已有数据表明,部分城市每隔10年左右出现超过历史记录的特大暴雨,近年来突发性、短时特大暴雨频发。依据水文气象频率分析的理论,基于已有的降雨记录数据,采用数理统计的方法得到的城市暴雨量、暴雨强度、降雨历时、时间空间的分布等,是科学表达城市降雨规律的一种方法,同时要认识到这种方法的科学性和局限性,以指导具体工作。
城市财富的聚集和市民生活水平的提高、城市地下空间的开发利用等因素使得城市对灾害的承受能力趋弱,降雨特征的趋势性变化对城市的防灾减灾提出挑战。新建、扩建城市室外排水设施的规划建设以及已建城市排水设施历史欠账问题的解决,都需要对城市降雨规律进行科学表达和定量分析。因此,开展城市暴雨强度公式的编制及修编是非常必要的。
为了适用国家需求和城市发展需求,指导城市暴雨强度公式的编制及修编,特编制本编制本地暴雨强度公式。
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1.2条款涉及的国家颁布的有关标准如下(但不限于) (1)《室外排水设计规》(GB50014-2006,2013年版) (2)《地面气象观测规》(QX/T 52-2007)
(3)《地面气候资料30 年整编常规项目及其统计方法》(QX/T 22-2004)
(4)《地面气象观测资料质量控制》(QX/T 118-2010) (5)《数值修约规则与极限数值的表示和判定》(GB/T 8170-2008)
(6)《水利水电工程设计洪水计算规》(SL44-93) (7)《城市排水工程规划规》(GB 50318-2000) (8)《建筑给水排水设计规》(GB 50015-2003) (9)《公路排水设计规》(JTJ 018-97) 2.资料及方法
降雨资料是暴雨强度公式推算的基础,暴雨强度公式及查算图表编制应以国家气象站自记降雨资料为依据,资料使用市红塔区国家基本气象站1981年1月至2014年12月逐分钟降水自记资料。降雨资料完整、合理,所用资料真实可靠。
暴雨强度公式及计算图表的编制国家相关规推荐的方法基础上进行推算,推算方法及过程科学合理,采用滑动统计降雨历时的年度最大值雨量,滑动步长为1min,降雨频率分布曲线拟合中经用皮尔逊Ⅲ型、指数型、耿贝尔型函数的
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最小二乘法和高斯牛顿法运算比较。三种函数曲线的最小二乘法均能通过对均方差计算。均能通过平均绝对均方差不宜大于0.05mm/min;在较大降雨强度的地方,平均相对均方差不宜大于5%规定的检验,皮尔逊Ⅲ型、指数型、耿贝尔型函数平均绝对均方差分别为0.032mm/min、0.026mm/min、0.029mm/min。根据技术《导则城市暴雨强度公式编制和设计暴雨雨型确定技术导则》,最终采用皮尔逊Ⅲ型分布曲线拟合,确定市暴雨强度公式,计算结果的精度能达到国家标准《室外排水设计规》(GB50014-2006,2013版)规定的要求。
3.暴雨强度公式和图表 3.1暴雨强度公式
q2870.528(10.633lgP)(t14.742)0.818
暴雨强度算得的平均绝对均方差、平均相对均方差:平均绝对标准差:0.032mm/min平均相对标准差:3.83 %。
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3.2市暴雨强度历时重现期关系曲线图
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3.3不同历时强度频率曲线图
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3.4暴雨强度查算表
市中心城区暴雨强度查算表
P=2年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 358.486 37 129.627 73 84.099 109 63.633 2 339.221 38 127.595 74 83.327 110 63.22 3 322.144 39 125.633 75 82.571 111 62.813 4 306. 40 123.738 76 81.83 112 62.412 5 293.174 41 121.906 77 81.104 113 62.017 6 280.766 42 120.134 78 80.393 114 61.627 7 269.483 43 118.419 79 79.695 115 61.243 8 259.173 44 116.758 80 79.011 116 60.8 9 249.711 45 115.149 81 78.34 117 60.49 10 240.995 46 113.5 82 77.681 118 60.122 11 232.935 47 112.076 83 77.035 119 59.758 12 225.459 48 110.608 84 76.401 120 59.4 13 218.503 49 109.182 85 75.779 121 59.046 14 212.013 50 107.797 86 75.168 122 58.697 15 205.942 51 106.451 87 74.568 123 58.353 16 200.249 52 105.143 88 73.978 124 58.013 17 194.9 53 103.87 73.399 125 57.677 18 1.861 102.631 90 72.83 126 57.346 19 185.108 55 101.425 91 72.271 127 57.019 20 180.614 56 100.251 92 71.722 128 56.697 21 176.359 57 99.107 93 71.182 129 56.378 22 172.324 58 97.992 94 70.651 130 56.063 23 168.491 59 96.904 95 70.129 131 55.753 24 1.845 60 95.844 96 69.615 132 55.446 25 161.373 61 94.809 97 69.11 133 55.143 26 158.061 62 93.8 98 68.613 134 .844 27 1.8 63 92.814 99 68.124 135 .8 28 151.875 91.851 100 67.3 136 .256 29 148.981 65 90.911 101 67.169 137 53.967 30 146.209 66 .991 102 66.703 138 53.682 31 143.551 67 .093 103 66.244 139 53.4 32 140.999 68 88.215 104 65.792 140 53.122 33 138.7 69 87.355 105 65.347 141 52.847 34 136.1 70 86.515 106 .909 142 52.575 35 133.92 71 85.692 107 .477 143 52.306 36 131.734 72 84.887 108 .052 144 52.04 t q 145 51.777 146 51.517 147 51.26 148 51.006 149 50.755 150 50.507 151 50.261 152 50.018 153 49.778 1 49. 155 49.305 156 49.072 157 48.842 158 48.614 159 48.388 160 48.165 161 47.944 162 47.726 163 47.509 1 47.295 165 47.083 166 46.873 167 46.666 168 46.46 169 46.256 170 46.055 171 45.855 172 45.657 173 45.462 174 45.268 175 45.076 176 44.885 177 44.697 178 44.51 179 44.325 180 44.142
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市中心城区暴雨强度查算表
P=3年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 402.199 37 146.949 73 95.435 109 72.222 2 380.986 38 144.653 74 94.56 110 71.7 3 362.137 39 142.437 75 93.703 111 71.292 4 345.265 40 140.296 76 92.863 112 70.837 5 330.066 41 138.226 77 92.04 113 70.388 6 316.294 42 136.223 78 91.233 114 69.946 7 303.752 43 134.285 79 90.442 115 69.51 8 292.277 44 132.408 80 .667 116 69.08 9 281.734 45 130.588 81 88.906 117 68.655 10 272.011 46 128.824 82 88.159 118 68.237 11 263.011 47 127.113 83 87.427 119 67.825 12 2.656 48 125.452 84 86.708 120 67.418 13 246.875 49 123.839 85 86.002 121 67.016 14 239.61 50 122.273 86 85.309 122 66.62 15 232.809 51 120.75 87 84.628 123 66.229 16 226.428 52 119.269 88 83.96 124 65.843 17 220.427 53 117.828 83.303 125 65.462 18 214.773 116.426 90 82.658 126 65.086 19 209.436 55 115.061 91 82.023 127 .715 20 204.388 56 113.732 92 81.4 128 .349 21 199.606 57 112.437 93 80.788 129 63.987 22 195.069 58 111.174 94 80.185 130 63.63 23 190.757 59 109.943 95 79.593 131 63.277 24 186.655 60 108.742 96 79.01 132 62.929 25 182.746 61 107.57 97 78.437 133 62.585 26 179.016 62 106.426 98 77.873 134 62.245 27 175.4 63 105.31 99 77.318 135 61.91 28 172.047 104.219 100 76.772 136 61.578 29 168.786 65 103.1 101 76.235 137 61.25 30 165.66 66 102.112 102 75.706 138 60.927 31 162.662 67 101.094 103 75.185 139 60.607 32 159.784 68 100.099 104 74.672 140 60.29 33 157.018 69 99.126 105 74.167 141 59.978 34 1.357 70 98.173 106 73.67 142 59.669 35 151.795 71 97.241 107 73.18 143 59.3 36 149.328 72 96.328 108 72.698 144 59.062 t q 145 58.763 146 58.468 147 58.177 148 57.888 149 57.603 150 57.321 151 57.042 152 56.766 153 56.493 1 56.223 155 55.956 156 55.692 157 55.43 158 55.171 159 .915 160 .662 161 .411 162 .163 163 53.917 1 53.674 165 53.433 166 53.195 167 52.959 168 52.725 169 52.494 170 52.265 171 52.038 172 51.814 173 51.591 174 51.371 175 51.153 176 50.937 177 50.723 178 50.511 179 50.301 180 50.093
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市中心城区暴雨强度查算表
t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 页脚
P=5年 t 单位:分钟; q 单位:升/秒/公顷 q t q t q t q t 450.819 37 166.633 73 108.322 109 81.975 145 427.551 38 1.04 74 107.329 110 81.443 146 406.819 39 161.536 75 106.357 111 80.919 147 388.216 40 159.117 76 105.405 112 80.402 148 371.422 41 156.777 77 104.471 113 79.2 149 356.177 42 1.513 78 103.556 114 79.39 150 342.27 43 152.321 79 102.658 115 78.4 151 329.526 44 150.198 80 101.778 116 78.406 152 317.801 45 148.141 81 100.915 117 77.924 153 306.973 46 146.145 82 100.067 118 77.449 1 296.941 47 144.209 83 99.236 119 76.98 155 287.616 48 142.33 84 98.42 120 76.518 156 278.925 49 140.505 85 97.619 121 76.062 157 270.802 50 138.731 86 96.833 122 75.612 158 263.192 51 137.007 87 96.06 123 75.168 159 256.047 52 135.331 88 95.302 124 74.73 160 249.323 53 133.7 94.556 125 74.297 161 242.983 132.112 90 93.824 126 73.87 162 236.994 55 130.566 91 93.104 127 73.448 163 231.327 56 129.06 92 92.396 128 73.032 1 225.956 57 127.593 93 91.701 129 72.621 165 220.857 58 126.163 94 91.017 130 72.216 166 216.01 59 124.768 95 90.345 131 71.815 167 211.395 60 123.407 96 .683 132 71.419 168 206.996 61 122.079 97 .032 133 71.028 169 202.797 62 120.783 98 88.392 134 70.2 170 198.786 63 119.518 99 87.762 135 70.261 171 194.948 118.282 100 87.142 136 69.884 172 191.272 65 117.074 101 86.532 137 69.512 173 187.749 66 115.3 102 85.932 138 69.144 174 184.369 67 114.739 103 85.34 139 68.78 175 181.122 68 113.611 104 84.758 140 68.421 176 178.001 69 112.507 105 84.185 141 68.066 177 174.998 70 111.427 106 83.62 142 67.715 178 172.106 71 110.37 107 83.063 143 67.368 179 169.32 72 109.335 108 82.515 144 67.025 180 q 66.686 66.351 66.019 65.692 65.367 65.047 .73 .416 .106 63.799 63.496 63.195 62.8 62.604 62.313 62.025 61.74 61.458 61.179 60.902 60.629 60.358 60.09 59.824 59.562 59.301 59.044 58.788 58.536 58.285 58.037 57.792 57.9 57.308 57.069 56.832 . .
市中心城区暴雨强度查算表
P=10年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 4.609 37 185.591 73 120.445 109 90.872 2 465.742 38 182.708 74 119.332 110 90.274 3 444.311 39 179.922 75 118.241 111 .685 4 424.951 40 177.228 76 117.173 112 .105 5 407.368 41 174.623 77 116.125 113 88.533 6 391.321 42 172.101 78 115.098 114 87.969 7 376.612 43 169.658 79 114.091 115 87.412 8 363.076 44 167.291 80 113.104 116 86.8 9 350.574 45 1.996 81 112.135 117 86.323 10 338.988 46 162.769 82 111.184 118 85.7 11 328.218 47 160.608 83 110.251 119 85.263 12 318.18 48 158.51 84 109.335 120 84.744 13 308.797 49 156.472 85 108.436 121 84.232 14 300.007 50 1.491 86 107.5 122 83.727 15 291.7 51 152.5 87 106.687 123 83.228 16 283.988 52 150.69 88 105.835 124 82.736 17 276.666 53 148.867 104.998 125 82.25 18 269.75 147.091 90 104.176 126 81.771 19 263.206 55 145.362 91 103.368 127 81.297 20 257.004 56 143.678 92 102.574 128 80.83 21 251.117 57 142.036 93 101.793 129 80.369 22 245.521 58 140.435 94 101.025 130 79.913 23 240.194 59 138.874 95 100.27 131 79.463 24 235.118 60 137.35 96 99.527 132 79.019 25 230.273 61 135.863 97 98.796 133 78.58 26 225.4 62 134.412 98 98.078 134 78.147 27 221.217 63 132.994 99 97.37 135 77.719 28 216.977 131.609 100 96.674 136 77.296 29 212.914 65 130.256 101 95.9 137 76.878 30 209.016 66 128.933 102 95.315 138 76.465 31 205.273 67 127. 103 94.651 139 76.057 32 201.675 68 126.375 104 93.997 140 75.653 33 198.214 69 125.137 105 93.353 141 75.255 34 194.883 70 123.927 106 92.719 142 74.861 35 191.673 71 122.741 107 92.094 143 74.471 36 188.577 72 121.581 108 91.478 144 74.087 页脚
t q 145 73.706 146 73.33 147 72.958 148 72.59 149 72.226 150 71.867 151 71.511 152 71.159 153 70.811 1 70.466 155 70.126 156 69.7 157 69.455 158 69.126 159 68.799 160 68.476 161 68.156 162 67.84 163 67.527 1 67.217 165 66.91 166 66.606 167 66.305 168 66.008 169 65.713 170 65.421 171 65.132 172 .846 173 .562 174 .282 175 .004 176 63.728 177 63.456 178 63.185 179 62.918 180 62.653 . .
市中心城区暴雨强度查算表
P=20年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 526.878 37 204.517 73 131.922 109 98.858 2 502.814 38 201.319 74 130.677 110 98.19 3 481.012 39 198.228 75 129.458 111 97.532 4 461.161 40 195.237 76 128.263 112 96.884 5 443.005 41 192.343 77 127.092 113 96.245 6 426.33 42 1. 78 125.944 114 95.615 7 410.959 43 186.824 79 124.818 115 94.993 8 396.741 44 184.192 80 123.713 116 94.381 9 383.9 45 181.638 81 122.63 117 93.777 10 371.271 46 179.16 82 121.567 118 93.181 11 359.816 47 176.7 83 120.523 119 92.593 12 349.1 48 174.417 84 119.499 120 92.014 13 339.052 49 172.146 85 118.494 121 91.442 14 329.612 50 169.938 86 117.507 122 90.878 15 320.723 51 167.791 87 116.537 123 90.321 16 312.338 52 165.701 88 115.585 124 .772 17 304.414 53 163.668 114.9 125 .23 18 296.914 161.687 90 113.73 126 88.694 19 2.803 55 159.758 91 112.826 127 88.166 20 283.052 56 157.878 92 111.938 128 87.5 21 276.632 57 156.045 93 111.065 129 87.13 22 270.52 58 1.258 94 110.206 130 86.622 23 2.693 59 152.515 95 109.362 131 86.12 24 259.132 60 150.814 96 108.532 132 85.624 25 253.818 61 149.153 97 107.715 133 85.135 26 248.735 62 147.532 98 106.911 134 84.651 27 243.867 63 145.948 99 106.121 135 84.174 28 239.202 144.401 100 105.343 136 83.702 29 234.726 65 142.8 101 104.577 137 83.236 30 230.427 66 141.41 102 103.823 138 82.776 31 226.296 67 139.965 103 103.081 139 82.321 32 222.321 68 138.551 104 102.35 140 81.871 33 218.496 69 137.168 105 101.63 141 81.427 34 214.81 70 135.814 106 100.922 142 80.988 35 211.256 71 134.4 107 100.223 143 80.5 36 207.827 72 133.192 108 99.536 144 80.125 页脚
t q 145 79.701 146 79.282 147 78.867 148 78.457 149 78.052 150 77.651 151 77.255 152 76.863 153 76.476 1 76.092 155 75.713 156 75.338 157 74.967 158 74.599 159 74.236 160 73.877 161 73.521 162 73.169 163 72.82 1 72.475 165 72.134 166 71.796 167 71.462 168 71.131 169 70.803 170 70.478 171 70.157 172 69.839 173 69.524 174 69.212 175 68.903 176 68.597 177 68.293 178 67.993 179 67.696 180 67.401 . .
市中心城区暴雨强度查算表
P=30年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 550.638 37 216.379 73 139.362 109 104.198 2 526.226 38 212.995 74 138.039 110 103.487 3 504.028 39 209.723 75 136.743 111 102.788 4 483.75 40 206.557 76 135.473 112 102.098 5 465.148 41 203.492 77 134.227 113 101.418 6 448.018 42 200.523 78 133.006 114 100.748 7 432.19 43 197.6 79 131.809 115 100.087 8 417.517 44 194.856 80 130.634 116 99.435 9 403.874 45 192.15 81 129.482 117 98.793 10 391.155 46 1.522 82 128.352 118 98.159 11 379.267 47 186.971 83 127.242 119 97.534 12 368.13 48 184.493 84 126.153 120 96.918 13 357.672 49 182.084 85 125.084 121 96.31 14 347.833 50 179.742 86 124.034 122 95.71 15 338.558 51 177.4 87 123.002 123 95.118 16 329.799 52 175.246 88 121.9 124 94.533 17 321.513 53 173.088 120.994 125 93.957 18 313.662 170.986 90 120.016 126 93.388 19 306.212 55 168.938 91 119.055 127 92.826 20 299.132 56 166.942 92 118.111 128 92.272 21 292.394 57 1.996 93 117.182 129 91.724 22 285.975 58 163.098 94 116.269 130 91.184 23 279.852 59 161.246 95 115.371 131 90.65 24 274.003 60 159.439 96 114.487 132 90.123 25 268.411 61 157.676 97 113.619 133 .603 26 263.059 62 155.953 98 112.7 134 .0 27 257.931 63 1.27 99 111.923 135 88.581 28 253.013 152.626 100 111.095 136 88.079 29 248.292 65 151.02 101 110.281 137 87.584 30 243.757 66 149.449 102 109.479 138 87.094 31 239.396 67 147.912 103 108.6 139 86.611 32 235.2 68 146.41 104 107.912 140 86.133 33 231.158 69 144.94 105 107.146 141 85.66 34 227.263 70 143.501 106 106.392 142 85.194 35 223.506 71 142.092 107 105.65 143 84.732 36 219.881 72 140.713 108 104.918 144 84.276 页脚
t q 145 83.825 146 83.38 147 82.939 148 82.504 149 82.073 150 81.7 151 81.226 152 80.809 153 80.397 1 79.99 155 79.587 156 79.188 157 78.794 158 78.403 159 78.017 160 77.635 161 77.257 162 76.883 163 76.513 1 76.146 165 75.784 166 75.425 167 75.069 168 74.718 169 74.369 170 74.025 171 73.683 172 73.345 173 73.01 174 72.679 175 72.351 176 72.026 177 71.704 178 71.385 179 71.069 180 70.756 . .
市中心城区暴雨强度查算表
P=50年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q t q 1 578.633 37 230.781 73 148.512 109 110.817 145 88.972 2 553.835 38 227.178 74 147.095 110 110.056 146 88.494 3 531.198 39 223.693 75 145.706 111 109.305 147 88.022 4 510.445 40 220.32 76 144.345 112 108.566 148 87.555 5 491.347 41 217.0 77 143.011 113 107.836 149 87.093 6 473.71 42 213.8 78 141.702 114 107.118 150 86.636 7 457.369 43 210.821 79 140.419 115 106.409 151 86.185 8 442.185 44 207.845 80 139.161 116 105.71 152 85.738 9 428.036 45 204.958 81 137.926 117 105.021 153 85.297 10 414.819 46 202.1 82 136.714 118 104.342 1 84.86 11 402.442 47 199.431 83 135.525 119 103.672 155 84.428 12 390.826 48 196.785 84 134.358 120 103.011 156 84.001 13 379.902 49 194.213 85 133.212 121 102.358 157 83.578 14 369.609 50 191.711 86 132.086 122 101.715 158 83.16 15 359.3 51 1.277 87 130.981 123 101.08 159 82.746 16 350.705 52 186.908 88 129.5 124 100.4 160 82.336 17 342.004 53 184.601 128.828 125 99.835 161 81.931 18 333.749 182.3 90 127.78 126 99.225 162 81.53 19 325.908 55 180.165 91 126.749 127 98.623 163 81.133 20 318.45 56 178.031 92 125.736 128 98.028 1 80.74 21 311.346 57 175.95 93 124.741 129 97.441 165 80.352 22 304.572 58 173.92 94 123.762 130 96.862 166 79.967 23 298.104 59 171.94 95 122.799 131 96.2 167 79.586 24 291.922 60 170.006 96 121.852 132 95.724 168 79.209 25 286.007 61 168.119 97 120.92 133 95.166 169 78.836 26 280.341 62 166.276 98 120.004 134 94.615 170 78.467 27 274.91 63 1.475 99 119.102 135 94.071 171 78.101 28 269.698 162.715 100 118.214 136 93.533 172 77.739 29 2.692 65 160.995 101 117.341 137 93.002 173 77.38 30 259.88 66 159.314 102 116.481 138 92.477 174 77.025 31 255.251 67 157.669 103 115.634 139 91.958 175 76.673 32 250.794 68 156.06 104 114.801 140 91.446 176 76.325 33 246.5 69 1.486 105 113.98 141 90.939 177 75.98 34 242.36 70 152.945 106 113.171 142 90.439 178 75.639 35 238.365 71 151.436 107 112.375 143 .944 179 75.3 36 234.507 72 149.959 108 111.59 144 .455 180 74.965 页脚
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市中心城区暴雨强度查算表
P=100年 t 单位:分钟; q 单位:升/秒/公顷 t q t q t q t q 1 607.834 37 246.659 73 158.5 109 118.024 2 582.805 38 242.817 74 157.041 110 117.205 3 559.855 39 239.099 75 155.8 111 116.397 4 538.73 40 235.498 76 1.085 112 115.601 5 519.219 41 232.011 77 152.651 113 114.817 6 501.14 42 228.63 78 151.245 114 114.043 7 484.34 43 225.352 79 149.866 115 113.281 8 468.684 44 222.171 80 148.512 116 112.529 9 4.059 45 219.084 81 147.185 117 111.788 10 440.363 46 216.085 82 145.882 118 111.056 11 427.511 47 213.172 83 144.603 119 110.335 12 415.425 48 210.34 84 143.348 120 109.624 13 404.037 49 207.587 85 142.116 121 108.922 14 393.2 50 204.909 86 140.905 122 108.23 15 383.126 51 202.302 87 139.716 123 107.7 16 373.501 52 199.7 88 138.8 124 106.873 17 3.372 53 197.293 137.401 125 106.207 18 355.702 194.885 90 136.273 126 105.551 19 347.455 55 192.538 91 135.165 127 104.903 20 339.601 56 190.25 92 134.075 128 104.263 21 332.113 57 188.019 93 133.004 129 103.631 22 324.9 58 185.842 94 131.951 130 103.008 23 318.133 59 183.717 95 130.915 131 102.392 24 311.597 60 181.3 96 129.7 132 101.784 25 305.338 61 179.618 97 128.4 133 101.184 26 299.338 62 177. 98 127.908 134 100.591 27 293.582 63 175.708 99 126.938 135 100.005 28 288.0 173.819 100 125.983 136 99.426 29 282.742 65 171.972 101 125.043 137 98.855 30 277.631 66 170.166 102 124.118 138 98.29 31 272.712 67 168.4 103 123.207 139 97.732 32 267.973 68 166.672 104 122.31 140 97.181 33 263.404 69 1.981 105 121.427 141 96.636 34 258.997 70 163.326 106 120.557 142 96.098 35 2.742 71 161.706 107 119.7 143 95.566 36 250.632 72 160.119 108 118.856 144 95.04 页脚
t q 145 94.52 146 94.006 147 93.498 148 92.996 149 92.499 150 92.008 151 91.522 152 91.042 153 90.567 1 90.097 155 .633 156 .173 157 88.719 158 88.269 159 87.824 160 87.383 161 86.948 162 86.517 163 86.09 1 85.668 165 85.25 166 84.836 167 84.427 168 84.021 169 83.62 170 83.223 171 82.83 172 82.441 173 82.055 174 81.673 175 81.295 176 80.921 177 80.55 178 80.183 179 79.82 180 79.459 . .
3.5暴雨强度“历时”重现期关系表
市中心城区暴雨强度“历时”重现期关系表
暴雨强度i-P-t表 重现期 1 2 3 5 10 20 50 100
降雨历时 5 6.43 9.004 9.939 11.193 12.423 13.48 14.734 15.62 10 11.026 14.468 15.9 17.988 20.076 21.971 24.214 25.839 15 14.33 18.848 20.718 23.574 26.482 29.079 32.247 34.532 20 16.744 22.353 24.674 28.22 31.83 35.0 38.987 41.823 30 20.201 27.325 30.286 24.609 38.932 42.8 47.497 50.859 45 22.747 31.578 35.13 40.217 45.305 49.816 55.095 58.935 60 24.817 34.424 38.307 43.519 48.731 53.33 58.849 62.631 90 26.845 37.116 41.247 47.163 53.08 58.327 .467 68.933 120 30.212 41.4 45.904 51.876 57.73 62.766 68.738 72.953 150 35.526 48.745 53.977 61.000 67.884 73.805 80.828 85.785 180 37.655 51.524 57.014 .382 71.606 77.818 85.186 90.387 页脚
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