Rainstorm intensity formula determination method based on rainstorm attenuation characteristics
A technology of rainstorm intensity and attenuation characteristics, applied in the field of rainstorm statistical analysis, can solve problems such as difficult coordination of rainstorm formula preparation methods, achieve the effects of solving the limitations of the scope of application, overcoming the inconvenience of use, and improving coordination
Active Publication Date: 2020-11-17
HOHAI UNIV
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[0004] Purpose of the invention: In view of the deficiencies in the prior art, the present invention proposes a long-duration rainstorm intensity formula determination method based on the rainstorm attenuation characteristics, which solves the technical problem that the existing municipal and water conservancy industry rainstorm formula preparation methods are difficult to coordinate, and improves the rainstorm intensity formula. Accuracy
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[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0019] Such as figure 1 As shown, a method for determining the formula of rainstorm intensity based on rainstorm attenuation characteristics includes the following steps:
[0020] Step (1), constructing a statistical sample of rainstorm data;
[0021] The annual maximum value method is preferred for the selection method of rainstorm samples. The annual maximum value method is suitable for regions with minute-by-minute self-recorded rainfall records for more than 30 years. If the statistical data is less than 30 years old, the multi-year sample method is used. In the embodiment, the measured minute-by-minute rainfall data of a weather station from 1981 to 2016 are collected, and the annual maximum value method is used to calculate 5min, 10min, 15min, 20min, 30min, 45min, 60min, 90min, 120min, 150min, 180min, 240min, 360min, 720min, 1080min, 1...
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The invention provides a rainstorm intensity formula determination method based on rainstorm attenuation characteristics. The rainstorm intensity formula determination method comprises the following steps: (1) constructing a rainstorm data statistical sample according to actually measured rainfall data; (2) selecting a distribution line type to carry out frequency analysis on the maximum rainfallin different years, and calculating theoretical design rainstorm intensities it and T of different durations t and different recurrence periods T; (3) analyzing rainstorm intensity attenuation characteristics, and calculating a comprehensive rainstorm intensity attenuation index n; (4) establishing a function relationship between the rain force ST and the recurrence period T, and solving rain force formula parameters A and B; and (5) compiling a rainstorm intensity formula. On the basis of fully considering the actual rainstorm intensity attenuation law of the region, the long-duration rainstorm intensity formula compatible with municipal drainage and water conservancy flood control requirements is established, and the parameter determination method based on the rainstorm attenuation characteristics is proposed, so that the deduced rainstorm intensity formula can better meet the actual physical law, and the method is suitable for popularization and application. The invention has the advantages of easy operation and high precision.
Description
technical field [0001] The invention relates to a rainstorm statistical analysis method, in particular to a long-duration rainstorm intensity formula determination method based on the rainstorm attenuation characteristics, which can be used for municipal and water conservancy project design. Background technique [0002] Flood control safety is an important foundation for national security and social stability, and an important bottom line constraint to ensure high-quality urban development and high-quality life. However, under the background of global climate change and high-intensity urbanization, the frequency and intensity of rainstorms in urban areas are increasing, which seriously threatens the safety of people's lives and property and the sustainable development of social economy. In order to effectively improve the ability of urban flood control and disaster reduction projects and reduce the risk of urban flood disasters, it is necessary to comprehensively consider t...
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IPC IPC(8): G06F17/11G06F17/18G06Q50/26
CPCG06F17/11G06F17/18G06Q50/26Y02A10/40
Inventor 李琼芳周正模许树洪陈启慧任黎和鹏飞杜尧韩幸烨严方家曾天山
Owner HOHAI UNIV