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A Design Flood Calculation Method for Small Watershed

A technology for designing floods and small watersheds, applied in design optimization/simulation, computer-aided design, calculation, etc., can solve problems such as low accuracy and achieve high-precision results

Active Publication Date: 2021-12-07
CHINA THREE GORGES UNIV
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Problems solved by technology

[0003] However, when the comprehensive unit line method is used to calculate the design flood process, since the comprehensive unit line is not derived from the rainfall runoff process of the small watershed, the accuracy of the calculation of the small watershed design flood using this unit line is low, and the rainfall runoff of the small watershed needs to be considered process information

Method used

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  • A Design Flood Calculation Method for Small Watershed
  • A Design Flood Calculation Method for Small Watershed
  • A Design Flood Calculation Method for Small Watershed

Examples

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Embodiment 1

[0063] This example is an example in which the design flood in a small stream basin in Hubei is to express the effects achieved by the present invention.

[0064] The small watershed is located in the north of Hubei Province, the mountains, the northern part of the Hanjiang Plain, the basin is bound to 113 ° 79 ~ 113 ° 95 ', and between 31 ° 24' ~ 31 ° 45 'in the north latitude. Full length is 5.6km long, the basin area is 193km 2 The territory of the basin is low in southeast, the landform is mainly between the hilly mountain, with an altitude between 35-285 meters. There is no rainstock station and hydrological station in the basin, but there is a garden hydrological station in the downstream, the hydrological station has rainfall data, while the garden hydrological station has 7 rainsticks, A, B, C, D, E , F, g, these rainstorms have rainfall data. Examples of the largest flooding flow rate of 1969 to 1989 seven rainfall stations, the largest flood process information of the la...

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Abstract

The invention discloses a design flood calculation method for a small watershed. Determine the hydrological station downstream of the small watershed, and obtain information such as the DEM map of the watershed above the hydrological station. Load the obtained information into the GIS software, extract the drainage system of the basin, cut it, divide it into multiple natural sub-basins, assign hydrological identification numbers, add hydrological units, and generalize the basin map. Obtain the rainfall runoff process of the annual maximum flood at the outlet section of the watershed above the hydrological station, and establish the hydrological model of the watershed above the hydrological station, so as to obtain the small watershed hydrological model parameters that can reflect the rainfall runoff process information of the small watershed to be calculated and designed. The method of calculating the hydrological frequency calculates the design rainstorm of the small watershed, and brings the design rainstorm into the well-defined small watershed hydrological model to derive the design flood process line of the small watershed. The invention realizes the design flood with higher precision that can reflect the information of the rainfall and runoff process in the small watershed through simple operations.

Description

Technical field [0001] The present invention relates to water hydrology, and in particular relates to small watershed hydraulic engineering, in particular to a method for the design flood Calculating small watershed. Background technique [0002] The current for the construction of irrigation and drainage works, bridges and culverts construction of roads and railways, urban and industrial areas and other flood control projects in the watershed, Calculating design flood of small watershed is one of the steps essential. Design Flood Calculating the small catchment is now widely used rational formula, empirical formula method, integrated unit and line method. Design storm small watershed of rational formula calculated by the storm formulation using parameter μ is worth the loss of a comprehensive law designed to calculate the net rainfall areas, small watershed is calculated by a formula Peak Flow reasoning. Rational formula calculation is simple, but it can only be calculated peak ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/27G06F30/28G06F113/08
CPCG06N3/126
Inventor 常文娟王煜韩宇平马海波严登华董鑫房昊天
Owner CHINA THREE GORGES UNIV
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