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Flood estimation method for drainage basin lacking actual measurement runoff data based on regional division

A technology of regional division and the first watershed, applied in calculation, special data processing applications, instruments, etc., can solve problems such as inability to visualize the similarity relationship, and achieve a reliable effect of the regional flood model

Pending Publication Date: 2019-08-09
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

The clustering algorithm needs to pre-set the number of classifications, which introduces human subjective factors; in addition, the clustering algorithm cannot visually present the similarity relationship between watersheds

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  • Flood estimation method for drainage basin lacking actual measurement runoff data based on regional division
  • Flood estimation method for drainage basin lacking actual measurement runoff data based on regional division
  • Flood estimation method for drainage basin lacking actual measurement runoff data based on regional division

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Embodiment Construction

[0045] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0046] The method provided by the embodiment of the present invention includes step A: obtaining historical flood event data of multiple first river basins within a first time range in a predetermined region;

[0047] Wherein, the plurality of first watersheds are watersheds with measured runoff data, meteorological data, and geographic information data within the first time range. (The geographic information data includes basin area and elevation data. The measured runoff data is hydrological data.)

[0048] Furthe...

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Abstract

The invention provides a flood estimation method for drainage basin lacking actual measurement runoff data based on regional division. The method comprises the following steps: A, acquiring historicalflood event data of a plurality of first basins within a first time range in a predetermined region; B, constructing a watershed complex network in a predetermined region; C, performing regional division on the drainage basin in the predetermined region by utilizing a cluster recognition algorithm; D, establishing an intra-regional flood estimation model; and E, carrying out design flood estimation on the second drainage basin in the predetermined area by adopting an intra-area flood estimation model. According to the method, the watershed with the same flood seasonal property is classified through the flood concurrency characteristics, the watershed flood characteristic homogeneity in the region is ensured, and the regional flood model is more reliable. A cluster recognition algorithm isadopted, manual setting of the drainage basin classification number is not needed, the classification result can filter out the category (such as the category only containing one drainage basin) withthe small drainage basin number, and the drainage basin homogeneity in the large category is guaranteed.

Description

technical field [0001] The invention belongs to the field of meteorology and hydrology, especially flood estimation. Background technique [0002] Flood is one of the most important natural disasters in the world. Flood design standards are required for downstream flood control of hydraulic engineering and flood control of hydraulic structures. The core problem of design flood is the calculation of the flood frequency of the watershed, that is, the magnitude of the flood corresponding to a certain return period (such as once in a hundred years), where the watershed is defined as the surface catchment area surrounded by watersheds. However, in data-deficient watersheds (defined as watersheds with insufficient runoff observations, but with other information such as watershed area, elevation, drought index, precipitation, etc.), design floods can only be estimated using information from observations at adjacent watershed hydrological stations , so the regional flood frequency ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 杨汉波杨文聪杨大文
Owner TSINGHUA UNIV
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