Distributed hydrological model digitalization method for complex underlying surface city area

A distributed hydrology and urban area technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as lack of experience in digital refined input of drainage systems, improve model input accuracy, optimize simulation effects, enhance The effect of suitability

Active Publication Date: 2018-01-09
HEBEI UNIV OF ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For distributed hydrological models, there is currently a lack of a set of model data processing methods that are generally applicable to complex underlying urban areas, especially for urban built-up areas, the technical experience of watershed division and drainage system digital fine-grained input lacking
In addition,

Method used

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  • Distributed hydrological model digitalization method for complex underlying surface city area
  • Distributed hydrological model digitalization method for complex underlying surface city area
  • Distributed hydrological model digitalization method for complex underlying surface city area

Examples

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Example Embodiment

[0027] Example one:

[0028] This embodiment is a case of applying the model digitization method in the core area of ​​an economic development zone in Beijing, such as figure 1 As shown, the technical process includes: the collection and sorting of basic data 1, the rationality analysis and review of the basic data is realized with the help of field survey 2, and the complex underlying surface of the urban area is divided into drainage areas after preliminary processing 3. The drainage area is divided according to the distribution of land types, which is the process of rough delineation of the subcatchment area. 4. The land types of the subcatchment area are relatively concentrated but still cannot meet the simulation accuracy. The method to improve the model simulation accuracy The sub-catchment area can be further divided into subcatchment unit refinement process 5, the 3 to 5 processes belong to this method of catchment area refinement treatment process; the subcatchment area f...

Example Embodiment

[0034] Embodiment two:

[0035] Such as figure 2 As shown, this embodiment is an improvement of the first embodiment, and is a refinement of the drainage system in the first embodiment. This embodiment also takes the typical urban area in the first embodiment as an example. The drainage pipes (nets), rainwater wells, and rainwater collection points connect the subcatchment areas together. The drainage pipes in the core area involve 47 different specifications of 4 types of materials, including steel pipes, concrete pipes, reinforced concrete pipes, and ordinary cast iron pipes. The pipe materials will affect the setting of parameters such as the Manning coefficient of the model pipeline. Affect the generalized pipeline shape parameters of the model. In addition, the rivers, ditches, and hardened roads in the core area are unified and generalized into drainage pipelines, and the corresponding attributes are stored in a digital format in the GIS.

[0036] On the basis of the origi...

Example Embodiment

[0037] Embodiment three:

[0038] This embodiment is an improvement of the second embodiment, and is a further refinement of the drainage system in the second embodiment. The refined processing of the drainage system described in this embodiment also involves topology inspection and error processing.

[0039] Such as image 3 As shown, the distributed hydrological model requires high input data. Take the inspection and correction of the topological relationship of the drainage pipe (network) as an example. The set topology tolerance is 0.001m. First use the topology inspection tool in ArcGIS to perform Preliminary selection of pipe network data, automatic identification and correction of overlapping or unconnected pipe sections, correction of connection errors, overlapping points, lines, and surfaces, and selection of reasonable available pipe networks; re-use of the pre-run self-check function of the hydrological model , Locate the location of the problem in the model topology i...

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Abstract

The invention discloses a distributed hydrological model digitalization method for a complex underlying surface city area. The method comprises the following steps of performing basic data collectingand sorting; performing site survey; performing drainage area division; performing sub water catchment area division; performing sub water catchment unit refinement; performing flow collection point generalization; performing drainage pipeline (network) generalization; performing drainage system refinement processing; and performing model digitalization input. The method has the advantages that through high-precision generalization and digitalization processing, the authenticity and reliability of data, needed to be input, of a distributed hydrological model are realized, and actual underlyingsurface conditions of the city area are restored and simulated as far as possible; the method can be applied to the model digitalization input of the multi-land use type cross distribution city built-up area; and by virtue of an ArcGIS technology and an RS technology, the generalization precision of digitalization of sub water catchment regions and drainage systems in a city range is improved, and the technical problems of hydrological process simulation and the like of the distributed hydrological model in the large-scale complex underlying surface city built-up area under the background ofstrong human activity influence are solved.

Description

technical field [0001] The invention relates to the technical field of oil and gas well safety, in particular to a method for digitizing distributed hydrological models of complex underlying surface urban areas. Background technique [0002] Distributed hydrological model is an important tool that can simulate complex hydrological phenomena and processes, and research and establish hydrological change laws. Its characteristic is that it can reflect the spatial heterogeneity of hydrological processes by means of discrete hydrological units. On the one hand, the complexity of urban built-up areas is reflected in the impact of strong human activities, which have changed the natural underlying surface conditions; on the other hand, the types of construction land (such as residential land, land for public services and commercial service facilities, etc.) Diversity. There are differences in the spatial layout and area ratio of the permeable and impermeable areas in different land ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 栾清华付潇然王海潮刘家宏王英吕烨张坤王东马骏
Owner HEBEI UNIV OF ENG
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