Calculation method of non-parametric conceptual hydrological model based on gis
A hydrological model and calculation method technology, which is applied in the fields of calculation, electrical digital data processing, geographic information database, etc., can solve the problems of difficult debugging, unstable and non-unique parameters related to parameters and parameters, and small amount of information, etc. The effect of uncertainty
Inactive Publication Date: 2018-10-26
SICHUAN UNIV
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Problems solved by technology
Calibration of model parameters is itself a very complicated and difficult link, the more parameters there are, the more difficult it is to debug
Due to the large number of parameters and the small amount of information, it is easy to have problems such as correlation between parameters, instability and non-uniqueness of parameters themselves.
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[0068] The specific implementation of the present invention will be described in conjunction with the examples.
[0069] Take the Baisha River in the upper reaches of the Minjiang River as an example: the Baisha River is a first-class tributary on the left bank of the upper reaches of the Minjiang River, originating from Chaping Mountain at the junction of Dujiangyan City and Wenchuan. The geographical location is between 103°34′~103°43′ east longitude and 31°01′~31°22′ north latitude, and the control station is the downstream Yangliuping hydrological station. According to the spatial data obtained by GIS, the rain collection area of the study area is 359.4km 2 , the main river is 45.9km long, the average gradient of the river course is 49.3‰, the total length of the river network is 305.5km, and the average elevation of the watershed is 2665.9m. Vegetation is dominated by temperate coniferous forest and broad-leaved forest, accounting for 82.6% of the vegetation area in th...
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The invention relates to a hydrological model and specifically relates to a non-parametric conceptual hydrological model based on a GIS. The model comprises two main modules including a runoff generation calculation module and a conflux calculation module, wherein the runoff generation calculation module comprises three steps including plant entrapment, depression filling and water source division; the conflux calculation module comprises two steps including slope conflux and river network conflux; and total river network inflow is finally formed through runoff generation calculation and conflux calculation. During establishment of the hydrological model, parameters of the model are quantified as much as possible in combination with GIS technologies, so that uncertainties of parameter debugging of the model can be reduced. In comparison with conceptual hydrological models which are widely applied at present, the model makes up defects in the traditional conceptual hydrological models that too many parameters exist; physical meanings of the parameters are not definite enough; and a lot of uncertainties are brought by the parameter debugging, etc.
Description
technical field [0001] The invention relates to a hydrological model, in particular to a calculation method of a GIS-based non-parameter conceptual hydrological model. Background technique [0002] The watershed hydrological model refers to the mathematical structure with physical meaning and logical generalization established by computer simulation of the hydrological process of the watershed. Since the 1970s, hydrologists at home and abroad have proposed many watershed hydrological models, among which the Xin'anjiang model (Zhao Renjun, Hohai University, China, 1973), the TANK model ( 1961, Sugawara Masaki, Japan National Disaster Prevention Center, Japan), MIKESHE (1985, Danish Water Conservancy Research Institute), etc. [0003] At present, the most representative conceptual hydrological model in China is the Xin'anjiang model. The Xin'anjiang model includes four calculation steps: evapotranspiration calculation, basin runoff calculation, water source division, and flo...
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IPC IPC(8): G06F17/30
CPCG06F16/29G06F2219/10G16Z99/00
Inventor 周宏伟梁煜峰周家文弓瑞王佳美霍苗林星
Owner SICHUAN UNIV