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A runoff calculation method considering the probability distribution of flow storage depth in the largest depression

A technology of probability distribution and flow calculation, applied in design optimization/simulation, hydraulic model, etc., can solve problems such as great uncertainty in flow storage depth and influence on flow production model simulation process

Active Publication Date: 2021-02-02
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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Problems solved by technology

However, in the actual runoff production process of a watershed, the depth of the maximum flow storage depth in the deepest depression in the watershed is very uncertain. The flow process will also occur at the same time, thus affecting the final runoff model simulation process

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  • A runoff calculation method considering the probability distribution of flow storage depth in the largest depression
  • A runoff calculation method considering the probability distribution of flow storage depth in the largest depression
  • A runoff calculation method considering the probability distribution of flow storage depth in the largest depression

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Embodiment

[0052] In the present invention, in the actual hydrological model runoff calculation, the probability distribution of the maximum depression flow storage depth in the calculation unit is considered, which can effectively solve the problem that the runoff model cannot produce runoff when the depression storage flow is small, and provides a basis for watershed hydrology. This model provides a new way of thinking for the study of abortion.

[0053] Such as figure 1 As shown, the present invention provides a calculation method for flow production considering the probability distribution of the maximum depression storage depth, including the following steps:

[0054] S1, assuming that the maximum depression storage depth in the calculation unit has a certain probability distribution, and the characteristic parameters such as the average value (hssm), maximum value or minimum value under the probability distribution are used as input values ​​for model calculation;

[0055] S2, for...

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Abstract

The invention discloses a runoff calculation method considering the probability distribution of the maximum depression flow storage depth, and relates to the field of hydrological model parameter setting; after considering the uncertainty of the parameter of the maximum depression flow storage depth, the method assumes The depth of flow storage in depressions on the cushion surface presents a certain probability distribution within a certain range, so that the improved runoff model can effectively solve the problem that the calculation unit cannot produce flow when the flow generation model of the basin has a small storage flow in the depression, and allows the model's The mechanism is closer to the actual runoff process, which provides a new way of thinking for the mechanism research and parameter setting research of the watershed hydrological model.

Description

technical field [0001] The invention relates to the field of hydrological model parameter setting, in particular to a runoff calculation method considering the probability distribution of flow storage depth in the largest depression. Background technique [0002] The main factors affecting runoff production in the watershed can be summarized into five types: rainfall, land cover, topographic features, soil types, and human activities. According to the source of runoff, the runoff in the basin can be divided into three types: surface runoff, soil flow and underground runoff. [0003] In the simulation of surface runoff process, the maximum depression flow storage depth hssm is an important parameter, which determines the surface water storage capacity, and this parameter has a large uncertainty in the calculation unit. Influenced by factors such as infiltration, net rainfall (including snowmelt), and initial depression storage depth, after a precipitation process, before cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20E02B1/02
CPCE02B1/02
Inventor 周祖昊刘扬李刘佳嘉王浩贾仰文刘琳蔡静雅徐东坡
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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