Time-varying distributed dynamic convergence calculation method

A computing method and distributed technology, applied in computing, computer-aided design, climate change adaptation, etc., can solve the problems of overestimating the confluence velocity and large errors in flood forecasting, and achieve the effect of improving accuracy

Active Publication Date: 2022-07-12
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a time-varying distributed dynamic confluence calculation method, which aims to solve the problems of overestimation of confluence velocity and relatively large flood forecast error in existing time-varying distributed unit line flood forecasting. big technical problem

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  • Time-varying distributed dynamic convergence calculation method

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[0058] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] refer to figure 1 , a time-varying distributed dynamic confluence calculation method provided by the present invention includes the following steps:

[0060] (1) Calculate basin runoff based on SCS model;

[0061] Based on the SCS model described in step (1), carry out the calculation of watershed runoff, and the specific expression is as follows:

[0062]

[0063]

[0064] In the fo...

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Abstract

The invention discloses a time-varying distributed dynamic confluence calculation method, and belongs to the field of runoff forecasting. According to the method, the terrain index is introduced to describe the spatial non-uniform distribution of the watershed grid water storage capacity, the water storage capacity of each grid can be quantitatively represented, the runoff production calculation result is combined, the watershed full storage grid and the watershed full storage grid can be divided from the grid scale, and a higher-precision input field can be provided for grid flow velocity field calculation; according to the method, a confluence velocity calculation formula considering the time-varying rainfall intensity and the soil water content is provided, and the spatial distribution rule of the flow velocity field is described more accurately; according to the method, the dynamic confluence paths of the drainage basin under different full storage proportions are deduced based on the theoretical basis of runoff production of the full storage area and no full storage and runoff production, the theoretical basis of unit line deduction is perfected, the accuracy of distributed unit line confluence time calculation is improved, the problem that the flood peak of traditional distributed unit line forecasting is large is solved, and the method is suitable for popularization and application. And the flood prediction accuracy is improved.

Description

technical field [0001] The invention belongs to the field of runoff forecasting, and more particularly, relates to a time-varying distributed dynamic confluence calculation method. Background technique [0002] High-precision hydrological forecasting can provide decision-making basis for reservoir regulation, flood control and disaster reduction, and optimal allocation of water resources, and plays an important role in water resources management, water resources development and utilization, and national economic construction. Rainfall runoff modeling mainly includes two parts: runoff and confluence. Unit line is the most widely used confluence calculation method. Commonly used unit line methods include: time period unit line, instantaneous unit line, comprehensive unit line, distributed unit line, etc. [0003] The application of traditional confluence methods has certain limitations. The main problem is that the confluence process of the entire watershed is generalized into...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q10/04G06Q50/06G06F113/08
CPCG06F30/20G06Q10/04G06Q50/06G06F2113/08Y02A10/40
Inventor 陈璐易彬冯宝飞许银山张寒松张俊祝宾皓刘一卓郭鹤翔占挺张潇李思明杨彬林李洁宋巧郑婕杨雁飞田逸飞
Owner HUAZHONG UNIV OF SCI & TECH
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