A SIMULATION METHOD FOR THE DEVELOPMENT PROCESS OF Ice REGION IN WINTER IN DURABLES IN DATA LACKING AREA

Abstract

The invention relates to a method for simulating the development process of ice conditions in winter in rivers and canals in data-deficient areas. Water temperature change, determine the heat transfer coefficient h of the river wa , j wa and k wa ; and the critical Froude number and the maximum Froude number Fr m , determine the ice sheet development model, and simulate the ice evolution process. According to the simulation of the measured flow and water level, the present invention deduces a new method of flow distribution along the way, which ensures the balance of calculated river flow. In addition, the present invention aims at the difference of solar reflectance in different time periods and different ice conditions, The coefficient reflecting the solar reflectance is deduced through the model rate determination, and then the time-average solar radiation value per unit area is calculated, which solves the problem of lack of solar radiation data in the calculation of ice conditions. In this way, the development and evolution of ice conditions of rivers, rivers, and canals can be calculated more accurately under the condition of incomplete calculation data, and scientific references can be provided for winter regulation, disaster assessment and prevention of northern rivers and canals.

Description

technical field [0001] The invention relates to a method for simulating the development process of winter ice conditions in rivers and canals in data-deficient areas, and belongs to the technical field of water conservancy engineering. Background technique [0002] In summary, the development and evolution of river ice includes: flow, ice sheet formation, ice sheet heat growth and closure of rivers, ice sheet thermal attenuation and melting of river openings, etc., which are complex hydrology, meteorology, hydraulics, thermodynamics and dynamics interactions. As a result, there are currently systematic one-dimensional mathematical models that can simulate ice evolution. The one-dimensional model of the system can be traced back to the RICE model developed by Shen of Clarkson University in the United States, and then improved to the one-dimensional RICEN model. On this basis, the one-dimensional ice-water dynamics model developed by Yang Kailin et al. realized the simulation...

AI Technical Summary

Problems solved by technology

However, in the 1990s, the Yellow River Water Conservancy Committee cooperated with Finland and Shen (1994, 1996) of the United States to develop empirical mathematical models for ice forecasting in the lower reaches of the Yellow River. To meet the demand for measured data in the calculation, and because the Yellow River is a wandering river, the river bed changes rapidly, and the model cannot be used in actual operation after the completion of the model

At present, natural rivers generally have incomplete or missing measured data, difficult to measure river data, and hydraulic structures built on the river, which make the change of the river flow state greatly influenced by human factors and other conditions.

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