Method for simulating and calculating ice thickness change of reservoir based on thermodynamic principle

Abstract

The invention relates to a method for simulating and calculating the ice thickness change of a reservoir based on a thermodynamic principle. The method comprises a method for calculating the ice thickness in an ice cover growth process or / and a method for calculating the ice thickness in an ice cover melting process. According to the method, more research on icing of reservoirs, lakes and rivers in the prior art is concentrated in the ice cover growing period, research on the ice thickness in the ice cover melting period is few, and an ice thickness calculation formula in the ice cover melting process is provided on the basis of the thermodynamic principle under certain assumption conditions. The method of the valve is simple in input condition, mainly including meteorological data such as air temperature, relative humidity and solar radiation, and the calculation result is relatively reliable.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering of lakes and reservoirs in alpine regions, in particular to a method for simulating and calculating changes in reservoir ice thickness based on thermodynamic principles. Background technique [0002] The cascade development of water conservancy and hydropower continues to advance to rivers in high-altitude and high-latitude areas, and the reservoir will face the problem of freezing. Freezing is a common natural phenomenon in winter in cold regions. Rivers, reservoirs, and lakes often form ice sheets in winter. The emergence of ice sheets changes the water flow from an open flow to a closed undercurrent, changes the hydraulic conditions, thermal conditions, and geometric boundary conditions of the water flow, forming a unique ice phenomenon in winter. [0003] In the study of ice in rivers, reservoirs and lakes, ice thickness is a very important factor. On the one hand, ...

AI Technical Summary

Problems solved by technology

At present, many scholars at home and abroad have used prototype observations, experiments, etc. to study ice thickness, established physical equations to describe ice thickness changes, and obtained empirical formulas for predicting ice thickness changes by assuming physical equations. The influence of water temperature is ignored in the derivation process of , and there is a lack of experimental verification of the assumption of linear temperature in ice

Images