A Method for Inversion and Prediction of Water Temperature-Ice Condition in Frozen Reservoir Based on Thermal-Mechanical Coupling Model

Abstract

The invention discloses a water temperature-ice inversion and prediction method for frozen reservoirs based on a thermal-mechanical coupling model. By processing the thermal-mechanical coupling model constructed by a hydrodynamics module, a water temperature module and an ice module, the hydrodynamics-water temperature ‑Ice coupling is taken into account, which can realize the thermal evolution process of water temperature and ice condition of different types of frozen reservoirs in high and cold regions, so as to realize the inversion and prediction of water temperature and ice condition distribution of frozen reservoirs, and provide effective information for reservoir construction. data support.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and relates to the inversion and prediction of the water temperature-ice condition of a frozen reservoir, in particular to a method for the inversion and prediction of the water temperature-ice condition of a frozen reservoir based on a thermal-mechanical coupling model. Background technique [0002] Ice is an important form of water resources, commonly found in cold or high latitude regions, and plays a pivotal role in the hydrological cycle. In the area north of 30°N in my country, there will be different degrees of ice phenomena every winter, accounting for about 70% of the country's land area. It is well known that the construction of reservoirs has significantly changed the hydraulic and hydrological characteristics of rivers. At the same time, these changes directly affect the thermal process of the reservoir and its upstream and downstream channels. It is worth notin...

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Problems solved by technology

In this field, the existing studies on ice water in reservoirs mainly focus on empirical formulas and simplified mathematical models, and most of them only focus on the thermal generation and dissipation process of ice sheets. For example, the degree-day method only considers the thermal changes of ice at local locations , the vertical one-dimensional water-temperature-ice-condition coupled mathematical model of the reservoir cannot capture the spatial difference between ice and water, and even the vertical two-dimensional CE-QUAL-W2 ice sheet models do not consider the interaction and transformation between ice and water. This makes it impossible to invert and effectively simulate the entire process of ice, water and heat in frozen reservoirs

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