A Calculation Method of Heat Conduction Flux Between Riverbed and Water Body in No Data Area

Abstract

The invention relates to a calculation method of heat conduction flux between riverbed and water body in a data-free area, including: fitting the interannual temperature change, calculating dimensionless air temperature value and water temperature value, calculating the heat content of the river bed, calculating the heat content difference at different times, and calculating The heat conduction flux of the river bed, and the establishment of the relationship curve between the air temperature and the heat conduction flux of the river bed. The present invention does not need to measure or calculate the temperature of the soil at different depths of the riverbed, and can evaluate the heat conduction flux of the riverbed in the data-free area according to the air temperature process, and the calculation is accurate and efficient; at the same time, the present invention provides the relationship curve between water temperature and air temperature and the heat conduction of the riverbed The relationship curve between flux and air temperature can effectively predict the change process of water temperature or riverbed heat conduction flux at different times.

Description

technical field [0001] The invention relates to a method for calculating the heat conduction flux between a riverbed and a water body in a data-free area, and belongs to the technical field of hydraulic engineering. Background technique [0002] The heat conduction flux of the river bed is an important part of the thermal cycle of the river water body, which can affect the winter ice production and the total energy of the water body. Heat exchange in water generally includes heat flux between water and air, heat flux between water and riverbed, water mechanical energy conversion and upstream and downstream water energy exchange. For small-scale rivers, the heat transfer flux of the river bed can account for 15% of the heat exchange of the water body, which can significantly affect the ice production process of the water body. The riverbed absorbs heat in summer, and its heat flux is positive, storing the heat of the water body in the riverbed; the riverbed releases heat in ...

AI Technical Summary

Problems solved by technology

The current research has the following limitations: First, it is impossible to evaluate the heat conduction flux of the riverbed in the data-free area, and it is impossible to evaluate the energy process of the large and small watershed rivers without data; second, the calculation or measurement workload is heavy, and the river bottom soil needs to be determined first. The temperature stratification, and then calculate the heat transfer flux of the river bed; thirdly, the correlation between the temperature and the heat transfer flux of the river bed cannot be provided, and the heat flux of the river bed cannot be predicted based on the temperature

In short, the current research cannot accurately calculate the heat flux of the river bed in the area without data, which restricts the research on the water environment and aquatic ecology of small watersheds. It is urgent to establish a calculation method for the heat transfer flux between the river bed and the water body in the area without data

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