Method for calculating heat conduction flux of riverbed and water body in data-free area

Abstract

The invention relates to a method for calculating the heat conduction flux of a riverbed and a water body in a data-free area. The method comprises the steps of fitting annual temperature changes, calculating a dimensionless temperature value and a dimensionless water temperature value, calculating the heat content of the riverbed, calculating the heat content difference at different times, calculating the heat conduction flux of the riverbed and establishing a relation curve of the temperature and the heat conduction flux of the riverbed. According to the method, the riverbed heat conductionflux of a data-free area can be evaluated according to the air temperature process without measuring or calculating the temperature of soil bodies of different depths of the riverbed, and calculationis accurate and efficient; meanwhile, the invention provides a relation curve of the water temperature and the air temperature and a relation curve of the riverbed heat conduction flux and the air temperature, and the change process of the water temperature or the riverbed heat conduction flux at different periods of time can be effectively estimated.

Description

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

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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