Estimation model of wind erosion rate including gravel and vegetation factors and its construction method
A technology for estimating models and gravels, which is applied in the field of wind erosion rate estimation models including gravel and vegetation factors and its construction, can solve problems such as inaccurate wind erosion intensity estimation, and achieve the effect of easy parameters, simple calculation process, and clear relationships
Active Publication Date: 2022-03-04
河北省科学院地理科学研究所
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to provide a wind erosion rate estimation model including gravel and vegetation factors and its construction method to solve the problem of inaccurate wind erosion intensity estimation in existing wind erosion models
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0051] Such as figure 1 Shown, the construction process of soil wind erosion rate estimation model of the present invention is as follows:
[0052] ① Construction of basic wind erosion rate estimation model:
[0053] The wind erosion rate of the bare surface is generally expressed by the single-width sediment transport rate, which means the sand transport volume per unit width and unit time. Based on the sand transport equation combined with the wind tunnel experimental data, the basic wind erosion rate estimation model is constructed as follows:
[0054]
[0055] In the formula, Q 0 is the wind erosion rate of bare ground (kg m -2 the s -1 ); 0 is the sand delivery rate on bare ground (kg m -1 the s -1 ); L is the length of the bed surface (5m); d is the average particle size (mm); D is the standard sand particle size (0.25mm); ρ is the air density (1.29kg m-3 ); g is the acceleration due to gravity (9.8m s -2 ); u * is the frictional wind speed of incoming flow (...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to a wind erosion rate estimation model including gravel and vegetation factors and a construction method thereof, the construction method comprising: a, construction of a basic wind erosion rate estimation model, b, input of vegetation coverage factors, c, gravel coverage The input of factors, d, the input of comprehensive effect factors of vegetation and gravel cover, e, the construction of the wind erosion rate estimation model of vegetation and gravel covering the surface together. The present invention is based on the results of wind tunnel simulation experiments, by first constructing a basic wind erosion rate estimation model, and then gradually adding vegetation coverage factors, gravel coverage factors, gravel and vegetation coverage comprehensive effect factors to the basic model, and finally constructs an applicable wind erosion rate estimation model. A semi-empirical wind erosion model covering wind speed, vegetation coverage and gravel coverage in the Gobi and desert steppes of northern China. The invention is established according to the Gobi and desert grasslands in northern China, has clear structure, clear relationship of wind erosion factors, easy acquisition of parameters, simple calculation process, and is suitable for calculating and predicting wind erosion rates of Gobi and desert grasslands in northern China.
Description
technical field [0001] The invention relates to the construction of a soil wind erosion model, in particular to a wind erosion rate estimation model including gravel and vegetation factors and a construction method thereof. Background technique [0002] Soil wind erosion is an important type of soil erosion, and 2 / 3 of the countries and regions in the world suffer from it. Recognizing the influence of various wind erosion factors on wind erosion rate and constructing an accurate wind erosion rate estimation model is the premise and basis for scientific prevention and control of soil wind erosion. Many scholars at home and abroad have carried out relevant research, and found that wind, vegetation, gravel, soil and other factors can significantly affect wind erosion. Among them, wind is the key factor that determines the strength of wind erosion; rough interference factors such as vegetation, gravel, and soil clods are key factors that weaken wind erosion; factors such as soi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10G06F113/08
CPCG06F30/20G06F2111/10G06F2113/08
Inventor 李庆王仁德张春来李童洲查慧敏周娜
Owner 河北省科学院地理科学研究所