A method for measuring wind erosion of soil in a plot

Abstract

The invention provides a measuring method of amount of soil wind erosion in the plot, which comprises the first step, the plot for measuring and boundary are set; the second step, the soil wind corrosion circle is set; the third step, wind measuring device and collection part are installed; the fourth step, the speed and direction of the wind are counted; the fifth step, soil wind erosion material flow is corrected; the sixth step, the soil wind erosion material flow contributed by different grade of wind speed is determined, the seventh step, the eighth step, the soil wind erosion material flux is calculated; the ninth step; the relationship between the flux of the soil wind erosion material and the boundary length to the upper wind direction of the soil wind erosion circle is proposed, the length of the soil wind erosion in the plot to reach saturation state is determined; the tenth step, the length of the soil wind erosion saturation of other direction in the condition of different wind speed grade (i), the eleventh step, the irregular shape plot is converted into the equal area round plot; the twelfth step, the wind corrosion amount of different wind speed grades of each wind direction and the soil wind corrosion amount of plot are calculated.

Description

technical field [0001] The invention relates to a method for measuring wind erosion of soil, in particular to a method for measuring wind erosion of soil in actual plots. Background technique [0002] Soil wind erosion is a natural phenomenon that occurs in vast arid, semi-arid and partially sub-humid regions and even humid regions. It is related to factors such as wind, soil physical and chemical properties, and human activities that interfere with the original soil structure. Land degradation caused by soil wind erosion has become a global environmental problem and a constraint factor for agricultural production. At present, the research focus on soil wind erosion in the world mainly focuses on the amount of soil wind erosion in plots. A plot refers to the smallest land unit with the same attributes. The discrimination of a plot is mainly based on the consistency of soil type, land use type, land cover and topography, and it has no clear definition on the spatial scale. ...

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Problems solved by technology

[0004] These existing technologies have the following problems: the volume of the set soil wind erosion disk should not be too large, generally 1m 2 , so it cannot reflect the soil wind erosion situation in the plot, let alone the typical soil wind erosion situation in the whole area, and the measurement process does not incorporate information such as wind direction and wind speed, so more accurate data cannot be obtained

The estimation of the annual wind erosion of farmland soil disclosed in Chinese patent CN103454063A can only estimate the average wind erosion of a certain period of time in the plot; in this method, the size of the erodible particles in the measured plot directly determines the wind erosion of the soil The key parameters of the estimated value, and the erodible particle size in different plots cannot be accurately calculated at present

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