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Method for spatial distribution of soil erosion investigation units

A unit space and soil erosion technology, applied in soil material testing, material inspection products, etc., can solve the problems of poor accuracy and high survey costs, and achieve the effect of ensuring accuracy and reducing survey costs.

Active Publication Date: 2015-06-17
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0008] In order to solve the shortcomings of poor accuracy and high survey cost in the above-mentioned existing soil erosion survey, the present invention provides a new method for the spatial layout of soil erosion survey units. By reasonably arranging field survey units in the survey area, That is, the survey cost is reduced; at the same time, the accuracy of the soil erosion survey results is guaranteed

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  • Method for spatial distribution of soil erosion investigation units
  • Method for spatial distribution of soil erosion investigation units
  • Method for spatial distribution of soil erosion investigation units

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing, operating principle and working steps of the present invention are further explained:

[0028] The invention provides a method for spatial layout of soil erosion investigation units, which comprises the following steps:

[0029] S1, such as figure 1 and figure 2 As shown, the earth is divided into zones according to the Gauss-Krüger projection zoning method, from the 0-degree meridian of the earth, every 6 degrees of longitude difference from west to east, and the obtained zone numbers are 1st, 2...60 zones The multiple six-degree zones are divided into zones from west to east at intervals of 3 degrees from the earth's 1.5-degree meridian, and multiple three-degree zones, six-degree zones, and three-degree zones are obtained with zone numbers 1, 2...120. The degree zones are marked with different colors, and the central meridian of the third degree zone coincides with the central meridian and subzone meridian of the six...

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Abstract

The invention provides a method for the spatial distribution of soil erosion investigation units, which comprises the following steps: based on a Gauss-Kruger projection zoning method, carrying out zoning on terrestrial longitudes and latitudes, dividing each three-degree zone into multiple 5 km*5 km grids as control areas, and dividing each control area into multiple 1 km*1 km grids as basic investigation units; selecting an investigation area, and generating a zoning grid layer located in the investigation area; according to a zoned longitude and latitude range, calculating the longitudes and latitudes of central points of all the control areas in the investigation area; and determining the number and positions of field investigation units according to the elevation and rainfall of the investigation area and the percentage of the area of a slope croplands in the total area of the investigation area, and according to the terrain of the investigation area, selecting small watersheds with a grid area of about 0.2-3 km<2> as field investigation units. According to the invention, due to the adoption of a stratified unequal-probability systematic sampling method, and through the field investigation units reasonably distributed in the investigation area, the investigation cost is reduced, and the accuracy of soil erosion investigation results is guaranteed.

Description

technical field [0001] The invention relates to a method for spatial layout of soil erosion investigation units, which belongs to the technical field of soil erosion investigation, in particular to the technical field of quantitative evaluation of water and soil loss. Background technique [0002] Soil erosion investigation is an important part of the special census of water and soil conservation in my country's water conservancy census. The ultimate goal is to find out the distribution, area and intensity of soil erosion in a certain area, grasp the dynamics of soil erosion, and promote digital soil and water conservation. Provide basic data for scientific evaluation of soil and water conservation benefits and ecological service value, and provide decision-making basis for national soil and water conservation and ecological construction. [0003] There are currently three main methods for regional soil erosion surveys worldwide: 1. Seamless grid estimation. The area is di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 刘宝元符素华魏欣赵莹刘和平张天宇
Owner BEIJING NORMAL UNIVERSITY
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