Remote Sensing Dynamic Monitoring Method of Soil Erosion Based on Modified Universal Soil Erosion Equation

Abstract

The invention discloses a water loss and soil erosion remote-sensing dynamic monitoring method based on a modified universal soil loss equation, which includes the implementation steps: 1) acquiring a rainfall erosivity factor, a soil erodibility factor and a terrain factor; 2) acquiring remote sensing images of a to-be-monitored area, performing land use / coverage category division according to the remote sensing images to obtain multiple land categories, and respectively estimating a vegetation coverage-management factor of each land category so as to obtain a comprehensive vegetation coverage-management factor; 3) extracting characteristic information affecting water and soil conservation from the remote sensing images, and estimating a water and soil conservation measure factor according to the characteristic information affecting water and soil conservation; and 4) calculating an average annual soil loss amount estimated value of the to-be-monitored area according to the modified universal soil loss equation, and outputting the value. The water loss and soil erosion remote-sensing dynamic monitoring method based on the modified universal soil loss equation has the advantages of reasonable estimated result, high universality, suitability for long-term dynamic monitoring of water loss and soil erosion in the area and wide application range.

Description

technical field [0001] The invention relates to the field of water and soil loss risk assessment, in particular to a remote sensing dynamic monitoring method for water and soil loss based on a modified general water and soil loss equation. Background technique [0002] Soil erosion refers to the movement of soil out of the soil due to water erosion or wind force, resulting in a decline in soil fertility, serious or even complete loss of soil fertility. The demise of the ancient Babylonian kingdom was caused by soil erosion and environmental damage. In the early 1930s, serious soil erosion also occurred in the United States. However, the government, all social strata and the public have attached great importance to it and taken strong soil and water conservation measures, which have well controlled soil erosion. Soil erosion is very serious in our country. The Yellow River Basin is the most obvious example. Huge sediment flows from the Gobi, grasslands, and Loess Plateau i...

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Problems solved by technology

[0011] Due to the difficulty of obtaining data, the existing methods can only obtain the amount of soil erosion through field measurement in a small area. If it is in a large area, the amount of soil erosion obtained is not objective and is quite different from the actual situation. At present, people cannot obtain large-scale Soil and water loss information with clear scientific basis, let alone long-term dynamic monitoring of regional water and soil loss

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