Land utilization/coverage classification method for water and soil loss monitoring in northern earth-rock mountainous area

Abstract

The invention discloses a land utilization/coverage classification method for water and soil loss monitoring in northern soil and stone mountainous areas. The method is based on a high-resolution remote sensing image and medium-scale topographic map data. A layered division extraction method is adopted; layer-by-layer control, layer by layer refinement, a quantitative and qualitative combined method are adopted to carry out three-level classification on land utilization/coverage; the first class is subjected to combining, calculating and quantitatively dividing through wave band spectrums of high-resolution remote sensing images, the second class and the third class are distinguished by adopting a qualitative classification method which comprises steps of firstly dividing water areas and water conservancy facilities, secondly dividing traffic transportation lands, thirdly dividing town lands and industrial and mining lands, and finally dividing ploughing lands, garden lands, forest lands, grasslands and other lands. The method has outstanding professional characteristics, meets the water and soil loss monitoring requirements, is clear in land utilization classification and layeringand comprehensive in content, improves the soil erosion calculation result quality, effectively evaluates the result precision, and is very necessary for researching and promoting the development ofbasic units for water and soil loss dynamic monitoring.

Description

technical field [0001] The invention belongs to the technical field of water and soil loss monitoring, and in particular relates to a land use / coverage classification method for monitoring water and soil loss in northern rocky mountainous areas based on high-resolution remote sensing images and medium-scale topographic map data. Background technique [0002] Land use classification is a comprehensive classification based on the natural and economic attributes of land and its factors. Specifically, the classification is based on the land cover characteristics, management purposes and use methods as the main basis and symbol. It reflects the development of a period of time. The actual situation of land use. The land use type refers to the unit of land with the same land use, and the unit of land with basically the same covering characteristics, management purposes and use methods is usually classified as a land use type; land cover refers to the natural or human-induced coveri...

AI Technical Summary

Problems solved by technology

Practical application proves that the existing classification of land use status cannot meet the needs of soil erosion monitoring

[0005] (2) The existing classification levels of land use status are difficult to meet the requirements of data source accuracy and soil erosion evaluation

The current land use status classification system does not further subdivide it. For example, dry land/orchard/tea garden include flat land, slope land, and terraced fields. The above three subcategories have obvious differences in their terrain, slope characteristics, and engineering measures. The combination of its three subcategories cannot accurately and effectively evaluate the state of soil erosion

Whether human activities disturb the surface or not, that is, under constructi

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