Data acquisition and analysis method for river valley grassland degeneration conditions

Abstract

The invention discloses a data acquisition and analysis method for river valley grassland degeneration conditions. The method specifically comprises the following steps of: NDVI data obtaining, DEM data obtaining, information processing, data conversion, vegetation coverage inversion, grassland degeneration grading, grassland degeneration cold / hot spot analysis, grassland degeneration temporal andspatial variation analysis, grassland degeneration cold / hot spot distribution and evolution, river valley grassland degeneration altitude differentiation, grassland coverage analysis and grassland degeneration factor analysis. Through a grassland degeneration grading map, the method is capable of integrally analyzing areas with obvious grassland degeneration grades in tested areas, so that the data analysis is more intuitional; cold / hot spot analysis indicates that the spatial difference between grassland degeneration and improvement is more obvious; through grassland coverage analysis, degeneration features of grasslands with different coverage grades can be quantitatively analyzed and expressed; and through analysis of climate temperatures, rainfall capacities and grazing conditions, the analysis of the grassland degeneration conditions is more correct.

Description

technical field [0001] The invention relates to the technical field of grassland degradation and improvement, in particular to a method for collecting and analyzing information and data of grassland degradation in river valleys. Background technique [0002] Under irrational use, the process of retrograde succession and productivity decline of grassland ecosystems is called grassland degradation, also known as grassland degradation. The main manifestations are the decline of the height, coverage, yield and quality of grassland vegetation, the deterioration of soil habitat, and the decline of production capacity and ecological function. The long-term and large-scale grassland degradation not only causes the decline of the productivity of the grassland itself, but also causes the deterioration of the ecological environment and threatens the survival and development of human beings. Under the influence of unfavorable natural factors such as drought, wind and sand, water erosio...

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Problems solved by technology

[0003] The impact of grassland degradation on the environment is particularly severe. The existing methods for collecting and processing grassland degradation information are too simple and have low applicability

However, there are many river valleys in my country, and the ordinary grassland degradation information collection and processing methods cannot conduct reasonable analysis for the more complex terrain in river valleys, the data is inaccurate, and the results of data processing are low in accuracy and reliability, and cannot be applied to river valley grasslands. manage

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