Method for evaluating accumulated influence of road on grassland ecological sensitive area

Abstract

The invention relates to a method for evaluating accumulated influence of a road on a grassland ecological sensitive area. The method comprises the following steps: determining an evaluation range ofthe grassland ecological sensitive area; determining grassland target evaluation indexes on two sides of the road; determining a determination method of grassland target evaluation indexes on two sides of the road; obtaining an average value of each target evaluation index of a plurality of quadrat of any investigation area according to a target evaluation index determination method, further obtaining an average value of each target evaluation index of a plurality of investigation areas in the road influence area and the natural grassland area, and further obtaining relative values of grassland target evaluation indexes on two sides of the road; obtaining a comprehensive score of the grassland ecological sensitive area target evaluation index, determining the accumulated influence degree of the road on the grassland ecological sensitive area according to the comprehensive score, and performing grassland restoration by adopting different response levels according to the influence degree; the method can evaluate the accumulated influence of the road on the grassland ecosystem, and provides a certain reference basis for ecological restoration of two sides of the road.

Description

technical field [0001] The invention belongs to the technical field of ecological evaluation, in particular to an evaluation method for the cumulative impact of roads on grassland ecologically sensitive areas. Background technique [0002] Grassland is a typical ecologically sensitive area in terrestrial ecosystems. The construction of roads can affect its important service functions such as water conservation and biodiversity maintenance. However, with the gradual facilitation of transportation, a large number of grasslands, especially ecologically sensitive areas with high altitudes, are affected by the construction of roads and are facing severe challenges of grassland degradation and changes in soil physical and chemical properties. In order to reduce the impact of roads on grassland ecologically sensitive areas, various road sections are actively implementing different restoration management. For example, Sanjiangyuan and other areas have adopted restoration methods suc...

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Problems solved by technology

However, the cumulative impact of highways on grasslands is more complex and varies with the altitude of grasslands, grassland vegetation types, total road area, road traffic volume, and road construction years. Relying on experience to determine the restoration measures for grassland sensitive areas along the road belt may lead to grassland damage. Increased degradation, soil erosion and other phenomena

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