Evaluation index system for land degradation in Xinjiang

Abstract

The invention relates to a set of evaluation systems for a land degradation degree. At present, the existing land degradation evaluation method has poor operability and practicality and quantitative and visual land degradation degree data can not be formed. According to the invention, the provided evaluation index system aims at collecting land degradation evaluation indexes by applying a generalized induction method to construct a preset index set of land degradation. Experts engaged in research of land degradation are employed; on the basis of the natural condition, the social situation and the land quality in Xinjiang, the preset index set is screened by employing a Delphi method and the structure of the index system as well as weights of all indexes are determined, so that a land degradation evaluation index system of Xinjiang is constructed. And the land degradation degree of Xinjiang is evaluated based on 11 farmland and non-farmland evaluation indexes including vegetation coverage, a land occupation rate of saline alkaline spots, drainage density, landform, a soil texture, a treatment engineering measure, annual precipitation, a crop yield descent rate, gradient, poverty, a treatment engineering measure, and a cultivation measure.

Description

technical field [0001] The invention relates to a set of evaluation system of land degradation degree. Background technique [0002] Land degradation is primarily manifested in the reduction or loss of the biological or economic productivity and value of land. Land degradation has many manifestations, including soil degradation, vegetation degradation, reduction or loss of biodiversity, and reduction or loss of land use value. [0003] Great progress has been made in the theory and method of land degradation assessment at home and abroad, which is reflected in the "World Atlas of Desertification" published in 1997 and the assessment of land degradation in other regions. There are currently three evaluation theories, namely Global Anthropogenic Soil Degradation (GLASOD), South and Southeast Asian Anthropogenic Soil Degradation (ASSOD), and the evaluation method proposed by the Russian Academy of Sciences (RUSSIA). [0004] In practice, these three theories are all based on ...

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For the evaluation and monitoring of land degradation, the indicator syst

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