Drainage basin ecological space layout evaluation method

Abstract

The invention discloses a drainage basin ecological space layout evaluation method, which comprises the following steps: collecting drainage basin ecological space data, calculating multi-index evaluation parameter characteristics in different time periods according to the drainage basin ecological space data, and constructing a drainage basin ecological space multi-parameter evaluation model according to the calculated multi-index evaluation parameter characteristics. The multi-parameter evaluation model adopts an entropy weight method to normalize indexes in parameter characteristics and determine entropy weight, and comprehensive evaluation of the ecological space layout of the drainage basin in different time periods is completed; according to the method, the ecological drainage basin is analyzed by adopting multi-sample data, fragmentation of the ecological layout of the drainage basin is analyzed and improved from multiple angles, a multi-parameter evaluation model is constructed, objective parameter weights are determined by adopting an entropy weight method, the problem of high subjectivity of weight determination is solved, and the evaluation method with high universality is obtained; and the evaluation result is used for reasonably planning the ecological space of the drainage basin, and reference and basis can be provided for next ecological planning locally in combination with future climate scene analysis, so that the method has remarkable practical significance.

Description

technical field [0001] The invention relates to the field of watershed ecology, in particular to an evaluation method for ecological space layout of a watershed. Background technique [0002] The ecological spatial pattern needs to be constructed, but in fact, many existing ecological patterns are unreasonable due to human interference. To construct a reasonable ecological spatial pattern, it is necessary to delineate the ecological protection red line as soon as possible, which includes important water conservation, biodiversity maintenance, Areas with important ecological functions such as water and soil conservation, windbreak and sand fixation, and areas with sensitive and fragile ecological environments such as water and soil erosion and land desertification. Therefore, in practical applications, it is necessary to evaluate various indicators in the watershed to achieve the purpose of rationally improving the layout. [0003] There are many existing methods for evaluat...

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Problems solved by technology

[0003] There are many existing methods for evaluating the ecological spatial layout of watersheds. Different evaluation methods have different results due to different selection models and indicators, but they also have their own limitations. For example, the prohibited development area The evaluation of ecological sensitivity is obtained through superposition analysis. This evaluation method does not start from the perspective of the integrity of the ecological system and the law of natural circulation, which often leads to the fragmentation of the obtained ecological space layout.

[0004] So far, although there are many existing methods for evaluating the ecological spatial layout of watersheds, there are defects and deficiencies in the overall and comprehensive evaluation technical methods for the spatial layout of ecological watersheds, and there are few types of data samples in the evaluation methods. And most of them are a summary of the experience of a certain ecological watershed, the determination of data weight is highly subjective, and it is not suitable for application to other regions

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