Improved water environment safety evaluation analysis method
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A technology of safety evaluation and analysis method, applied in the field of water environment safety evaluation and analysis
Active Publication Date: 2013-11-20
光大理工环境技术研究院(青岛)有限公司
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In fact, there is a close interaction between the influencing factors that affect the safety of the water environment. For example, the material of the pipeline in the urban water supply system is closely related to the age of the pipeline. As the age of the pipeline becomes longer, the material of the pipeline Continuous aging, so that the two factors together affect the safety state of the water quality of the water supply system. There are many examples of this superimposed effect in real life. From this perspective, the error of the water quality safety evaluation model based on the AHP is obvious. is inevitable
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Embodiment 1
[0056] An improved water environment safety evaluation and analysis method of the present invention specifically includes the following steps:
[0057] Step 1. Determine the objectives and evaluation factors, that is, establish a hierarchical structure:
[0058] The research object to be analyzed is usually affected by multiple influencing factors. Because the water supply system is complex and huge, and the surrounding environment is changeable, the impact mechanism on the water supply quality is also very complicated. Therefore, in order to accurately evaluate the state of the water environment, it is first necessary to establish an evaluation index system that can fully reflect the state of the water environment. The top layer generally has only one factor, which is the goal of the system, called the target layer A; the middle layer is the criterion, also called the constraint layer B, whose main purpose is to ensure the realization of the overall goal of the main system l...
Embodiment 2
[0104]The present invention takes a certain block of the urban water supply system of a certain city as the research object (the water supply area south of Jingshi Road, north of Jiefang Road, west of Erhuan East Road, and east of Lishan Road), such as figure 2 The water supply area is about 62 square kilometers (6,189,972 square meters), and the length of the water supply pipe (DN15-DN1200) is about 108 kilometers. The water supply pipe materials include PE, cast iron, galvanized, ductile iron, steel, PVC, and UPVC. Cast iron 63642.05 meters, galvanized 13033.64 meters, ductile iron 5508.367 meters, steel 235.195 meters, PVC 698.027 meters, UPVC 125.664 meters. On the basis of field investigation and data collection, the index system that affects the water quality safety evaluation of the urban water supply system in a certain city is preliminarily determined (see image 3 ).
[0105] Specific steps are as follows:
[0106] First, when constructing the judgment matrix, the...
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Abstract
The invention belongs to the evaluation technical field, and particularly relates to an improved water environment safety evaluation analysis method. The improved water environment safety evaluation analysis method includes the steps of based on the relation of interaction between influence factors, based on the combination of the improved network analysis method and fuzzy mathematics, mainly on the basis of building system network analysis, carrying out pairwise comparison on the influence factors under different criterions, obtaining weight vectors comprising the interaction, combining fuzzy vectors obtained through the fuzzy evaluation method to carry out calculation and analysis, and finally obtaining the safety evaluation results. The improved water environment safety evaluation analysis method is accurate in evaluation result, improves the pre-alarm accuracy, achieves the aim of building a water quality safety evaluation model, increases the time correction value and ensures that the weight vectors can accurately and always reflect the relative importance degrees between the influence factors at different moments.
Description
technical field [0001] The invention belongs to the field of evaluative technology, and in particular relates to a water environment safety evaluation and analysis method based on an improved network analysis method combined with fuzzy mathematics. Background technique [0002] Water environment assessment system modeling is an important content in the field of urban water supply water quality security research. Through the analysis of the online monitoring data of the urban water supply quality, the timely safety status of the water supply quality can be obtained. At present, there are already mature commercial analysis software combined with water quality monitoring equipment to analyze the water quality data of urban water supply, but most of the current evaluation systems use single water quality indicators for standard comparison or analysis based on comprehensive evaluation methods based on analytic hierarchy process, such as Zhejiang University Ji Haifeng mentioned t...
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