Method for evaluating redevelopment potential of waterfront area

Abstract

The invention belongs to the technical field of ecological and urban planning, and particularly relates to a method for evaluating the redevelopment potential of a waterfront area. By constructing a multi-dimensional evaluation system with ecological priority as a core and combining a spatial analysis technology, ecological, economic and cultural elements of the waterfront area are comprehensively analyzed and evaluated. Firstly, a research boundary and a functional unit of a waterfront area are determined; secondly, collecting multi-source data, including ecological environment, economic conditions and culture factors; then, index weights are determined through an analytic hierarchy process, and comprehensive potential modeling and spatial visualization analysis are carried out through an ArcGIS platform; and finally, proposing an optimization development strategy for high, medium and low potential areas. According to the method, the re-development potential of the waterfront region can be quantified, the key development region and the ecological restoration region can be identified, and a scientific basis and an implementation scheme are provided for region optimization planning and sustainable development.

Description

Technical Field

[0001] The invention belongs to the technical field of ecology and urban planning, and specifically is a method for evaluating the redevelopment potential of a waterfront area. Background Art

[0002] With the acceleration of urbanization, waterfront areas have become important nodes for urban development due to their unique geographical location and resource endowment. However, the traditional development model is usually oriented towards economic benefits, ignoring the core value of ecological protection, resulting in increased vulnerability of regional ecosystems and decreased environmental quality. The existing evaluation system focuses on economic or social indicators, lacks comprehensive consideration of the principle of ecological priority, and is difficult to provide scientific guidance for the sustainable development of waterfront areas. Therefore, it is urgent to construct a redevelopment potential evaluation method that comprehensively considers ecological, economic and cultural factors to provide a scientific basis for achieving coordinated regional development. Summary of the invention

[0003] The present invention provides a method for evaluating the redevelopment potential of waterfront areas to solve the problem of insufficient ecological priority in the prior art. The present invention takes ecological orientation as the core, constructs a multi-level indicator system, including three primary indicators of ecology, economy and culture; calculates the weight of each indicator through the analytic hierarchy process (AHP) to ensure the scientificity and operability of the evaluation results; combines spatial data analysis with multi-factor comprehensive evaluation to quantify the redevelopment potential of waterfront areas, and provides a scientific basis for regional planning and optimization.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method for evaluating the redevelopment potential of a waterfront area includes the following steps:

[0006] (1) Determination of objectives and scope

[0007] Objective: To build an evaluation system for the redevelopment potential of waterfront areas with an ecological orientation as the core, so as to achieve scientific planning and sustainable development of the region; Scope: The research scope covers the waterfront area, including the area extending 500 meters inland from the coastline and 500 meters in the sea; considering the multi-dimensional factors such as the ecological environment, social economy, and cultural characteristics in the region, to build a comprehensive evaluation framework covering ecological restoration, economic development, and cultural improvement;

[0008] (2) Evaluation model

[0009] By constructing a multi-level index system of indicators in three dimensions, namely ecology, economy and culture, and constructing evaluation weights through the analytic hierarchy process, we collected multi-dimensional data related to the redevelopment of waterfront areas;

[0010] (3) Evaluation method

[0011] Based on the evaluation indicators, a comprehensive potential evaluation model for waterfront areas was constructed through multi-factor superposition analysis. The ArcGIS platform was used to achieve data integration and spatial visualization. A distribution map of the redevelopment potential of waterfront areas was generated to graphically display the development potential of each area.

[0012] (4) Results analysis

[0013] Identification of potential areas: Based on the distribution of the comprehensive potential index, the waterfront area is divided into high potential, medium potential and low potential areas.

[0014] Beneficial effects of the present invention:

[0015] This paper gives priority to the ecological environment and natural resources of the region, quantifies key ecological indicators such as water quality improvement potential, shoreline type and ecological sensitivity, and comprehensively evaluates the regional development potential through multi-factor comprehensive analysis by integrating the three dimensions of ecology, economy and culture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0018] The basic process of the present invention is as follows Figure 1 As shown, the following steps are included:

[0019] (1) Determination of objectives and scope

[0020] Objective: To build an evaluation system for the redevelopment potential of waterfront areas with an ecological orientation as the core, so as to achieve scientific planning and sustainable development of the region; Scope: The research scope covers the waterfront area, including the area extending 500 meters inland from the coastline and 500 meters in the sea; considering the multi-dimensional factors such as the ecological environment, social economy, and cultural characteristics in the region, to build a comprehensive evaluation framework covering ecological restoration, economic development, and cultural improvement;

[0021] (2) Evaluation model

[0022] By constructing a multi-level index system of indicators in three dimensions, namely ecology, economy and culture, and constructing evaluation weights through the analytic hierarchy process, we collected multi-dimensional data related to the redevelopment of waterfront areas;

[0023] (2.1) Selection of evaluation indicators

[0024] Through a large number of literature reviews, expert interviews and survey analyses, a multi-level analytical structural model including ecological, economic and cultural aspects was constructed, and the evaluation index system of the redevelopment potential of the waterfront area of ​​a certain city was hierarchical. The hierarchical structural model was constructed according to the three levels of criterion layer (3 first-level indicators), factor layer (6 second-level indicators) and indicator layer (15 third-level indicators), as shown in Table 1.

[0025] Table 1 Evaluation indicators

[0026]

[0027] (2.2) Determination of indicator weights

[0028] (a) Analytical Hierarchy Process

[0029] The present invention adopts the hierarchical analysis method, combined with expert scoring and consistency test, to complete the calculation process of weight allocation, ensuring that the allocation logic of indicator weights is clear and practical. The present invention uses the 1-9 ratio scale method to express the judgment strength of pairwise comparison. The factors to be compared are set to i and j. If the relative importance of i and j is scaled as a ij , then the relative importance scale of j and i is a ji =1 / a ij .

[0030] According to the evaluation index system, a hierarchical pairwise comparison judgment matrix A is established. n×n , judgment matrix A n×n It is an n×n matrix, where n is the number of evaluation indicators. The judgment matrix is ​​as follows:

[0031]

[0032] Assume that the judgment matrix is ​​A n×n , the weight vector is the judgment matrix A n×n The calculation result W is calculated as follows:

[0033] 1) Normalize the judgment matrix by column (that is, the sum of the column elements is 1):

[0034]

[0035] 2) Sum the normalized matrix row by row:

[0036]

[0037] 3) Normalize the obtained matrix to get the weight vector W i :

[0038]

[0039] 4) Judgment matrix consistency

[0040] The consistency test is an important step to ensure that the weight distribution of elements in the matrix is ​​reasonable and logically consistent. When the order of the judgment matrix is ​​greater than 2, the consistency index CI and the random consistency ratio CR need to be calculated. If CR is less than 0.1, it is considered that the judgment matrix has satisfactory consistency and its weight distribution can be accepted. If the conditions are not met, the matrix elements need to be adjusted until the consistency requirements are met. The specific test steps are as follows:

[0041] ① Calculate the maximum eigenvalue λ max :λ max Is a scalar that describes the relationship between the judgment matrix and the weight vector, through the matrix A n×n The product with the weight vector W is calculated as follows:

[0042]

[0043] ② Calculate the consistency index CI: The consistency index CI is used to measure the internal consistency of the judgment matrix. It is used to evaluate whether the elements of the matrix meet the logical requirements and ensure that the relative importance of each factor is consistent. The calculation is as follows:

[0044]

[0045] ③ Calculate the consistency ratio CR: The consistency ratio CR is used to measure the consistency of the judgment matrix.

[0046] It is the ratio of CI and random consistency index RI.

[0047]

[0048] Among them, RI is the random consistency index (depending on the matrix order, the specific value is shown in the general standard table 2).

[0049] Table 2 General standard table of consistency index RI value

[0050]

[0051] (2.3) Determination of evaluation benchmark value

[0052] The determination of the index benchmark values ​​relies on extensive data collection and analysis, combining historical data, remote sensing images and field survey results, and referring to the standards and successful cases of similar studies at home and abroad. When determining the benchmark values, not only the natural environment, economic development level and social structure differences of the region are taken into consideration, but also the requirements of relevant policies are fully referenced to ensure that the benchmark value of each indicator conforms to the principle of ecological orientation. The final comparison table of the index benchmark values ​​is shown in Table 3.

[0053] Table 3 Comparison table of index benchmark values

[0054]

[0055] (3) Evaluation method

[0056] Based on the evaluation indicators, a comprehensive potential evaluation model for waterfront areas was constructed through multi-factor superposition analysis. The ArcGIS platform was used to achieve data integration and spatial visualization. A distribution map of the redevelopment potential of waterfront areas was generated to graphically display the development potential of each area.

[0057] (4) Results analysis

[0058] Identification of potential areas: Based on the distribution of the comprehensive potential index, the waterfront area is divided into high potential, medium potential and low potential areas. In this example, a certain bay area and the eastern coastal area have the highest redevelopment potential, and the redevelopment potential gradually decreases from the certain bay area to both banks.

Claims

1. A method for evaluating the redevelopment potential of a waterfront area, characterized in that: Here are the steps: (1) Determination of objectives and scope Objective: To build an evaluation system for the redevelopment potential of waterfront areas with an ecological orientation as the core, and to achieve scientific planning and sustainable development of the region; Scope: The research covers the waterfront area, including the area extending 500 meters inland from the coastline and 500 meters in the sea. Considering the multi-dimensional factors such as the ecological environment, social economy, and cultural characteristics in the region, a comprehensive evaluation framework covering ecological restoration, economic development, and cultural improvement is constructed; (2) Evaluation model By constructing a multi-level index system of indicators in three dimensions, namely ecology, economy and culture, and constructing evaluation weights through the analytic hierarchy process, we collected multi-dimensional data related to the redevelopment of waterfront areas; (3) Evaluation method Based on the evaluation indicators, a comprehensive potential evaluation model for waterfront areas was constructed through multi-factor superposition analysis. The ArcGIS platform was used to achieve data integration and spatial visualization. A distribution map of the redevelopment potential of waterfront areas was generated to graphically display the development potential of each area. (4) Results analysis Identification of potential areas: Based on the distribution of the comprehensive potential index, the waterfront area is divided into high potential, medium potential and low potential areas.

2. A method for evaluating the redevelopment potential of a waterfront area according to claim 1, characterized in that: Step (2) is as follows: (2.1) Selection of evaluation indicators Through literature review, expert interviews and research analysis, a multi-level analysis structure model including ecological economy and culture is constructed, and the waterfront redevelopment potential evaluation index system is hierarchical. A hierarchical structure model is constructed according to the three levels of criterion layer, factor layer and indicator layer. (2.2) Determination of indicator weights (a) Analytical Hierarchy Process The analytic hierarchy process is used, combined with expert scoring and consistency testing, to complete the calculation process of weight allocation, ensuring that the allocation logic of indicator weights is clear and practical; the present invention uses a 1-9 scale to express the judgment strength of pairwise comparisons; the factors to be compared are set to i and j; if the relative importance of i and j is scaled as a ij , then the relative importance scale of j and i is a ji =1 / a ij ; According to the evaluation index system, a hierarchical pairwise comparison judgment matrix A is established. n×n , judgment matrix A n×n is an n×n matrix, where n is the number of evaluation indicators; the judgment matrix is ​​as follows: Assume that the judgment matrix is ​​A n×n , the weight vector is the judgment matrix A n×n The calculation result W is calculated as follows: 1) Normalize the judgment matrix by column: 2) Sum the normalized matrix row by row: 3) Normalize the obtained matrix to get the weight vector W i : 4) Judgment matrix consistency When the array order is greater than 2, the consistency index CI and random consistency ratio CR need to be calculated; If CR is less than 0.1, the judgment matrix is ​​considered to have satisfactory consistency and its weight distribution can be accepted; if it does not meet the conditions, the matrix elements need to be adjusted until the consistency requirements are met; the specific inspection steps are as follows: ① Calculate the maximum eigenvalue λ max :λ max Is a scalar that describes the relationship between the judgment matrix and the weight vector, through the matrix A n×n The product with the weight vector W is calculated as follows: ② Calculate the consistency index CI: The consistency index CI is used to measure the internal consistency of the judgment matrix; it is used to evaluate whether the elements of the matrix meet the logical requirements and ensure that the relative importance of each factor is consistent; the calculation is as follows: ③ Calculate the consistency ratio CR: The consistency ratio CR is used to measure the consistency of the judgment matrix; it is the ratio of CI and the random consistency index RI; (2.3) Determination of evaluation benchmark value The determination of the benchmark values ​​of indicators relies on extensive data collection and analysis; when determining the benchmark values, not only the natural environment, economic development level and social structure differences of the region are taken into consideration, but also the requirements of relevant policies are fully drawn upon to ensure that the benchmark value of each indicator complies with the principles of ecological orientation.

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