A method for predicting and analyzing the ecological impacts of water intake projects.

Abstract

This invention proposes a method for predicting and analyzing the ecological impact of water intake projects, belonging to the field of aquatic environmental protection technology. First, real-time monitoring of the surface images of water intake pipelines in the water intake project is conducted. Based on these images, the area of ​​each corrosion point on the pipeline surface is obtained. Then, the corrosion area ratio and corrosion degree are calculated. Finally, based on the corrosion area ratio and corrosion degree, the ecological impact of the water intake project on the surrounding water area is predicted and analyzed. Analyzing the corrosion status of water intake facilities to predict the long-term pollution status of the water area facilitates subsequent ecological remediation. Using the corrosion area ratio and corrosion degree index of the water intake pipeline surface for corrosion analysis is more intuitive than existing methods, simplifies the analysis process and reduces computational load, and improves the efficiency of corrosion analysis and the prediction of the ecological impact of water intake facilities.

Description

Technical Field

[0001] This invention belongs to the field of water environmental protection technology, and in particular relates to a method for predicting and analyzing the ecological impact of water intake project construction. Background Technology

[0002] Due to the long-term intensive occupation of the sea by marine aquaculture and disorderly discharge, some bays have experienced siltation of the beaches in some areas, leading to water quality deterioration in some areas and causing pollution and damage to the marine ecological environment of the surrounding waters. This hinders the transformation and upgrading of my country's marine aquaculture industry from small-scale and decentralized to large-scale, intensive, ecological, factory-like, and intelligent. Therefore, it is necessary to install water intake facilities in severely polluted bays to draw water from areas far from the coastline. This water can be used for hydrological and water quality pollution analysis and to provide seawater resources for marine aquaculture. However, the installation and construction of water intake facilities inevitably have a significant impact on the ecology of the surrounding water bodies. Existing technologies have already analyzed the ecological and environmental impacts of water intake facilities. For example, patent number CN2022113234581 uses quantitative analysis to study the impact of changing water intake methods on pollutant concentrations in downstream rivers. This is achieved by collecting multi-year monthly flow data from upstream and downstream impact analysis sections, the distance between sections, and setting monthly water intake volumes under different conditions. The runoff at the two sections under different water intake methods is determined, and then the concentration of pollutants transported from the intake section to the impact analysis section under different water intake methods is calculated. Finally, the impact of different water intake schemes on pollutant concentrations in downstream rivers is analyzed. Patent number CN2022113234882 discloses an analytical method for evaluating the impact of water intake on pollutant concentrations in downstream rivers, including collecting flow and concentration data from upstream and downstream impact analysis sections before water intake, setting the water intake scale, and calculating... The technology, patent number CN2015108059188, uses a data acquisition system to collect water quality, hydrological, and meteorological data at the water intake location in the source water body. Then, a simulation and forecasting system processes the water quality, hydrological, and meteorological data. A watershed hydrological model is used to simulate and calculate the rainfall runoff pollution load entering the water body. A water quality ecological model is used to simulate and predict the algae distribution in the source water body, obtaining vertical algae distribution data at the water intake location. An automatic control system then analyzes the vertical algae distribution data at the water intake location to determine the water layer with the lowest algae concentration at the water intake location. Finally, the water intake device is controlled to extract water from this water layer. The flow rate data and average flow velocity of the river section after water intake are used to calculate the concentration change rate of pollutants at the downstream impact analysis section caused by water intake. However, existing methods for analyzing the ecological and environmental impacts of water intake facilities, including the aforementioned patent literature, rarely focus on the long-term pollution of the water area caused by corrosion and other reasons caused by the water intake facilities themselves, and ignore the impact of metal ions generated by the corrosion of the facilities on seawater acidification and destruction of seabed habitats. Summary of the Invention

[0003] To address the aforementioned problems in existing technologies, this invention proposes a method for predicting and analyzing the ecological impact of water intake engineering construction. This method can intuitively analyze the corrosion of water intake facilities, filling the gap in existing technologies regarding the analysis of the ecological impact of water intake facilities caused by corrosion.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a method for predicting and analyzing the ecological impact of water intake project construction, specifically including the following steps: Step S1: using a visual monitoring tool to monitor the surface image of the water intake pipeline in the water intake project in real time; Step S2: based on the real-time monitored surface image of the water intake pipeline in the water intake project, obtaining the area of ​​each corrosion point on the surface of the water intake pipeline; Step S3: based on the area of ​​each corrosion point on the surface of the water intake pipeline, calculating the corrosion area ratio and corrosion degree of the water intake pipeline surface; Step S4: calculating the corrosion area ratio and corrosion degree at the first analysis time point and the second analysis time point, and based on the degree of change of the corrosion area ratio at the first analysis time point and the second analysis time point, and the ratio of the corrosion degree at the first analysis time point and the second analysis time point to the standard corrosion degree, performing a predictive analysis of the ecological impact of the water intake project on the water body.

[0005] Further, step S2 specifically includes the following sub-steps: Step S21: Perform grayscale processing on the surface image of the water intake pipeline in the real-time monitored water intake project and apply Gaussian filtering to reduce image noise; Step S22: Use the Canny operator to segment the background of each corrosion point on the surface of the water intake pipeline; Step S23: Use the FindContours function to find the contour of each corrosion point on the surface of the water intake pipeline; Step S24: Based on the contour of each corrosion point on the surface of the water intake pipeline obtained in step S23, calculate the number of pixels within the contour, and calculate the area of ​​each corrosion point on the surface of the water intake pipeline based on the number of pixels.

[0006] Further, in step S3, the calculation of the corrosion area ratio of the water intake pipeline surface is specifically as follows:

[0007] ;

[0008] Wherein, CR represents the corrosion area ratio of the water intake pipeline surface, a and b represent adjustment coefficients, A1 represents the total area of ​​the water intake pipeline surface monitored in real time, and A2 represents the sum of the areas of all corrosion points on the water intake pipeline surface.

[0009] Further, in step S3, the corrosion degree of the water intake pipeline surface is calculated as follows: Step S31: Divide the real-time monitored water intake pipeline surface into N sub-regions; Step S32: Based on the N sub-regions after division in step S31, calculate the corrosion degree of the water intake pipeline surface according to the following formula:

[0010] ;

[0011] Where CD represents the corrosion degree on the surface of the water intake pipeline, N represents the total number of sub-regions, i represents the sub-region number, and NUM represents the total number of corrosion points on the surface of the water intake pipeline. i This represents the number of corrosion points on the surface of the water intake pipeline within the i-th sub-region.

[0012] Further, step S4 specifically comprises: Step S41: Calculating the corrosion area ratio and corrosion degree of the water intake pipeline surface at the first analysis time point, and the corrosion area ratio and corrosion degree of the water intake pipeline surface at the second analysis time point; wherein the first analysis time point is earlier than the second analysis time point; Step S42: Calculating the difference between the corrosion area ratio of the water intake pipeline surface at the second analysis time point and the corrosion area ratio of the water intake pipeline surface at the first analysis time point, and recording it as a first value. When the first value is less than or equal to a first preset value, the predicted degree of ecological impact of the water intake project on the water body is low pollution risk; otherwise, proceeding to step S43: Step S43: Calculating the ratio of the corrosion degree of the water intake pipeline surface at the first analysis time point to the standard corrosion degree of the water intake pipeline surface at the first analysis time point, and recording it as a second value; calculating the ratio of the corrosion degree of the water intake pipeline surface at the second analysis time point to the standard corrosion degree of the water intake pipeline surface at the second analysis time point, and recording it as a third value, wherein the water intake pipeline... The standard corrosion degree of the surface is equal to the value calculated according to step S32 after the total number of corrosion points on the surface of the water intake pipeline is evenly distributed to each sub-region; Step S44: When the second value is less than or equal to the second preset value, it is determined whether the difference between the third value and the second value is less than or equal to the first threshold. When the difference between the third value and the second value is less than or equal to the first threshold, the degree of impact of the water intake project on the ecology of the water area is predicted to be medium to high pollution risk. When the difference between the third value and the second value is greater than the first threshold, the degree of impact of the water intake project on the ecology of the water area is predicted to be high pollution risk. The first threshold is greater than the second threshold.

[0013] Furthermore, the visualization monitoring tool in step S1 is a waterproof camera or a submersible camera.

[0014] The beneficial technical effects of this invention compared with the prior art are as follows:

[0015] (1) A new method for predicting and analyzing the ecological impact of water intake project construction is proposed. By analyzing the corrosion of water intake facilities, the long-term pollution status of the water area caused by the water intake facilities is predicted, which is conducive to the subsequent ecological management.

[0016] (2) The corrosion analysis of water intake facilities is conducted by using the corrosion area ratio and corrosion index of the surface of the water intake pipeline. This is more intuitive than corrosion analysis based on the weight change of the water intake pipeline, simplifies the analysis process and calculation, and improves the efficiency of corrosion analysis of water intake facilities and prediction analysis of the ecological impact of water intake facilities. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a simplified flowchart of the method for predicting and analyzing the ecological impact of water intake project construction according to the present invention.

[0019] Figure 2 This is a simplified flowchart illustrating the process of obtaining the area of ​​each corrosion point on the surface of the water intake pipeline according to the present invention.

[0020] Figure 3 This is a simplified flowchart of the process for predicting and analyzing the ecological impact of water intake projects on the water body based on the corrosion area ratio and corrosion degree, according to the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Combination Figure 1This invention proposes a method for predicting and analyzing the ecological impact of water intake project construction, specifically including the following steps: Step S1: Using a visual monitoring tool, monitor the surface image of the water intake pipeline in the water intake project in real time. The visual monitoring tool is preferably a waterproof camera or a submersible camera; Step S2: Based on the real-time monitored surface image of the water intake pipeline in the water intake project, obtain the area of ​​each corrosion point on the surface of the water intake pipeline. The water intake pipeline is usually made of steel. When steel corrodes, yellow or brown rust will appear on the surface. As the corrosion deepens, the rust layer expands in volume, causing the surrounding concrete to develop longitudinal cracks or peel off. When steel corrodes, small pore-like or pitted corrosion marks may also appear, as well as the surface becoming uneven and bumpy. Therefore, corrosion points can be completely detected visually.

[0024] Combination Figure 2 Step S2 specifically includes the following sub-steps: Step S21: Perform grayscale processing on the surface image of the water intake pipeline in the real-time monitored water intake project and apply Gaussian filtering to reduce image noise. Specifically, this requires balancing the contradiction between filtering effect and detail preservation by setting the convolution kernel size and standard deviation parameters in the Gaussian filtering function; Step S22: Use the Canny operator to segment the background of each corrosion point on the surface of the water intake pipeline. Of course, commonly used edge detection operators such as Sobel and Laplace can also be used; Step S23: Use the FindContours function to find the contour of each corrosion point on the surface of the water intake pipeline; Step S24: Based on the contour of each corrosion point on the surface of the water intake pipeline obtained in Step S23, calculate the number of pixels within the contour, and calculate the area of ​​each corrosion point on the surface of the water intake pipeline based on the number of pixels.

[0025] Step S3: Based on the area of ​​each corrosion point on the surface of the water intake pipeline, calculate the corrosion area ratio and corrosion degree of the water intake pipeline surface; specifically:

[0026] ;

[0027] Where CR represents the corrosion area ratio of the water intake pipeline surface, a and b represent adjustment coefficients, A1 represents the total area of ​​the water intake pipeline surface monitored in real time, and A2 represents the sum of the areas of all corrosion points on the water intake pipeline surface. From the above formula, it can be seen that when the total area is A1, the larger the sum of the areas of all corrosion points on the water intake pipeline surface (A2), the larger the corrosion area ratio CR of the water intake pipeline surface.

[0028] The calculation of corrosion degree on the surface of the water intake pipeline in step S3 is specifically as follows: Step S31: Divide the real-time monitored surface of the water intake pipeline into N sub-regions; Step S32: Based on the N sub-regions after division in step S31, calculate the corrosion degree on the surface of the water intake pipeline according to the following formula:

[0029] ;

[0030] Where CD represents the corrosion degree on the surface of the water intake pipeline, N represents the total number of sub-regions, i represents the sub-region number, and NUM represents the total number of corrosion points on the surface of the water intake pipeline. i This represents the number of corrosion points on the surface of the water intake pipeline within the i-th sub-region.

[0031] Combination Figure 3 Step S4: Calculate the corrosion area ratio and corrosion degree at the first and second analysis time points. Based on the degree of change in the corrosion area ratio at the first and second analysis time points, and the ratio of the corrosion degree at the first and second analysis time points to the standard corrosion degree, conduct a predictive analysis of the ecological impact of the water intake project on the water body. Specifically: Step S41: Calculate the corrosion area ratio and corrosion degree of the water intake pipeline surface at the first and second analysis time points. The first analysis time point is earlier than the second analysis time point. It is understood that the first and second analysis time points should be spaced out by a considerable period of time, at least on a quarterly basis, so as to more objectively observe the long-term corrosion of the water intake pipeline surface by seawater. Step S42: Calculate the difference between the corrosion area ratio of the water intake pipeline surface at the second analysis time point and the corrosion area ratio at the first analysis time point, and record it as the first value. When the first value is less than or equal to the first preset value, the predicted degree of ecological impact of the water intake project on the water body is low pollution risk. It can be understood that when the first value is less than or equal to the first preset value, it indicates that the corrosion degree of the water intake pipeline at the second analysis time point is not significantly different from that at the first analysis time point, and the corrosion has not deepened. In this case, the ecological impact of the water intake pipeline on the water body, especially the long-term ecological impact, can be considered limited. Therefore, the predicted degree of ecological impact of the water intake project on the water body is low pollution risk. When the first value is greater than the first preset value, the corrosion has deepened, and step S43 is executed.

[0032] Step S43: Calculate the ratio of the corrosion degree of the water intake pipeline surface at the first analysis time point to the standard corrosion degree of the water intake pipeline surface at the first analysis time point, and record it as the second value. Calculate the ratio of the corrosion degree of the water intake pipeline surface at the second analysis time point to the standard corrosion degree of the water intake pipeline surface at the second analysis time point, and record it as the third value. The standard corrosion degree of the water intake pipeline surface is equal to the value calculated according to step S32 after the total number of corrosion points on the water intake pipeline surface is evenly distributed to each sub-region.

[0033] For example, if the surface of the water intake pipeline under real-time monitoring is divided into six sub-regions (N=6), and the total number of corrosion points on the surface of the water intake pipeline is 30, then the value NUM is assigned. i=30 / 6=5, and calculate the corresponding CD value as the standard corrosion degree: CD=ln(5 / 30). From the above definition and calculation formula, it can be seen that the ratio of the corrosion degree on the surface of the water intake pipeline to the standard corrosion degree reflects the degree of concentration of corrosion points in a sub-region under the same total number of corrosion points. The larger the ratio, the more uniform the distribution of corrosion points on the surface of the water intake pipeline; the smaller the ratio, the more concentrated the distribution of corrosion points on the surface of the water intake pipeline is in one or a few sub-regions.

[0034] Step S44: When the second value is less than or equal to the second preset value, determine whether the difference between the third value and the second value is less than or equal to the first threshold; when the difference between the third value and the second value is less than or equal to the first threshold, predict that the water intake project's impact on the local water ecosystem is of medium to high pollution risk; when the difference between the third value and the second value is greater than the first threshold, predict that the water intake project's impact on the local water ecosystem is of high pollution risk. In this invention, the first threshold is greater than the second threshold.

[0035] In this invention, the relationship between the second value and the second preset value is first determined to assess the distribution of corrosion points on the surface of the water intake pipeline at the first analysis time point. When the second value is less than or equal to the second preset value, indicating that the distribution of corrosion points on the surface of the water intake pipeline at the first analysis time point is uneven, it suggests that the main cause of corrosion is external force damage, uneven stress on the water intake pipeline, or surface defects in the water intake pipeline itself, and its impact on the ecology of the water area is relatively minor. However, when the second value is greater than the second preset value, indicating that the distribution of corrosion points on the surface of the water intake pipeline at the first analysis time point is relatively uniform, it suggests that the main cause of corrosion is electrochemical corrosion or synergistic corrosion combining microorganisms and electrochemistry. In the long term, electrochemical corrosion or synergistic corrosion combining microorganisms and electrochemistry will cause large-area, multi-point corrosion of the water intake pipeline, thereby releasing heavy metal ions and other corrosion products, which will have a more serious impact on the ecology of the water area. Based on the differentiation of corrosion degree at the first analysis time point, the corrosion degree at the second analysis time point is compared with that at the first analysis time point. By setting a first threshold and a second threshold, the ecological impact of corrosion on the water area can be determined based on the difference in corrosion degree at the first analysis time point.

[0036] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0037] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A method for predicting and analyzing the ecological impact of water intake project construction, characterized in that, Specifically, the following steps are included: Step S1: Use visual monitoring tools to monitor the surface images of water intake pipelines in the water intake project in real time; Step S2: Based on the real-time monitored surface images of the water intake pipeline in the water intake project, obtain the area of ​​each corrosion point on the surface of the water intake pipeline; Step S3: Based on the area of ​​each corrosion point on the surface of the water intake pipeline, calculate the corrosion area ratio and corrosion degree of the water intake pipeline surface; Step S4: Calculate the corrosion area ratio and corrosion degree at the first analysis time point and the second analysis time point. Based on the degree of change of the corrosion area ratio at the first analysis time point and the second analysis time point, and the ratio of the corrosion degree at the first analysis time point and the second analysis time point to the standard corrosion degree, conduct a predictive analysis of the ecological impact of the water intake project on the water area. Step S2 specifically includes the following sub-steps: Step S21: Perform grayscale processing on the surface image of the water intake pipeline in the real-time monitored water intake project and apply Gaussian filtering to reduce image noise; Step S22: Use the Canny operator to segment the background of each corrosion point on the surface of the water intake pipeline; Step S23: Use the FindContours function to find the contours of each corrosion point on the surface of the water intake pipeline; Step S24: Based on the contours of each corrosion point on the surface of the water intake pipeline obtained in step S23, calculate the number of pixels within the contours, and calculate the area of ​​each corrosion point on the surface of the water intake pipeline based on the number of pixels. The calculation of corrosion degree on the surface of the water intake pipeline in step S3 is as follows: Step S31: Divide the surface of the water intake pipeline under real-time monitoring into N sub-regions; Step S32: Based on the N sub-regions after equal division in step S31, calculate the corrosion degree of the water intake pipeline surface according to the following formula: ； Where CD represents the corrosion degree on the surface of the water intake pipeline, N represents the total number of sub-regions, i represents the sub-region number, and NUM represents the total number of corrosion points on the surface of the water intake pipeline. i This represents the number of corrosion points on the surface of the water intake pipeline within the i-th sub-region; Step S4 specifically involves: Step S41: Calculate the corrosion area ratio and corrosion degree of the water intake pipeline surface at the first analysis time point, and the corrosion area ratio and corrosion degree of the water intake pipeline surface at the second analysis time point; wherein the first analysis time point is earlier than the second analysis time point; Step S42: Calculate the difference between the corrosion area ratio of the water intake pipeline surface at the second analysis time point and the corrosion area ratio of the water intake pipeline surface at the first analysis time point, and record it as the first value. When the first value is less than or equal to the first preset value, the predicted degree of ecological impact of the water intake project on the water body is low pollution risk; otherwise, proceed to step S43: Step S43: Calculate the ratio of the corrosion degree of the water intake pipeline surface at the first analysis time point to the standard corrosion degree of the water intake pipeline surface at the first analysis time point, and record it as the second value. Calculate the ratio of the corrosion degree of the water intake pipeline surface at the second analysis time point to the standard corrosion degree of the water intake pipeline surface at the second analysis time point, and record it as the third value. The standard corrosion degree of the water intake pipeline surface is equal to the value calculated according to step S32 after the total number of corrosion points on the water intake pipeline surface is evenly distributed to each sub-region. Step S44: When the second value is less than or equal to the second preset value, determine whether the difference between the third value and the second value is less than or equal to the first threshold. When the difference between the third value and the second value is less than or equal to the first threshold, predict that the water intake project has a medium to high pollution risk on the local water ecology. When the difference between the third value and the second value is greater than the first threshold, predict that the water intake project has a high pollution risk on the local water ecology. When the second value is greater than the second preset value, it is determined whether the difference between the third value and the second value is less than or equal to the second threshold. When the difference between the third value and the second value is less than or equal to the second threshold, the degree of impact of the water intake project on the ecology of the water body is predicted to be medium to high pollution risk. When the difference between the third value and the second value is greater than the second threshold, the degree of impact of the water intake project on the ecology of the water body is predicted to be high pollution risk.

2. The method for predicting and analyzing the ecological impact of water intake project construction according to claim 1, characterized in that, The calculation of the corrosion area ratio of the water intake pipeline surface in step S3 is as follows: ； Where CR represents the corrosion area ratio of the water intake pipeline surface, a and b represent adjustment coefficients, A1 represents the total area of ​​the water intake pipeline surface monitored in real time, and A2 represents the sum of the areas of all corrosion points on the water intake pipeline surface.

3. The method for predicting and analyzing the ecological impact of water intake project construction according to claim 1, characterized in that, The first threshold is greater than the second threshold.

4. The method for predicting and analyzing the ecological impact of water intake project construction according to claim 1, characterized in that, The visualization monitoring tool in step S1 is a waterproof camera or a submersible camera.

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