CN-122022588-A - Underground water aquatic water threshold grading dynamic early warning method integrating multiple source indexes

Abstract

The invention discloses a method for dynamically pre-warning underground water ecological threshold grading by fusing multiple source indexes, which comprises the steps of constructing a pre-warning index system comprising topography, gas-covered zone lithology, precipitation infiltration replenishment intensity, underground water level burial depth and TDS, dividing the value range of the pre-warning index into continuous warning grades and assigning values, constructing a judging matrix, determining relative weights corresponding to the pre-warning indexes, determining GWES, pre-warning grading the GWES, and setting multiple future pre-warning scenes for pre-warning evaluation. The multi-source fusion early warning index system breaks through the limitation of traditional single index evaluation, determines the GWES through standardized assignment and index weight, not only reflects the relative importance of each early warning index in an ecological system, but also remarkably improves the objectivity and ecological relevance of early warning classification, overcomes the subjectivity of artificial division, fully reserves the characteristic of data space heterogeneity, and enables the early warning result to reflect the overall trend and reflect the local difference.

Inventors

• YANG LIBIN
• FAN XINYING
• HOU KAI
• YAN DENGMING
• LIU MINGJUN
• SUN MENGMENG
• XIA FAN
• Peng Yiyin
• LU YISI
• YANG JING

Assignees

• 黄河勘测规划设计研究院有限公司

Dates

Publication Date

20260512

Application Date

20260204

Claims (5)

1. 1. A hierarchical dynamic pre-warning method for a groundwater ecological threshold value based on a multi-source index is characterized by comprising the following steps: S1, acquiring data related to an underground water ecological system, and constructing an early warning index system, wherein the early warning index system comprises topography, gas-covered zone lithology, rainfall infiltration replenishing strength, underground water level burial depth and TDS; S2, dividing the value range of each early warning index in the target area into continuous warning grades and assigning values, wherein the warning grade of each early warning index comprises no warning, mild, moderate and severe, and the grade assignment corresponding to the no warning, the mild, the moderate and the severe is sequentially 1,3, 5 and 7; S3, constructing a judgment matrix of a safety target layer of the groundwater ecological system, carrying out consistency test on the constructed judgment matrix to ensure that CR of the judgment matrix is less than 0.1, adopting a chromatographic analysis method to determine the relative weight corresponding to each early warning index, determining the GWES based on the relative weight and the grading assignment in S2, and adopting a natural interruption method to carry out early warning grading on the GWES, wherein the early warning grades comprise blue light, yellow light and red light early warning; S4, acquiring long-time sequence monitoring data of early warning indexes with dynamic change characteristics, setting a plurality of future early warning scenes, wherein the future early warning scenes at least comprise a climate hydrologic scene, a water level fluctuation scene and a water quality evolution scene, calculating the underground water ecological environment safety index and the corresponding early warning level under each future early warning scene, and updating and distributing the early warning level of the underground water ecological threshold value of the target area.
2. 2. The underground water ecological threshold grading dynamic early warning method based on the multi-source indexes, which is characterized by comprising the steps of quantifying each early warning index when an early warning index system is built in S1, quantitatively representing the landform index by using relative elevation values calculated based on digital elevation model data, representing the gas-covered lithology index by using a permeability coefficient, representing the rainfall infiltration replenishment index by using the rainfall infiltration replenishment intensity, and obtaining the underground water level burial depth representation by using an underground water dynamic monitoring network monitoring, wherein the underground water solubility total solid is obtained by sampling detection.
3. 3. The method for dynamically warning the threshold level of underground water by fusion of multiple source indexes according to claim 1, wherein in S2, when each warning index is classified according to warning level, the topography and topography takes a relative elevation value Z as a classification index, the lithology of a gas-covered zone takes a permeability coefficient K of the gas-covered zone as a classification index, and the rainfall infiltration replenishment takes a rainfall infiltration replenishment strength epsilon as a classification index.
4. 4. The method for dynamically pre-warning the threshold level of the groundwater ecology integrating multiple indexes according to claim 1, wherein in the step S3, the calculation formula of the groundwater ecology environment safety index GWES is as follows: ; Wherein n is the number of early warning indexes, P i is the grading assignment of the ith early warning index, W i is the weight of the ith early warning index, wherein GWES < 3.15 corresponds to blue light early warning, GWES < 3.15 < 4.20 corresponds to yellow light early warning, and GWES >4.20 corresponds to red light early warning.
5. 5. The underground water ecological threshold grading dynamic early warning method integrating multiple source indexes according to claim 1 is characterized in that in the step S4, the climate hydrologic scene is obtained based on rainfall infiltration replenishment simulation with dynamic change characteristics, wherein the climate hydrologic scene comprises a dead water year scene and a plentiful water year scene, the water level fluctuation scene is obtained according to underground water level burial depth simulation, the water level fluctuation scene comprises a shallowest underground water level burial depth scene and a deepest underground water level burial depth scene, and the water quality evolution scene is obtained based on underground water TDS simulation, wherein the water quality evolution scene comprises a TDS concentration minimum scene and a TDS concentration maximum scene.

Description

Underground water aquatic water threshold grading dynamic early warning method integrating multiple source indexes Technical Field The invention relates to the technical field of underground water ecological safety and environmental protection, in particular to a underground water ecological threshold grading dynamic early warning method integrating multiple source indexes. Background The groundwater resource is an 'underground reservoir' of an earth surface ecological system, and is a key resource for regulating the wetland and lake dynamics, affecting the soil salinization, controlling the vegetation community structure and succession. The evolution trend of the ecological processes such as marsh wetland development, soil salinization, land desertification and the like is directly regulated and controlled by the underground water level burial depth and the water quality dynamic change, and when the underground water level burial depth is too deep or too shallow and the concentration of total dissolved solids (namely TDS) of the underground water exceeds a specific threshold value, the ecological system depending on the underground water is subjected to degradation risk, and the ecological problems are particularly represented by wetland atrophy, soil salinity surface accumulation aggravation, vegetation coverage decline and the like. Under the influence of superposition of climate change and human activities, the groundwater supply-runoff-drainage process and the ecological effect thereof are more complex, and the uncertainty and the management and control difficulty of regional groundwater ecological safety are aggravated. Therefore, a scientific and reasonable underground water ecological threshold early warning system is constructed, and the method has important significance for realizing ecological protection and risk prevention and control of underground water resources. At present, the underground water ecological safety assessment and early warning method is generally limited to single element or static index, for example, the underground water level or water quality data is simply relied on to judge, the system integration of multiple elements such as topography, a gas-covered belt structure, precipitation infiltration replenishment and the like is lacking, and the real response mechanism of an ecological system is difficult to comprehensively reveal. In addition, the prior method is divided empirically in index classification and weight determination, and lacks quantitative support based on underground water flow system theory and ecological mechanism, so that the early warning result has obvious defects in space adaptability and mechanism interpretation. In the early warning implementation level, most technologies still stay in current state evaluation, and the dynamic evolution trend of key factors such as precipitation, water level, water quality and the like cannot be fully considered, and the simulation capability and early warning updating mechanism for future scenes are also lacking, so that the establishment of a prospective and differentiated ecological management and control strategy is difficult to support. Therefore, it is highly desirable to construct a groundwater ecological threshold grading dynamic early warning method integrating multiple indexes, and integrating mechanism analysis, dynamic early warning and partition regulation and control all flows so as to improve the refinement level and active prevention and control capability of regional ecological risk management. Disclosure of Invention In view of the above, the invention provides a underground water ecology threshold grading dynamic early warning method integrating multiple source indexes. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention discloses a method for dynamically pre-warning a hierarchical threshold value of groundwater ecological threshold value by fusing multiple indexes, which comprises the following steps: S1, acquiring data related to an underground water ecological system, and constructing an early warning index system, wherein the early warning index system comprises topography, gas-covered zone lithology, rainfall infiltration replenishing strength, underground water level burial depth and TDS; S2, dividing the value range of each early warning index in the target area into continuous warning grades and assigning values, wherein the warning grade of each early warning index comprises no warning, mild, moderate and severe, and the grade assignment corresponding to the no warning, the mild, the moderate and the severe is sequentially 1,3, 5 and 7; S3, constructing a judgment matrix of a safety target layer of the groundwater ecological system, carrying out consistency test on the constructed judgment matrix to ensure that CR of the judgment matrix is less than 0.1, adopting a chromatographic analysis method to determine the relative weight correspond