CN110457831B - Method for evaluating anaplerosis suitability of underground water source - Google Patents
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Abstract
The technical scheme of the invention provides a method for evaluating the anaplerosis suitability of an underground water source area, which comprises the following steps: evaluating the recharging potential of the target underground water source area to obtain a potential index; evaluating the refilling risk of the target underground water source area to obtain a risk index; evaluating the benefit of the target underground water source area for recharging to obtain a benefit index; and weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a back-supplementing suitability evaluation result, and acquiring a corresponding evaluation grade. The method has the advantages of realizing quantitative evaluation on the anaplerosis suitability of the underground water source area, having clear indexes, simple calculation and the like, and being capable of realizing accurate screening of the target area of the underground water source area suitable for anaplerosis.
Description
Technical Field
The invention relates to the field of groundwater recharge, in particular to a recharge suitability evaluation method for an underground water source area.
Background
Underground water resources are important water supply sources in northern areas and many cities of China. However, with the increase of population, the expansion of urban scale and the development of industry and agriculture, serious problems of water quantity and water quality occur in underground water source areas in many areas in China, so that the contradiction between the development and the utilization of underground water is prominent.
The groundwater recharge is an effective measure for solving the urban water supply safety, recovering the exploitation capacity of a water source area and improving the groundwater environment, and aims to convert ground surface water sources which are not uniformly distributed in time and space, lack of storage space and unstable in water supply, including rivers, reservoir abandoned water, rain and flood, treated regenerated water and the like into more stable and sustainable groundwater resources by using groundwater recharge engineering. In the last 30 years, developed countries attach great importance to groundwater recharge technology, develop rapidly, and obtain good economic and environmental benefits. Therefore, based on the current situation that the groundwater source area water resources are seriously lost and the groundwater environmental risk is increasingly aggravated in China, the research on the recharge suitability of the groundwater source area is urgently needed to be carried out, so that the groundwater quantity and water quality safety are ensured.
A plurality of underground water source areas in China not only have large recharging requirements, but also have good recharging conditions. On the one hand, a large number of underground water source areas in China are subjected to long-term over-mining to form a huge underground storage space, and a basic condition is provided for groundwater recharge. On the other hand, as the quantity of reclaimed water resources in China is continuously increased, simultaneously, rainwater flood storage engineering is also applied, and particularly, the implementation of the project of transferring water from south to north causes the water supply pattern in the northern area of China to be completely changed, and provides a chance for the restoration and conservation of underground water resources.
However, at present, only a small amount of research is carried out in China on the groundwater recharge suitability analysis, the groundwater recharge feasibility of partial regions is analyzed in the aspect of whether the underground aquifer has a water storage space, but the evaluation index is relatively single, and the consideration on the evaluation index in the aspects of ecological environment risk and benefit after recharge is lacked. In addition, the existing evaluation methods have poor contrast, and lack systematic and scientific quantitative evaluation on evaluation indexes. In conclusion, the lack of a quantitative evaluation method for the suitability of groundwater source recharging in China currently becomes a technical bottleneck restricting the safe recharging of groundwater. The method has the advantages that key indexes influencing the groundwater source land recharge are scientifically and accurately analyzed, a quantitative evaluation system of the multidimensional groundwater source land recharge suitability taking groundwater source land recharge potential, recharge risk and recharge benefit as the core is established, scientific basis is provided for screening groundwater source lands suitable for recharge, targets and decisions are provided for recharge of the groundwater source lands, and technical support is provided for groundwater safety strategy decisions.
In conclusion, before the underground water source recharging work is carried out, the problem that how to scientifically and reasonably evaluate the suitability of the underground water source recharging is the primary consideration and the solution is needed. Further, how to construct an underground water anaplerosis suitable evaluation system becomes a problem to be solved urgently.
Disclosure of Invention
The invention provides an evaluation method for the anaplerosis suitability of an underground water source area, which is used for solving the problem of how to construct an underground water source area anaplerosis suitability evaluation system and filling the blank in the prior art.
In order to achieve the purpose, the technical scheme of the invention provides a method for evaluating the anaplerosis suitability of an underground water source area, which comprises the following steps: judging whether the underground water source is a target underground water source; evaluating the recharging potential of the target underground water source area to obtain a potential index; evaluating the refilling risk of the target underground water source area to obtain a risk index; evaluating the benefit of the target groundwater source area for the benefit compensation to obtain a benefit index; and weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a back-supplementing suitability evaluation result.
As a preferable aspect of the above technical means, the determining whether or not the groundwater source region is the target groundwater source region includes: and judging whether the underground water source land belongs to a forward flood flushing fan underground water system or not, mining shallow pore water from the water source land, and if so, determining that the underground water source land is the target underground water source land.
As the optimization of the technical scheme, the anaplerosis potential is evaluated to obtain a potential index, which comprises the following steps: and partitioning the target underground water source area to obtain a regulation and storage cell group. And screening a plurality of effective regulating and storing cells from the regulating and storing cell group. And calculating a plurality of effective regulating and storing cells according to the constructed compensation potential evaluation model, and obtaining the potential index according to the calculation result.
As the optimization of the technical scheme, the model for evaluating the anaplerosis potential is as follows:
wherein Q p : recharge potential index of the underground water source; f i : the adjustable storage area of the effective storage cell is adjusted; u. of i : effectively regulating the water supply value of the storage cell; h is imin : the maximum rising threshold of the groundwater level of the effective storage cell is adjusted; h is i1 : the elevation of the engineering limit water level of the storage cell is effectively regulated; h is a total of i2 : effectively regulating the environmental restriction water level elevation of the storage cell; h is a total of i3 : the minimum loss of the water quantity of the replenishing water of the effective regulating and storing district limits the water level elevation; h is it : effectively regulate the current water level elevation of the aquifer in the district.
Preferably, the method for evaluating the risk of anaplerosis comprises the following steps: calculating a groundwater sensitivity index of a target groundwater source area; calculating an underground water vulnerability index of a target underground water source area; calculating the pollution source intensity and the hazard index of the target underground water source area; and comprehensively calculating the sensitivity index of the underground water, the fragility index of the underground water, the strong pollution source and the harmfulness index to obtain a risk index.
As a preferable aspect of the above technical solution, the groundwater sensitivity index:
wherein i is less than or equal to 5; s e : sensitivity index of ground Water Source, S 1 : a groundwater source type; s 2 : the scale of water supply from a groundwater source; s 3 : underground water source underground water burying conditions; s 4 : a groundwater source replenishment type; s. the 5 : distance between underground water source and pollution source; ω (i): corresponding to the weight of index i.
As a preferable aspect of the above technical means, the groundwater vulnerability index:
DI＝r(D)×ω(D)+r(R)×ω(R)+r(A)×ω(A)+r(S)×ω(S)+r(T)×ω(T)+r(I)×ω(I)+r(C)×ω(C)
wherein, DI: an index of groundwater vulnerability; r (D): underground water burial depth index scoring value; ω (D): the weight of the underground water burial depth index; r (R): net feed amount index score value; ω (R): the weight of the net supply indicator; r (A): an aquifer medium index score value; ω (A): a weight of an aquifer medium indicator; r (S): a soil medium index score value; ω (S): weighting of soil medium indexes; r (T): grade value of the terrain slope index; ω (T): a weight of a terrain slope indicator; r (I): an aeration zone medium index score value; ω (I): the weight of the medium index of the aeration zone; r (C): the aquifer hydraulic conductivity index score value; ω (C): the weight of the aquifer hydraulic conductivity index.
As the optimization of the technical scheme, the pollution source is strong and the hazard index is as follows:
wherein R is h : strong pollution source and harmfulness index; r hs : a single pollution source hazard index; i is less than or equal to 7; r (Bi): the pollution source is strong and the hazard evaluation index score value is obtained; b is 1 : optimizing and controlling a comprehensive evaluation index of the pollutants; b 2 : the release source is strong; b 3 : a release position; b 4 : a contaminated pathway; b 5 The area ratio is affected; b 6 : protective measures are taken; b 7 : a time of existence; r hs(n) An nth pollution source hazard index; ω (n): the weight of the nth pollution source hazard evaluation index; m: number of sources of contamination.
Preferably, the benefit of the resupply is evaluated to obtain a benefit index, and the benefit index comprises an economic and ecological benefit index of the target underground water source area:
wherein Eb: supplementing an economic benefit index; r (E) i ) The value of the benefit factor i is compensated; omega (E) i ) Is the weighted value of the benefit factor i.
Preferably, the comprehensive index model is as follows:
QSDRE＝r(Q p )×ω(Q p )+r(S e )×ω(S e )+r(DI)×ω(DI)+r(R h )×ω(R h )+r(E b )×ω(E b )
wherein, QSDRE: replenishing the evaluation value of the suitability of the underground water source; r (Q) p ): a groundwater source recharge potential index score value; omega (Q) p ): weighting the groundwater source recharge potential index; r (S) e ): a groundwater source susceptibility index score value; omega (S) e ) A weight of the ground water source sensitivity index; r (DI): a groundwater vulnerability index score value; ω (DI): an index of groundwater vulnerability; r (R) h ): strong pollution source and hazard index score value; omega (R) h ): the pollution source intensity and the weight of the hazard index; r (E) b ): rewarding the economic benefit index score value; omega (E) b ): and (5) complementing the weight of the economic benefit index.
The technical scheme of the invention provides a method for evaluating the anaplerosis suitability of an underground water source area, which comprises the following steps: evaluating the recharging potential of the target underground water source area to obtain a potential index; evaluating the refilling risk of the target underground water source area to obtain a risk index; evaluating the benefit of the target groundwater source area for the benefit compensation to obtain a benefit index; and weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a back-supplementing suitability evaluation result.
The method has the advantages of realizing quantitative evaluation on the anaplerosis suitability of the underground water source area, having clear indexes, simple calculation and the like, and being capable of accurately screening the target area of the underground water source area suitable for anaplerosis.
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In order 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 described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart provided in an embodiment of the present invention.
Fig. 2 is a schematic flow chart of step 101 in fig. 1.
Fig. 3 is a schematic flow chart of step 102 in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a schematic flow chart provided in an embodiment of the present invention, and as shown in fig. 1, the embodiment provides a method for evaluating suitability of a groundwater source, including:
and step 100, judging whether the underground water source is a target underground water source, if so, executing steps 101-103, and otherwise, ending.
The judging method is to judge whether the underground water source region belongs to a forward flood discharge fan underground water system or not, and can be determined according to hydrogeological maps or underground water system partition maps of nations and various provinces. And further, whether the underground water source ground mainly mines shallow pore water or not is determined as the target underground water source ground if both the shallow pore water and the underground water source ground meet the requirements.
And 101, evaluating the recharging potential of the target underground water source area to obtain a potential index.
Partitioning the target underground water source area to obtain a regulation and storage cell group;
screening a plurality of effective regulating and storing cells from the regulating and storing cell group;
calculating the effective regulating and storing cells according to the constructed compensation potential evaluation model, and obtaining a potential index according to a calculation result, wherein the compensation potential evaluation model is as follows:
wherein Q is p : groundwater source recharge potential index; f i : the adjustable storage area of the effective storage cell is adjusted; u. of i : effectively regulating the water supply value of the storage cell; h is imin : the maximum rising threshold of the groundwater level of the effective storage cell; h is a total of i1 : effectively regulating the project limit water level elevation of the storage cell; h is i2 : the elevation of the environmental restriction water level of the storage cell is effectively regulated; h is i3 : limiting the water level elevation by the minimum loss of the backwater water quantity of the effective regulating and storing area; h is it : and the current water level elevation of the aquifer of the effective storage district.
And 102, evaluating the compensation risk of the target underground water source area to obtain a risk index.
And calculating the underground water sensitivity index, the underground water vulnerability index, the pollution source intensity and the hazard index of the target underground water source area. And comprehensively calculating the sensitivity index of the underground water, the fragility index of the underground water and the pollution source intensity and hazard index to obtain a risk index.
And 103, evaluating the benefit of the target underground water source area for the benefit compensation to obtain a benefit index.
The method comprises the following steps of calculating the economic and ecological benefit indexes of a target underground water source area:
wherein Eb: the economic benefit index is compensated; r (E) i ) The value of the benefit factor i is compensated; omega (E) i ) Is the weight value of the benefit factor i.
And step 104, weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a anaplerotic suitability evaluation result.
QSDRE＝r(Q p )×ω(Q p )+r(S e )×ω(S e )+r(DI)×ω(DI)+r(R h )×ω(R h )+r(E b )×ω(E b )
Wherein, QSDRE: replenishing the evaluation value of the suitability of the underground water source; r (Q) p ): a groundwater source recharge potential index score value; omega (Q) p ): weighting the groundwater source recharge potential index; r (S) e ): a groundwater source susceptibility index score value; omega (S) e ) A weight of the ground water source sensitivity index; r (DI): a groundwater vulnerability index score value; ω (DI): an index of groundwater vulnerability; r (R) h ): strong pollution source and hazard index score value; omega (R) h ): the pollution source intensity and the weight of the hazard index; r (E) b ): compensating the value of the economic benefit index credit; omega (E) b ): and (5) complementing the weight of the economic benefit index.
The technical scheme of the invention provides a method for evaluating the recharge suitability of an underground water source area, which comprises the following steps: evaluating the recharging potential of the target underground water source area to obtain a potential index; evaluating the recharging risk of the target underground water source area to obtain a risk index; evaluating the benefit of the target underground water source area for recharging to obtain a benefit index; and weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a resupply suitability evaluation result.
The method has the advantages of realizing quantitative evaluation on the recharge suitability of the underground water source area, having clear indexes, simple calculation and the like, and being capable of accurately screening the target area of the underground water source area suitable for recharging.
The technical solution of the present invention will be further described with reference to a specific embodiment, and for the step 101, specifically, as shown in fig. 2:
and step 201, partitioning a target underground water source area to obtain a regulation and storage cell group.
And dividing the water-containing layer area with consistency in lithology and thickness into a regulation and storage cell until the target underground water source is partitioned to obtain a regulation and storage cell group.
Specifically, when the target underground water source is used for pumping water in a cluster well, the underground water level falling range formed by superposition of falling of the water level of each well is calculated, and the falling range is calculated according to the upper limit value. The radius of the area covered by the groundwater level descending range is an influence radius threshold.
And 203, judging whether the environmental geological condition information of each regulation and storage cell meets the requirement of the preset basic environmental geological condition information, if so, executing the step 204, and otherwise, continuously collecting the environmental geological condition information of the regulation and storage cell.
And step 204, solving intersection to obtain a plurality of effective regulation and storage cells.
And (3) solving the intersection of the regulated cells meeting the conditions in the step 202 and the step 203 respectively.
And 205, calculating a plurality of effective regulation and storage cells according to the constructed compensation potential evaluation model to obtain a potential index. Wherein, the model for evaluating the anaplerosis potential comprises the following steps:
wherein Q p : recharge potential index of underground water source, m 3 ；F i : adjustable storage area, m, of an effective storage cell 2 ；u i : the water supply value of the storage cell is effectively regulated, and the dimension is not needed; h is imin : the maximum rising threshold value m of the groundwater level of the effective regulation and storage area; h is i1 : the elevation m of the engineering limit water level of the storage cell is effectively regulated; h is i2 : effectively regulating the environment of the storage cell to limit the water level elevation m; h is i3 : limiting the water level elevation m by the minimum loss of the backwater water quantity of the effective regulating and storing area; h is it : and (4) effectively regulating the current water level elevation m of the aquifer of the storage cell.
And step 206, quantifying the anaplerosis potential indexes and determining the anaplerosis potential grade.
After the anaplerosis potential indexes are quantified, the anaplerosis potential indexes calculated by all water source areas are sorted from large to small by using an accumulation frequency method, and then the anaplerosis potential evaluation value of the target underground water source area is determined according to the proportion distribution of 15%,20%,30%,20% and 15% of the number of samples of the underground water source area.
| Q p | Evaluation value |
| The first 15% | 8-10 |
| The first 15 to 35 percent | 6-8 |
| The front 35 percent to 65 percent | 4-6 |
| The first 65 to 85 percent | 2-4 |
| The last 15% | 1 |
The technical solution of the present invention will be further described with reference to specific embodiments, and for the step 102, specifically, as shown in fig. 3:
and 301, calculating the underground water sensitivity index of the target underground water source area.
Specific groundwater sensitivity index:
wherein i is less than or equal to 5; s e : sensitivity index of ground Water Source, S 1 : a groundwater source type; s 2 : the scale of water supply from a groundwater source; s 3 : underground water source underground water burying conditions; s 4 : a groundwater source replenishment type; s 5 : distance between underground water source and pollution source; ω: and (4) weighting. Wherein r (Si) is S 1 To S 5 ω (i) is the above-mentioned S 1 To S 5 The weight of (c).
The sensitivity index (Se) of the groundwater source is evaluated according to the technical guidelines of strong evaluation and classification of pollution sources in a centralized groundwater drinking water source supply area of group standards, and the higher the Se value is, the higher the sensitivity of the water source is. The determination of the evaluation index weight and the score is mainly based on the standard, and corresponding adjustment is carried out when water source places in different areas are calculated specifically. And multiplying the recommended score value of each evaluation index by the recommended weight value corresponding to the evaluation index to obtain the evaluation value of the evaluation index. The evaluation weight assignment of the sensitivity of the underground water source is detailed in table 1.
TABLE 1 weight table of sensitivity evaluation indexes of underground water source
And 302, calculating the underground water vulnerability index of the target underground water source area.
Specifically, the groundwater vulnerability index:
DI＝r(D)×ω(D)+r(R)×ω(R)+r(A)×ω(A)+r(S)×ω(S)+r(T)×ω(T)+r(I)×ω(I)+r(C)×ω(C)
wherein, DI: an index of groundwater vulnerability; d: burying underground water; r: net supply amount; a: an aqueous layer medium; c: aquifer hydraulic conductivity coefficient; s: a soil medium; i: an air-entrained medium; t: a grade of the terrain; ω: and (4) weighting. Wherein r (D) is: recommendation scoring of groundwater burial depth; r (R) is: a recommendation score for net replenishment volume; r (A) is: a recommendation score for the aqueous medium; r (S) is: recommending and scoring the soil medium; r (I) is: a recommendation score for an air-entrained media; r (C) is: and (4) recommending and grading the terrain gradient. ω (D), ω (R), ω (a), ω (S), ω (T), ω (I), and ω (C) are weights corresponding to the evaluation indexes.
And multiplying the recommended score value of each evaluation index by the recommended weight value corresponding to the evaluation index to obtain the evaluation value of the evaluation index. The vulnerability evaluation weight assignment of the underground water source is detailed in the following table.
TABLE 2 weight table of vulnerability evaluation indexes of groundwater source
And step 303, calculating the pollution source intensity and the hazard index of the target underground water source area.
Strong pollution source and hazard index:
wherein R is h : strong pollution source and hazard index; r is hs : a single pollution source hazard index; i is less than or equal to 7; b 1 : optimizing and controlling comprehensive evaluation indexes of pollutants; b is 2 : the pollution release source is strong; b 3 : a contamination release location; b is 4 : a contaminated pathway; b is 5 Pollution affects area ratio; b is 6 : a pollution prevention measure; b is 7 : the time of existence of contamination; r is hs(n) An nth pollution source hazard index; ω (n): (ii) a weight of the nth pollution source hazard evaluation index (table 4); m: the number of pollution sources. r (Bi) is B 1 To B 7 ω (i) is the above-mentioned value B 1 To B 7 The weight of (c).
And multiplying the recommended score value of each evaluation index by the recommended weight value corresponding to the evaluation index to obtain the evaluation value of the evaluation index. The harmfulness index and weight assignment of the pollution source of the underground water source are detailed in table 3, and the type and weight table of the pollution source of the underground water source are detailed in table 4. Wherein a in table 3 is in units of years.
TABLE 3 pollution source hazard index score and weight table
TABLE 4 pollution Source types and weights Table
And step 304, comprehensively calculating the underground water sensitivity index, the underground water vulnerability index and the pollution source intensity and hazard index to obtain a risk index (SDR).
In particular, the method comprises the following steps of,
SDR＝r(S e )×ω(S e )+r(DI)×ω(DI)+r(R h )×ω(R h )
wherein r (S) e ): a groundwater source susceptibility index score value; omega (S) e ) A weight of a ground susceptibility index of the groundwater source; r (DI): a groundwater vulnerability index score value; ω (DI): an index of vulnerability of groundwater; r (R) h ): strong pollution source and hazard index score value; omega (R) h ): the strong source of pollution and the weight of the hazard index.
And 305, judging whether the risk index SDR is higher than a risk index threshold and an individual groundwater sensitivity index, an groundwater vulnerability index, a pollution source strength and a hazard index are higher than the risk threshold, if so, judging that the target groundwater source is not suitable for recharging, otherwise, executing the step 104. Specifically, the risk index threshold is determined from a comparison table of evaluation scores.
Step 103 is now further explained:
and on the basis of analyzing the social benefit and the economic benefit of groundwater recharge, carrying out recharge benefit evaluation of the groundwater source. The benefit evaluation formula of underground water source land recharging is as follows,
wherein Eb: supplementing an economic benefit index; r (E) i ) The value of the benefit factor i is compensated; omega (E) i ) Is the weight value of the benefit factor i. Specifically, the higher the social benefit of the backfilling project and the lower the economic cost, the higher the score value. Wherein, i is used for multiplying the recommendation score value of each evaluation index by the recommendation weight value corresponding to the evaluation index to obtain the evaluation value of the evaluation index. The values of the benefit factor scores and the weight assignment values of the underground water source land resupply are detailed in the following table.
TABLE 5 weight table of benefit evaluation indexes
Step 104 is now further described: weighting the calculation results obtained in the steps 301-304 and 205 to obtain QSDRE values,
QSDRE＝r(Q p )×ω(Q p )+r(S e )×ω(S e )+r(DI)×ω(DI)+r(R h )×ω(R h )+r(E b )×ω(E b )
QSDRE: compensating the suitability evaluation value; q p : groundwater source recharge potential index, S e : ground water source sensitivity index, DI: vulnerability index of groundwater, R h : strong source of pollution and hazard index, E b : supplementing an economic benefit index; omega (Q) p ) The recommended weight value is 0.3; omega (S) e ) The recommended weight value is 0.15; a recommended weight value of ω (DI) of 0.15; omega (R) h ) The recommended weight value is 0.2; omega (E) b ) The recommended weight value is 0.2.
Sequencing and grading various underground water source areas according to the magnitude of the comprehensive index value QSDRE, sequencing the comprehensive index values of the anaplerosis suitability calculated by the various water source areas from large to small by using an accumulation frequency method, distributing the samples to priority, good, medium, poor and inappropriate levels according to the proportion of 15%,20%,30%,20% and 15% of the number of the samples of the underground water source areas, and determining an underground water source area target area capable of being preferentially anaplerosis (table 6).
TABLE 6 evaluation and grading of suitability for underground water source land recharge
The technical scheme of the invention provides a method for evaluating the recharge suitability of an underground water source area, which comprises the following steps: evaluating the recharging potential of the target underground water source area to obtain a potential index; evaluating the recharging risk of the target underground water source area to obtain a risk index; evaluating the benefit of the target groundwater source area for the benefit compensation to obtain a benefit index; and weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a back-supplementing suitability evaluation result.
The method has the advantages of realizing quantitative evaluation on the anaplerosis suitability of the underground water source area, having clear indexes, simple calculation and the like, and being capable of accurately screening the target area of the underground water source area suitable for anaplerosis.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A method for evaluating the suitability of an underground water source for recharging is characterized by comprising the following steps:
judging whether the underground water source is a target underground water source;
evaluating the recharging potential of a target underground water source area to obtain a potential index, and particularly partitioning the target underground water source area to obtain a regulation and storage cell group; screening a plurality of effective regulation and storage cells from the regulation and storage cell group; calculating the effective regulation and storage cells according to the constructed compensation potential evaluation model, and obtaining the potential index according to the calculation result, wherein the compensation potential evaluation model is as follows:
wherein Q is p : groundwater source recharge potential index; f i : the adjustable storage area of the effective storage cell is adjusted; u. u i : effectively regulating the water supply value of the storage cell; h is imin : the maximum rising threshold of the groundwater level of the effective storage cell is adjusted; h is i1 : the elevation of the engineering limit water level of the storage cell is effectively regulated; h is i2 : the elevation of the environmental restriction water level of the storage cell is effectively regulated; h is i3 : limiting the water level elevation by the minimum loss of the backwater water quantity of the effective regulation and storage district; h is it : effectively regulating the current water level elevation of the aquifer of the storage cell;
evaluating the recharge risk of a target underground water source area to obtain a risk index, and calculating the underground water sensitivity index of the target underground water source area; calculating a groundwater vulnerability index of the target groundwater source area; calculating the pollution source intensity and the hazard index of the target underground water source area; comprehensively calculating the underground water sensitivity index, the underground water vulnerability index and the pollution source intensity and hazard index to obtain the risk index; wherein, the groundwater sensitivity index is:
wherein i is less than or equal to 5; s e : sensitivity index of groundwater source, r (Si): evaluating the index score of the sensitivity evaluation of the underground water source; s. the 1 : a groundwater source location type; s 2 : the scale of water supply of the underground water source; s 3 : underground water burying conditions of an underground water source; s 4 : a type of supply of the groundwater source; s 5 : the distance between the underground water source and the pollution source; ω (i): corresponding index S i Right of (1)Weighing;
wherein the groundwater vulnerability index is:
DI＝r(D)×ω(D)+r(R)×ω(R)+r(A)×ω(A)+r(S)×ω(S)+r(T)×ω(T)+r(I)×ω(I)+r(C)×ω(C)
wherein, DI: an index of groundwater vulnerability; r (D): underground water burial depth index scoring value; ω (D): the weight of the underground water burial depth index; r (R): net feed amount index score value; ω (R): the weight of the net supply indicator; r (A): an aquifer medium index score value; ω (A): a weight of an aquifer medium indicator; r (S): a soil medium index score value; ω (S): weighting of soil medium indexes; r (T): grade value of the terrain slope index; ω (T): a weight of a terrain slope indicator; r (I): the value of the medium index of the aeration zone; ω (I): the weight of the medium index of the aeration zone; r (C): the hydraulic conductivity index score value of the aquifer; ω (C): a weight of an aquifer hydraulic conductivity index;
wherein the pollution source intensity and hazard index are as follows:
wherein R is h : strong pollution source and hazard index; r is hs : a single pollution source hazard index; i is less than or equal to 7; r (Bi): the pollution source is strong and the hazard evaluation index score value is obtained; b 1 : optimizing the comprehensive evaluation index of pollutants; b is 2 : the pollution release source is strong; b is 3 : a contamination release location; b 4 : a contaminated pathway; b 5 Pollution affects area ratio; b is 6 : a pollution prevention measure; b is 7 : the time of existence of contamination; r is hs(n) The hazard index of the nth pollution source; ω (n): the weight of the nth pollution source hazard evaluation index; m: the number of pollution sources;
wherein the pollution source intensity and hazard index are as follows:
wherein R is h : strong pollution source and hazard index; r hs : a single pollution source hazard index; i is less than or equal to 7; r (Bi): the pollution source is strong and the hazard evaluation index score value is obtained; b 1 : optimizing the comprehensive evaluation index of pollutants; b 2 : the pollution release source is strong; b is 3 : a contamination release location; b is 4 : a contaminated pathway; b 5 Pollution area ratio; b 6 : a pollution prevention measure; b is 7 : the time of existence of contamination; r is hs(n) An nth pollution source hazard index; ω (n): the weight of the nth pollution source harmfulness evaluation index; m: the number of pollution sources;
wherein the pollution source intensity and hazard index are as follows:
wherein R is h : strong pollution source and harmfulness index; r is hs : a single pollution source hazard index; i is less than or equal to 7; r (Bi): the pollution source is strong and the index score value is evaluated; b is 1 : optimizing the comprehensive evaluation index of pollutants; b is 2 : the pollution release source is strong; b is 3 : a contamination release location; b is 4 : a contaminated pathway; b is 5 Pollution area ratio; b is 6 : a pollution prevention measure; b is 7 : the time of existence of contamination; r is hs(n) An nth pollution source hazard index; ω (n): the weight of the nth pollution source hazard evaluation index; m: the number of pollution sources;
evaluating the benefit of the target underground water source area for the benefit compensation to obtain a benefit index, wherein the benefit index comprises the following steps of:
weighting the potential index, the risk index and the benefit index according to the constructed comprehensive index model to generate a recharge suitability evaluation result of the underground water source area, and analyzing the grade of the recharge suitability evaluation result;
wherein the synthetic index model is:
QSDRE＝r(Q p )×ω(Q p )+r(S e )×ω(S e )+r(DI)×ω(DI)+r(R h )×ω(R h )+r(E b )×ω(E b )
wherein, QSDRE: replenishing the evaluation value of the suitability of the underground water source; r (Q) p ): the value of the underground water source land recharge potential index score; omega (Q) p ): weighting the underground water source land recharge potential index; r (S) e ): the sensitivity index score of the underground water source; omega (S) e ) The weight of the sensitivity index of the underground water source; r (DI): a groundwater vulnerability index score value; ω (DI): an index of groundwater vulnerability; r (R) h ): strong pollution source and hazard index score value; omega (R) h ): the pollution source intensity and the weight of the hazard index; r (E) b ): compensating the value of the economic benefit index credit; omega (E) b ): and (5) complementing the weight of the economic benefit index.
2. The method for evaluating the suitability for replenishing an underground water source according to claim 1, wherein the determining whether the underground water source is a target underground water source comprises:
and judging whether the underground water source area belongs to a forward flood fan underground water system, mining shallow pore water from the water source area, and if so, determining the underground water source area as the target underground water source area.
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