CN108828675B - A kind of artificial swamp blocking region detection method for strengthening resistivity contrasts - Google Patents
A kind of artificial swamp blocking region detection method for strengthening resistivity contrasts Download PDFInfo
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- CN108828675B CN108828675B CN201810656942.3A CN201810656942A CN108828675B CN 108828675 B CN108828675 B CN 108828675B CN 201810656942 A CN201810656942 A CN 201810656942A CN 108828675 B CN108828675 B CN 108828675B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
Abstract
The invention discloses a kind of artificial swamp blocking region detection methods for strengthening resistivity contrasts.Strengthen the resistivity contrasts of blocking region Yu unplugged region by way of adding NaCl solution.After adding NaCl solution, NaCl solution can not be flowed into blocking region in the short time, so the resistivity of blocking region can be higher than unplugged zone resistance rate.Therefore, not being added and be added the resistivity distribution that NaCl solution measures, there are larger differences, and due to the presence of blocking region in NaCl solution saturation artificial swamp, it is larger compared to the artificial swamp resistivity changes in distribution that NaCl solution is not added, the high resistance region occurred on its resistivity distribution map is blocking region, realizes the monitoring and positioning of artificial swamp blocking region.The present invention have the characteristics that it is simple, economical, easy to implement, for artificial swamp persistently, efficient operation strong technical guarantee is provided.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of artificial swamp bottleneck area for strengthening resistivity contrasts
Domain detection method.
Background technique
Constructed wetland waste water treatment technology is a kind of sewage treatment ecological engineering technology risen the 1970s, by
In having many advantages, such as that flexibility is good, small investment, low energy consumption, dirt-removing power is stronger, convenient for management, without secondary pollution, using increasingly
Generally.However in recent years, artificial swamp frequently occurs the problems such as blocking, purifying property decline, service life in the process of running
Shorten.As in 355 drowned flow artificial wet lands of the U.S. and Britain, nearly half is blocked in using 5 years, and filler waterpower passes
Conductance declines to a great extent, and 80% water flow directly more flows discharge system by bed body surface, and effluent quality deteriorates, and the length of service is by designing
When 50-100 be reduced to 10 years, 5 years even it is shorter；The artificial swamps such as domestic white clay hole, wild goose field, Shatian also occur not
With the clogging of degree.As it can be seen that the blockage problem inside artificial wet land system has seriously affected the lasting, high of artificial swamp
Effect operation.
Currently, it is relatively simple to the research method of artificial swamp generation judgment of clogging, it is all based on the apparent of tracer experiment
Hydraulic detention time (HRT) and residence time destribution (RDT) study artificial swamp hydraulic performance characteristics, and pass through artificial swamp
Hydraulic performance determines whether artificial swamp blocks.However the method for this determining blocking is both for artificial swamp entirety
It is evaluated, blocking region accurately can not be forecast and be positioned, cause to be directed to when administering blocking
Artificial swamp integrally carries out replacement filler or dredging, time cost height, deficiency in economic performance.Therefore, for artificial swamp bottleneck area
The accurate monitoring in domain is a problem to be solved.
Summary of the invention
The purpose of the present invention is that accurately can not monitor and position blocking region for existing artificial swamp, blocking is caused to administer
The problem of safeguarding no effective technical basis provides a kind of detection method easy to implement, blocking monitoring and accurate positioning, can
The accurate monitoring and positioning for realizing artificial swamp blocking region, provide technical guarantee for the lasting of artificial swamp, efficient operation.
Specific steps are as follows:
(1) artificial swamp data collection: mainly including bed structure and filler.
(2) it is primarily based on the reset condition of artificial swamp, in the case where NaCl solution is not added, measures artificial swamp
Resistivity distribution situation.
(3) NaCl solution that concentration is 100-400mg/L is added in artificial swamp inhalant region, and continues to be set with NaCl solution
Change the sewage in artificial swamp.
(4) concentration for monitoring NaCl solution at artificial wetland effluent mouth, when the NaCl solution concentration in artificial wetland effluent
When identical as the NaCl solution concentration of addition, artificial swamp Inlet and outlet water is closed, until being measured.
(5) the resistivity distribution of measurement NaCl solution saturation artificial swamp.
(6) the resistivity distribution map of NaCl solution and NaCl solution saturation artificial swamp is not added for comparison, if Manual moist
Ground is there is no blocking, and each section Resistivity Characteristics are similar, and resistivity difference in distribution is little.
(7) if artificial swamp blocks, the filler hole in blocking region is mostly inorganic matter, insoluble organic
Object, dissolved organic matter and specific gravity is smaller and moisture content be up to 99% the filling of activated sludge shape substance；In addition, due in water
Humus, fulvic acid and plant fiber organic matter to be capable of forming low-density, the gel of high retentiveness sludge-filled, to make
Blocking region hydraulic conductivity decreases up to blocking, therefore after addition NaCl solution, can not flow into the short time in blocking region
NaCl solution, so the resistivity of blocking region can be higher than unplugged zone resistance rate.Therefore, it is not added and that NaCl is added is molten
There are larger differences for the resistivity distribution that liquid measures, and due to the presence of blocking region, phase in NaCl solution saturation artificial swamp
It is larger compared with the artificial swamp resistivity changes in distribution that NaCl solution is not added, the high resistance region occurred on resistivity distribution map
As blocking region is so far able to achieve the monitoring and positioning of artificial swamp blocking region.
The beneficial effects of the present invention are: the present invention is directed to the monitoring and positioning of artificial swamp blocking region, Manual moist is filled up
The accurate blank monitored and position of ground blocking.This method by promote, by for the processing of artificial swamp, operation and maintenance and manually
The lasting of wetland, efficient operation provide technical guarantee.
Detailed description of the invention
Fig. 1 is the artificial swamp blocking region detection method flow chart that the present invention strengthens resistivity contrasts.
Fig. 2 is that NaCl solution of the embodiment of the present invention is saturated quartz sand resistivity curve figure.
Fig. 3 is the artificial swamp resistivity distribution map that NaCl solution is not added for the embodiment of the present invention.
Fig. 4 is the artificial swamp resistivity distribution map that NaCl solution is added in the embodiment of the present invention.
Marked in the figure: 1 is unplugged region；2 be blocking region.
Specific embodiment
It is only presently preferred embodiments of the present invention below, is not intended to limit the present invention in any form.
Embodiment:
The present embodiment is a small-sized drowned flow artificial wet land, and wet land filler is quartz sand.
It is a kind of strengthen resistivity contrasts artificial swamp blocking detection method be applied to the artificial Wetland clogging regionally detecting
Flow chart as shown in Figure 1, on the basis of collecting and surveying artificial swamp existence conditions, logged well using improved single hole high density
Method has carried out the blocking region detection experiment for not being added and being added NaCl solution to the artificial swamp, and according to experimental result
Judgment of clogging and positioning are carried out.Specific implementation step (flow chart based on Fig. 1) is as follows:
(1) artificial swamp data collection: the artificial swamp is three layers of layering packing artificial wetland, every layer with a thickness of 30cm,
Upper, middle and lower-ranking filler is respectively fine grain quartz sand, medium grain size quartz sand and coarse grain diameter quartz sand.
(2) it is primarily based on the reset condition of artificial swamp, in the case where NaCl solution is not added, using improved single hole
High density logging method measures the resistivity distribution situation of artificial swamp, and measurement result is as shown in Figure 3.
(3) quartz sand resistivity sample measurement experiment result (Fig. 2) is saturated according to NaCl solution, added in the artificial swamp
Adding concentration is the NaCl solution of 200mg/L, and sewage can be made to be saturated quartz sand resistivity from 190It is reduced to 62, manually
The resistivity contrasts of wetland background resistivity and blocking region reach 2 times, and resistivity contrasts is made to be strengthened, and improve blocking region
Detection accuracy.Therefore, the present embodiment joined concentration in artificial swamp inhalant region as the NaCl solution of 200mg/L, and continue to use
NaCl solution displaces the sewage in artificial swamp.
(4) concentration for monitoring NaCl solution at artificial wetland effluent mouth, when the NaCl solution concentration in artificial wetland effluent
When identical as the NaCl solution concentration of addition, artificial swamp Inlet and outlet water is closed, until being measured.
(5) it is distributed using the resistivity of improved single hole high density logging method measurement NaCl solution saturation artificial swamp,
Measurement result is as shown in Figure 4.
(6) the resistivity distribution of NaCl solution (Fig. 3) and NaCl solution (Fig. 4) saturation artificial swamp is not added for comparative analysis
Figure.
If there is no blockings for artificial swamp, as shown in figure 3, each section Resistivity Characteristics are similar, resistivity distribution is poor
Not less, it is less susceptible to mark off blocking region from resistivity distribution map.
If artificial swamp blocks, the filler hole in blocking region be mostly inorganic matter, insoluble organic matter,
Dissolved organic matter and specific gravity is smaller and moisture content is up to the filling such as 99% activated sludge shape substance；In addition, due in water
It is sludge-filled that the organic matters such as humus, fulvic acid and plant fiber are capable of forming low-density, the gel of high retentiveness, to make
Blocking region hydraulic conductivity decreases up to blocking, therefore after addition NaCl solution, can not flow into the short time in blocking region
NaCl solution, so the resistivity of blocking region 2 can be higher than unplugged 1 resistivity of region.
(7) therefore, not being added and be added the resistivity distribution that NaCl solution measures, there are larger differences, and NaCl solution is full
With the presence in artificial swamp due to blocking region, compared to be not added the artificial swamp resistivity changes in distribution of NaCl solution compared with
Greatly, the high resistance region occurred on resistivity distribution map is blocking region 2, so far can realize the prison of artificial swamp blocking region
It surveys and positions.
(8) it in order to more accurately carry out blocking monitoring and positioning to artificial swamp, can once be monitored every 3-6 months
Measurement, and the data that each period monitors are compared, blocking position can be not only monitored in this way, but also can be supervised
Survey the development of blocking.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, it is all according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, still belong to the present invention
The protection scope of scheme.
Claims (1)
1. a kind of artificial swamp blocking region detection method for strengthening resistivity contrasts, it is characterised in that specific steps are as follows:
(1) the artificial swamp resistivity distribution that NaCl solution is not added is measured first；
(2) NaCl solution that concentration is 100-400mg/L is added by artificial swamp inhalant region；
(3) continue to displace the sewage in artificial swamp with NaCl solution；
(4) when the NaCl solution concentration in artificial wetland effluent is identical as the NaCl solution concentration of addition, artificial swamp is closed
Inlet and outlet water, until being measured；
(5) the resistivity distribution of measurement NaCl solution saturation artificial swamp；
(6) the resistivity distribution map of NaCl solution and NaCl solution saturation artificial swamp is not added for comparison；
(7) analysis resistivity contrasts figure, if two resistivity distributions are there are larger difference, NaCl solution is saturated in artificial swamp
High resistance region be blocking region.
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525839A (en) * | 2020-11-18 | 2021-03-19 | 中国科学院水生生物研究所 | Constructed wetland blockage and short flow detection method based on specific tracer |
| CN112505094B (en) * | 2020-11-18 | 2021-08-17 | 中国科学院水生生物研究所 | Method and system for detecting short flow and blockage of large-scale surface flow wetland |
| CN117263392A (en) * | 2023-11-16 | 2023-12-22 | 哈尔滨师范大学 | Anti-blocking constructed wetland structure and detection method |
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| CN104049279A (en) * | 2014-06-28 | 2014-09-17 | 桂林理工大学 | Method for positioning artificial wetland clogging area through resistivity curve |
| CN104360398A (en) * | 2014-11-23 | 2015-02-18 | 桂林理工大学 | Method for positioning constructed wetland blocked area on basis of two-dimensional resistivity imaging technology |
| CN105447762A (en) * | 2015-12-08 | 2016-03-30 | 中国石油天然气集团公司 | Calculation method for low permeability reservoir flooding information of fluid replacement |
| CN106680326A (en) * | 2016-12-15 | 2017-05-17 | 山东大学 | Method for detecting clogging of subsurface flow constructed wetland |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170285212A1 (en) * | 2016-04-01 | 2017-10-05 | Schlumberger Technology Corporation | System and method for measuring downhole parameters |
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|---|---|---|---|---|
| CN104049279A (en) * | 2014-06-28 | 2014-09-17 | 桂林理工大学 | Method for positioning artificial wetland clogging area through resistivity curve |
| CN104360398A (en) * | 2014-11-23 | 2015-02-18 | 桂林理工大学 | Method for positioning constructed wetland blocked area on basis of two-dimensional resistivity imaging technology |
| CN105447762A (en) * | 2015-12-08 | 2016-03-30 | 中国石油天然气集团公司 | Calculation method for low permeability reservoir flooding information of fluid replacement |
| CN106680326A (en) * | 2016-12-15 | 2017-05-17 | 山东大学 | Method for detecting clogging of subsurface flow constructed wetland |
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Application publication date: 20181116 Assignee: Nanning Zhongli Environmental Protection Equipment Processing Factory Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000530 Denomination of invention: A Method of Detecting Blocked Area in Constructed Wetland with Enhanced Resistivity Difference Granted publication date: 20191126 License type: Common License Record date: 20221229 |
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