CN102944904A - Anti-dilution measurement method for horizontal infiltration velocity of underground water - Google Patents

Abstract

The invention discloses an anti-dilution measurement method for horizontal infiltration velocity of underground water and belongs to the technical field of horizontal velocity measurement of the underground water. The detection device for measuring physical parameters is used for measuring physical parameter values in a certain time. The horizontal infiltration velocity at a testing point is determined according to changing relationship of the physical parameter values along with time. The anti-dilution measurement method is accurate in measuring result and suitable for measurement of the horizontal infiltration velocity of an underwater environment with high conductivity, high radioactivity intensity and high pollution degree. Injection of low-conductivity mutually soluble liquid cannot lead extra pollution on the underground water and cannot damage personnel.

Description

The anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water

Technical field

The invention discloses the anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water, belong to the technical field that the horizontal seepage velocity of underground water is measured.

Background technology

Trace method is the measurement seepage velocity method of commonly using, and it is to throw in tracer agent in boring that trace method is measured seepage velocity, can measure over time the seepage velocity at this place according to tracer agent.

The sniffer of measure physical parameters comprises probe and intelligent terminal, and probe comprises measurement/Control Component, throws source device and communication interface.Measurement/Control Component transfers to intelligent terminal by communication interface after the underground water physical parameter is converted to charge value.

The horizontal permeation flow velocity can only be applicable to the underground water less salt in the water-bearing zone, low-activity, free of contamination situation in traditional trace method mensuration water-bearing zone.Yet higher salinity is usually contained near some areas Natural Evaporating Ponds To The Atmosphere in the underground water, or contain radiomaterial, even be subject to pollution to a certain degree, in this case, traditional trace method just can't record the horizontal permeation flow velocity of underground water.

Summary of the invention

Technical matters to be solved by this invention is the deficiency for the above-mentioned background technology, and the anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water is provided.

The present invention adopts following technical scheme for achieving the above object:

The anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water comprises the steps:

Step 1 according to the sniffer of water environment State selective measurements physical parameter, is put into sniffer the measuring section of zone to be measured boring;

Step 2, but in the boring of zone to be measured, inject the low mutually soluble liquids of leading, record the measured physical parameter value of sniffer every a unit interval, but lead mutually soluble liquids by underground water-reducible time T from the beginning record data to finishing to measure to be designated as during this period of time to hang down; But the described low sniffer that mutually soluble liquids floods measure physical parameters selected in the step 1 of leading;

Step 3, but lead solution body and on average be divided into M time period by underground water-reducible time T low described in the step 2, and the n time period, interior physical parameter initial value was designated as X _{(n-1) T/M}, the physical parameter end value in the n time period is designated as X _NT/M,

Wherein: M is positive integer, 1≤n≤M;

Step 4, utilize following mathematical expression calculated level seepage velocity:

$v=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{v}_n=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}\frac{\mathrm{\πdM}}{4T}\·\ln \left(\frac{X_{\mathrm{nT}/M}}{X_{(n-1)T/M}}\right),n=\mathrm{1,2,3},\·\·\·\·\·\·M,$

Wherein, v _nBe the horizontal permeation flow velocity of n time period, d is bore diameter.

In the anti-dilution measurement method of the horizontal seepage velocity of described a kind of underground water, step 1 is according to the sniffer of water environment State selective measurements physical parameter, and implementation is as follows:

For environment under the high conductivity water, select the sniffer take conductance electrode as sensor to detect test waters electric conductivity value;

For high activity underwater environment, select the sniffer detection of radioactive count value take Geiger tube as sensor;

For high pollution degree underwater environment, select the detecting instrument detection of contamination concentration corresponding with the pollutant levels type.

In the anti-dilution measurement method of the horizontal seepage velocity of described a kind of underground water, the described physical parameter value of step 2:

Be electric conductivity value for environment under the high conductivity water;

Be the radioactive intensity value for high activity underwater environment;

Be the pollutant levels value for high pollution degree underwater environment.

In the anti-dilution measurement method of the horizontal seepage velocity of described a kind of underground water, low to lead mutually soluble liquids be weak, "dead", the free of contamination liquid of conductive capability but step 2 is described.

The present invention adopts technique scheme, have following beneficial effect: measurement result is accurate, be suitable for that high electricity is led, the measurement of high activity, high pollution degree underwater environment horizontal permeation flow velocity, but the low injection of leading mutually soluble liquids can not cause extra pollution to underground water, can not damage personnel yet.

Description of drawings

Fig. 1 is the process flow diagram of the anti-dilution measurement method of the horizontal seepage velocity of underground water.

Fig. 2 is the schematic diagram of embodiment.

Fig. 3 is that the electricity in the specific embodiment is led change curve.

Embodiment

Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:

As shown in Figure 1, the anti-dilution measurement method of the horizontal seepage velocity of underground water comprises the steps:

Step 1 as shown in Figure 2, according to the environmental selection measure physical parameters sniffer in test waters, for example for environment under the high conductivity water, selects the sniffer take conductance electrode as sensor to detect test waters electric conductivity value; For high activity underwater environment, select the sniffer detection of radioactive count value take Geiger tube as sensor; For high pollution degree underwater environment, select the detecting instrument detection of contamination concentration corresponding with the pollutant levels type (for example: for the silver ion waters that exceeds standard, adopt the concentration of silver ions detector to detect concentration of silver ions).The sniffer of measure physical parameters is put into the measuring section of zone to be measured boring.Sniffer also comprises data acquisition unit, probe and is used for communication module with compunication except comprising sensor (perhaps concentration monitor device).

Step 2, but in zone boring to be measured, inject the low mutually soluble liquids of leading, but this moment measuring section electricity lead, radioactive intensity or pollutant levels will obtain certain reducing owing to the low injection of leading mutually soluble liquids, but along with the carrying out of seepage flow can recover again gradually.Record the measured physical parameter value of sniffer every a unit interval (such as 10s), but lead mutually soluble liquids by underground water-reducible time T from the beginning record data to finishing to measure to be designated as during this period of time to hang down, subsidiary temporal information when the sniffer of measure physical parameters detects physical parameter value, but begin to be to the time interval that records the final physical parameter value that no longer changes and lowly lead solution body by underground water-reducible time T from recording the physical parameter initial value.

Low but to lead mutually soluble liquids be weak, "dead", the pollution-free liquid of conductive capability: such as pure water or alcohol, but also can choose other non-conductive liquid that can dissolve each other with water.Low lead mutually soluble liquids and flood the groundwater seepage measuring instrument.But the low amount of leading mutually soluble liquids decide according to the situation of on-the-spot underground water, and the amount when flow velocity is larger should be more, should so that when measurement physical parameter value present obvious variation.

For environment under the high conductivity water, physical parameter value is electric conductivity value; For high activity underwater environment, physical parameter value is the radioactive intensity value; For high pollution degree underwater environment, physical parameter value is the pollutant levels value.

Step 3 is led solution body and on average is divided into M time period by underground water-reducible time T but will hang down, and the physical parameter initial value in the n time period is designated as X _{(n-1) T/M}, the physical parameter end value in the n time period is designated as X _NT/M, M is positive integer.The physical parameter value that records is uploaded to computing machine through the communication module in the sniffer.

Step 4, satisfy expression formula (1) in the n section time:

$X_{\mathrm{nT}/M}=X_{(n-1)T/M}\·\exp (\frac{{4v}_n}{\mathrm{\πd}}\·\frac{T}{M}),n=\mathrm{1,2,3},\·\·\·\·\·\·M---\left(1\right),$

Then can get expression formula (2) calculated level seepage velocity:

$v=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{v}_n=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}\frac{\mathrm{\πdM}}{4T}\·\ln \left(\frac{X_{\mathrm{nT}/M}}{X_{(n-1)T/M}}\right),n=\mathrm{1,2,3},\·\·\·\·\·\·M---\left(2\right),$

Wherein, v _nBe the horizontal permeation flow velocity of n time period, d is bore diameter.

The high situation of underground water salinity in the boring adopts the mode of measuring electric conductivity value to test as example, bore diameter d=5cm during test, and the data that record are as shown in table 1.

Time (s)	Electricity is led (us)	Time (s)	Electricity is led (us)	Time (s)	Electricity is led (us)
						0	1068.2	210	1390.4	420	1933.3
10	1066.5	220	1405.9	430	1958.2
						20	1080.4	230	1466.8	440	1991.1
30	1077.1	240	1496.4	450	2023.5
						40	1060	250	1489	460	2058.9
50	1042.7	260	1510.2	470	2115.4
						60	1051.8	270	1510.1	480	2156.8
70	1114.5	280	1512.7	490	2173.3
						80	1123.6	290	1545.4	500	2190.4
90	1134.2	300	1594.3	510	2208
						100	1136.3	310	1601.8	520	2286.9
110	1150.1	320	1608	530	2299.1
						120	1151.2	330	1672.4	540	2333.5
130	1178.6	340	1713.8	550	2376.3
						140	1240.3	350	1756.2	560	2383
150	1251.2	360	1799.3	570	2401.4
						160	1241.1	370	1783.2	580	2448.6
170	1300.2	380	1790.7	590	2513.4
						180	1350.4	390	1812	600	2601.1
190	1354.3	400	1835.5	?	?
						200	1377.3	410	1895.7	?	?

Table 1 electricity is led time dependent tables of data

The electricity that draws according to table 1 is led change curve as shown in Figure 3, and we can be divided into 5 sections with whole Measuring Time (T=600s), and every section initial electricity is led and finished electricity and lead as shown in table 2:

The time period numbering	Initial electricity is led	Finishing electricity leads
			1	1068.2	1151.2
2	1151.2	1496.4
			3	1496.4	1799.3
4	1799.3	2156.8
			5	2156.8	2601.1

The initial electricity of each time period of table 2 is led and is finished electricity and lead

Calculate seepage velocity according to formula (1) and be about 5.0326m/d, this measurement result meets the fact.

In sum, measurement result of the present invention is accurate, is suitable for that high electricity is led, the measurement of high activity, high pollution degree underwater environment horizontal permeation flow velocity; But the low injection of leading mutually soluble liquids can not cause extra pollution to underground water, can not damage personnel yet.

Claims (4)

1. the anti-dilution measurement method of the horizontal seepage velocity of underground water is characterized in that comprising the steps:

Step 1 according to the sniffer of water environment State selective measurements physical parameter, is put into sniffer the measuring section of zone to be measured boring;

Step 2, but in the boring of zone to be measured, inject the low mutually soluble liquids of leading, record the measured physical parameter value of sniffer every a unit interval, but lead mutually soluble liquids by underground water-reducible time T from the beginning record data to finishing to measure to be designated as during this period of time to hang down; But describedly low lead mutually soluble liquids and flood sniffer selected in the step 1;

Step 3, but lead mutually soluble liquids and on average be divided into M time period by underground water-reducible time T low described in the step 2, and the n time period, interior physical parameter initial value was designated as X _{(n-1) T/M}, the physical parameter end value in the n time period is designated as X _NT/M,

Wherein: M is positive integer, 1≤n≤M;

Step 4, utilize following mathematical expression calculated level seepage velocity:

$v=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{v}_n=\frac{1}{M}\underset{n=1}{\overset{M}{\mathrm{\Σ}}}\frac{\mathrm{\πdM}}{4T}\·\ln \left(\frac{X_{\mathrm{nT}/M}}{X_{(n-1)T/M}}\right),n=\mathrm{1,2,3},\·\·\·\·\·\·M,$

Wherein, v _nBe the horizontal permeation flow velocity of n time period, d is bore diameter.

2. the anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water according to claim 1, it is characterized in that: according to the sniffer of water environment State selective measurements physical parameter, implementation is as follows in the step 1:

For environment under the high conductivity water, select the sniffer take conductance electrode as sensor to detect test waters electric conductivity value;

For high activity underwater environment, select the sniffer detection of radioactive count value take Geiger tube as sensor;

For high pollution degree underwater environment, select the detecting instrument detection of contamination concentration corresponding with the pollutant levels type.

3. the anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water according to claim 2 is characterized in that the physical parameter value described in the step 2:

Be electric conductivity value for environment under the high conductivity water;

Be the radioactive intensity value for high activity underwater environment;

Be the pollutant levels value for high pollution degree underwater environment.

4. it is characterized in that according to claim 1 or the anti-dilution measurement method of the horizontal seepage velocity of 3 described a kind of underground water: but the low mutually soluble liquids of leading described in the step 2 is weak, "dead", the free of contamination liquid of conductive capability.

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