CN102944904B - 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 conventional measurement seepage velocity method, and it is throw in tracer agent in boring that trace method measures seepage velocity, can measure the seepage velocity at this place according to tracer agent over time.

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 underground water physical parameter is converted to charge value.

Traditional trace method measures horizontal permeation flow velocity in water-bearing zone can only be applicable to the underground water less salt in water-bearing zone, low-activity, free of contamination situation.But some areas near Natural Evaporating Ponds To The Atmosphere, usually containing higher salinity in underground water, or containing radiomaterial, even receive pollution to a certain degree, in this case, traditional trace method just cannot 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 above-mentioned background technology, provides the anti-dilution measurement method of the horizontal seepage velocity of a kind of underground water.

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

An anti-dilution measurement method for the horizontal seepage velocity of underground water, comprises the steps:

Step 1, selects the sniffer of measure physical parameters according to water environment, sniffer is put into the measuring section of region to be measured boring;

Step 2, in the boring of region to be measured, inject low leading can mutually soluble liquids, record the physical parameter value measured by sniffer every a unit interval, from record data to end measure be designated as during this period of time low lead can mutually soluble liquids by the water-reducible time T in underground; Described low leading can to flood in step 1 sniffer of selected measure physical parameters by mutually soluble liquids;

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

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

Step 4, utilizes 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 the n-th 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 selects the sniffer of measure physical parameters according to water environment, is specifically implemented as follows:

For high conductance underwater environment, selecting with conductance electrode is that the sniffer of sensor detects test waters electric conductivity value;

For high activity underwater environment, selecting with Geiger tube is the sniffer detection of radioactive count value of sensor;

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

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

Be electric conductivity value for high conductance underwater environment;

Be radioactive intensity value for high activity underwater environment;

Be 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 the leading described in step 2 can mutually soluble liquids be weak, "dead", the free of contamination liquid of conductive capability.

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

Accompanying drawing explanation

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 the conductance change curve in specific embodiment.

Embodiment

Be described in detail 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, such as, for high conductance underwater environment, selecting with conductance electrode is that the sniffer of sensor detects test waters electric conductivity value; For high activity underwater environment, selecting with Geiger tube is the sniffer detection of radioactive count value of sensor; For high pollution degree underwater environment, select the detecting instrument detection of contamination concentration corresponding with pollutant levels type (such as: silver ion is exceeded standard waters, adopts concentration of silver ions detector to detect concentration of silver ions).The sniffer of measure physical parameters is put into the measuring section of region to be measured boring.Sniffer, except comprising sensor (or concentration monitoring device), also comprises data acquisition unit, probe and for the communication module with compunication.

Step 2, in the boring of region to be measured, inject low leading can mutually soluble liquids, now the conductance of measuring section, radioactive intensity or pollutant levels by due to low lead can mutually soluble liquids injection and obtain certain reduction, but to recover gradually again along with the carrying out of seepage flow.The physical parameter value measured by sniffer is recorded every a unit interval (as 10s), from record data to end measure be designated as during this period of time low lead can mutually soluble liquids by the water-reducible time T in underground, subsidiary temporal information when the sniffer of measure physical parameters detects physical parameter value, from recording physical parameter initial value to the time interval recording the physical parameter value finally no longer changed be low lead can solution body by the water-reducible time T in underground.

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

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

Step 3, low leading can be on average divided into M time period by the water-reducible time T in underground by solution body, and the physical parameter initial value in the n-th time period is designated as X _{(n-1) T/M}, the physical parameter end value in the n-th time period is designated as X _nT/M, M is positive integer.The communication module of the physical parameter value recorded in sniffer is uploaded to computing machine.

Step 4, meets expression formula (1) in n-th period:

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

Then can obtain 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 the n-th time period, d is bore diameter.

With the high situation of underground water salinity in boring for example, adopt the mode measuring electric conductivity value to test, bore diameter d=5cm during test, the data recorded are as shown in table 1.

Time (s)	Conductance (us)	Time (s)	Conductance (us)	Time (s)	Conductance (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

The time dependent tables of data of table 1 conductance

Draw conductance change curve as shown in Figure 3 according to table 1, whole Measuring Time (T=600s) can be divided into 5 sections by us, the initial conductance of every section and to terminate conductance as shown in table 2:

Time period numbers	Initial conductance	Terminate conductance
			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

Initial conductance and the end conductance of each time period of table 2

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 the measurement of high conductance, high activity, high pollution degree underwater environment horizontal permeation flow velocity; Low leading the injection of mutually soluble liquids can not cause extra pollution to underground water, also can not damage personnel.

Claims (2)

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

Step 1, selects the sniffer of measure physical parameters according to water environment, sniffer is put into the measuring section of region to be measured boring:

For high conductance underwater environment, selecting with conductance electrode is that the sniffer of sensor detects test waters electric conductivity value;

For high activity underwater environment, selecting with Geiger tube is the sniffer detection of radioactive count value of sensor;

For high pollution degree underwater environment, select the sniffer detection of contamination concentration corresponding with pollutant levels type;

Step 2, in the boring of region to be measured, inject low leading can mutually soluble liquids, record the physical parameter value measured by sniffer every a unit interval, from record data to end measure be designated as during this period of time low lead can mutually soluble liquids by the water-reducible time T in underground; Described low leading can flood sniffer selected in step 1, described physical parameter value by mutually soluble liquids:

Be electric conductivity value for high conductance underwater environment;

Be radioactive intensity value for high activity underwater environment;

Be pollutant levels value for high pollution degree underwater environment;

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

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

Step 4, utilizes 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 the n-th 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, is characterized in that: low the leading described in step 2 can mutually soluble liquids be weak, "dead", the free of contamination liquid of conductive capability.