CN107462684B - The test method of interflow water age parsing based on tracer technique - Google Patents
The test method of interflow water age parsing based on tracer technique Download PDFInfo
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- CN107462684B CN107462684B CN201710588991.3A CN201710588991A CN107462684B CN 107462684 B CN107462684 B CN 107462684B CN 201710588991 A CN201710588991 A CN 201710588991A CN 107462684 B CN107462684 B CN 107462684B
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Abstract
The present invention discloses a kind of test method of the interflow water age parsing based on tracer technique, including step：1) from sampling position, acquisition undisturbed soil sample makes experiment soil column；2) it takes 3 kinds of tracers to be separately added into water, and solution is made；3) the first reactor solution is entered to be seeped into the form of rain making in the experiment soil column, the soil water is fed with simulated precipitation Water log infiltration, second of reactor solution is risen into the supply soil water by hollow billet, until the soil water in the experiment soil column reaches saturation state；4) the third reactor solution is entered to be seeped into equally in the form of rain making in the experiment soil column, and in the different height and bottom collection water sample of the experiment soil column, until no longer containing the first tracer and second of tracer in water sample, the volume used in the third reactor solution is recorded；5) according to the average annual precipitation of collecting soil sample point, the water age of such soil interflow is calculated.
Description
Technical field
The test method for the interflow water age parsing based on tracer technique that the present invention relates to a kind of.
Background technology
Interflow is in the soil along different pervious soil bed boundary flowing water streams, it is the important composition portion of runoff
Point, watershed Runoff adjustment, water conservation, silt migration, nutrient loss and River Basin Hydrology cycle calculations all have very heavy
The effect wanted.For soil moisture by collective effects such as rainfall infiltration, irrigation, evaporation, the recharges of ground water, variation is complicated.
Using tracer can the preferably dust trajectory of tracer moisture in the soil, to the dust trajectory and fortune of interflow
It moves speed and carries out tracer study, while this method can carry out tracer under the premise of not disturbed soil to the migration of moisture.
It is under rainfall or irrigation conditions to infiltrate, and moisture passes through the horizontal or vertical process into soil of soil surface.Ground
Lower water supply is the process that underground water enters soil in soil layer lower part along soil capillary.
Before rain on the one hand influence of the soil moisture content to interflow is shown in the influence to Infiltration rate, there is research
The infiltration rate and soil moisture content for showing moisture are inversely proportional, while the more big then hillside fields interflow production stream of soil moisture content before rain
The time of beginning obviously shifts to an earlier date.And influence of the soil moisture content to interflow another aspect shows the benefit for interflow before rain
To upper, for identical rainfall, the more big then interflow runoff yield of soil moisture content is bigger before rain, native before relatively high rain
Earth water content is one of the essential condition that interflow generates.
It is found when studying the production stream source of interflow, source can be divided into Xin Shui and Jiu Shui, a new water i.e. rainfall
The moisture supplemented in runoff event, and old water is then to store in the soil or the moisture of earth's surface before rainfall.Xin Shui and old water pair
It has nothing in common with each other in the arbitrary way of runoff, such as after rainfall falls on earth's surface, the moisture that runoff receives rainfall supplement initially forms,
And after in rain infiltration to soil, the moisture (i.e. old water) stored before rainfall in the soil can be come out by displacement, be dissolved into
In this rainfall-runoff process in generated interflow, interflow is formed, and then generates the result of new and old water mixing.
Invention content
The test method for the interflow water age parsing based on tracer technique that the object of the present invention is to provide a kind of, passes through simulation
Precipitation infiltration recharge rises the process of the supply soil water with underground water hollow billet, and the soil water is by complete displacement before further deriving rain
Go out unexpected required time, calculates that resultant error is small and easy to operation.
In order to solve the above technical problems, the present invention provides a kind of experiment side of the interflow water age parsing based on tracer technique
Method, which is characterized in that including step：
1) from sampling position, acquisition undisturbed soil sample makes experiment soil column；
2) it takes 3 kinds of tracers to be separately added into water, and solution is made；
3) the first reactor solution is entered to be seeped into the form of rain making in the experiment soil column, to simulate drop
Water Water log infiltration feeds the soil water, second of reactor solution is risen the supply soil water by hollow billet, until the experiment is former
The soil water in shape earth pillar reaches saturation state；
4) the third reactor solution is entered to be seeped into equally in the form of rain making in the experiment soil column, and
The different height and bottom collection water sample of the experiment soil column, until no longer containing the first tracer and second in water sample
Kind tracer, records the volume used in the third reactor solution；
5) according to the average annual precipitation of collecting soil sample point, the water age of such soil interflow is calculated.
Preferably, the experiment soil column derives from the undisturbed soil sample of sampling position acquisition, the experiment soil column
As a kind of soil morphology of near-nature forest state.
Preferably, tracer used is not adsorbed by soil particle.
Further, the soil water is by the time (t) of precipitation complete displacement from soil, i.e. water age before calculating sampling position rain,
Formula be：
Wherein, t is the soil water before the rain of sampling position by the time (day) of precipitation complete displacement from soil, VAlwaysFor the third
The first reactor solution and second of reactor solution, amount used (L), S are reactor solution when displacement from soil completely
The upper bottom surface of the experiment soil column accumulates (m2), P is the average annual precipitation (mm) of sampling position.
Beneficial effects of the present invention are：The application is risen by experimental simulation precipitation infiltration recharge and underground water hollow billet to be fed
The process of the soil water, the soil water goes out soil required time by complete displacement before further deriving rain.
Description of the drawings
Hereinafter it is described more fully with reference to the accompanying drawings some example embodiments of the present invention；However, the present invention can be with
It embodies in different forms, should not be considered limited to embodiments set forth herein.On the contrary, attached drawing illustrates together with specification
Some example embodiments of the present invention, and principle for explaining the present invention and aspect.
In the figure for clarity, size may be exaggerated.Throughout, identical reference numeral refers to identical
Element.
Fig. 1 is the flow chart according to a kind of test method of interflow water age parsing based on tracer technique of the present invention.
Specific implementation mode
In the following detailed description, certain exemplary embodiments of the invention are shown simply by the mode of illustration
And description.As the skilled person will recognize, described embodiment can be changed in a variety of ways,
All without departing from the spirit or scope of the present invention.Therefore, scheme and describe to be considered as inherently illustrative, and
It is not limiting.
Hereinafter, the interflow water age parsing according to the present invention based on tracer technique is more fully described with reference to the accompanying drawings
Test method.
A kind of test method of the interflow water age parsing based on tracer technique, this approach includes the following steps：
Step S1：From sampling position, acquisition undisturbed soil sample makes experiment soil column；
Step S2：It takes 3 kinds of tracers to be separately added into water, and solution is made；
Step S3：The first reactor solution is entered to be seeped into experiment soil column, with simulation in the form of rain making
Precipitation Water log infiltration feeds the soil water, second of reactor solution is risen the supply soil water by hollow billet, until experiment original state
The soil water in earth pillar reaches saturation state；
Step S4：The third reactor solution is entered to be seeped into experiment soil column equally in the form of rain making, and
Water sample is collected in the different height of experiment soil column and bottom setting acquisition hole, until no longer containing the first tracer in water sample
Agent and second of tracer, record the volume used in the third reactor solution；
Step S5：According to the average annual precipitation of collecting soil sample point, the water age of such soil interflow is calculated.
Preferably, experiment soil column derives from the undisturbed soil sample of sampling position acquisition, and the experiment soil column is as one
The soil morphology of kind near-nature forest state.
Preferably, tracer used is tested not adsorbed by soil particle.
In experiment, the first described reactor solution is entered to be seeped into the form of rain making in experiment soil column, and second
Kind reactor solution feeds the soil water by capillarity, as the soil water before rain；When can't detect the first tracer in water sample
When agent and second of tracer, that is, think the soil water complete displacement from soil by the third reactor solution completely before rain, remembers
Record the third reactor solution amount used V at this timeAlways(L)。
The soil water is by the time (t) of precipitation complete displacement from soil, i.e. water age before calculating sampling position rain, formula
For：
Wherein, t is the soil water before the rain of sampling position by the time (day) of precipitation complete displacement from soil, VAlwaysFor the third
Reactor solution completely the first reactor solution and second of reactor solution from soil amount used when complete displacement
(L), S is the upper bottom surface product (m for testing soil column2), P is the average annual precipitation (mm) of sampling position.
The test method of interflow water age parsing of the present invention based on tracer technique, it is simple easily operated, lead to
It crosses simulated precipitation and infiltrates the process that supply rises the supply soil water with underground water hollow billet, the soil water is complete before further deriving rain
Full displacement goes out unexpected required time, calculates that resultant error is small.
Claims (3)
1. a kind of test method of the interflow water age parsing based on tracer technique, which is characterized in that including step：
1) from sampling position, acquisition undisturbed soil sample makes experiment soil column；
2) it takes 3 kinds of tracers to be separately added into water, and solution is made；
3) the first reactor solution is entered to be seeped into the form of rain making in the experiment soil column, is accumulated with simulated precipitation
Water infiltrates the supply soil water, second of reactor solution is risen the supply soil water by hollow billet, until the experiment undisturbed soil
The soil water in column reaches saturation state；
4) the third reactor solution is entered to be seeped into equally in the form of rain making in the experiment soil column, and described
The different height and bottom collection water sample of soil column are tested, until no longer containing the first tracer in water sample and showing for second
Track agent records the volume used in the third reactor solution；
5) according to the average annual precipitation of collecting soil sample point, the water age of such soil interflow is calculated, wherein calculating sampling site
By precipitation, the formula of the time (t) of complete displacement from soil is the soil water before point rain：
Wherein, t is the soil water before the rain of sampling position by the time of precipitation complete displacement from soil, VAlwaysIt is molten for the third tracer
The first reactor solution and second of reactor solution, amount used, S are that the experiment is former to liquid when displacement from soil completely
The upper bottom surface of shape earth pillar accumulates, and P is the average annual precipitation of sampling position.
2. test method according to claim 1, which is characterized in that the experiment soil column is adopted from sampling position
The undisturbed soil sample of collection, the experiment soil column is as a kind of soil morphology of near-nature forest state.
3. test method according to claim 1, which is characterized in that tracer used is not adsorbed by soil particle.
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| CN111220785A (en) * | 2020-01-21 | 2020-06-02 | 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） | Method for detecting water age of water body |
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| CN105158444B (en) * | 2015-09-28 | 2016-10-05 | 浙江大学 | Domatic interflow flow velocity and flow measuring systems and method |
| CN105808812A (en) * | 2015-12-16 | 2016-07-27 | 北京师范大学 | Two-dimensional mesoscopic numerical value simulation method of water age of surface water |
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