CN102866427A - Method for testing hydraulic connection between unsaturated zone soil and groundwater - Google Patents
Method for testing hydraulic connection between unsaturated zone soil and groundwater Download PDFInfo
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- CN102866427A CN102866427A CN2012103485664A CN201210348566A CN102866427A CN 102866427 A CN102866427 A CN 102866427A CN 2012103485664 A CN2012103485664 A CN 2012103485664A CN 201210348566 A CN201210348566 A CN 201210348566A CN 102866427 A CN102866427 A CN 102866427A
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Abstract
The invention discloses a method for testing hydraulic connection between unsaturated zone soil and groundwater, and belongs to a method for testing a hydraulic connection condition. The method comprises the following steps of: collecting a probing area hydrogeological condition and terrain information; distributing a measurement line; allowing a radar antenna to be in contact with the ground; holding a global positioning system (GPS) and a tape measure through hands by virtue of a ground penetrating radar system; carrying out probing from one end of the measurement line according to a fixed point distance; holding the GPS by the hand to record space coordinate information of each measurement point; processing and explaining collected radar data by virtue of analysis software; performing time-depth conversion to identify an obvious in-phase axis from a collection radar section picture and determining the position of a capillary water zone of an underground level plane in a section picture; extracting a zone (above the capillary water zone from the section picture) for which radar signal amplitude intensity is relatively stable; and determining the hydraulic connection condition of the groundwater and the unsaturated zone soil according to the distribution variation degree of an interrupted zone. The method has the characteristics of flexibility, high efficiency, low cost, intuition and the like, and is particularly suitable for areas having low soil water contents and groundwater with relatively high burial depth.
Description
Technical field
The present invention relates generally to the assay method of hydraulic connection between a kind of assay method of hydraulic connection situation, particularly aerated zone soil and the underground latent water.
Background technology
Hydraulic connection can be divided into both direction, and a kind of is the downward recharge of phreatic water of surface water; Another kind is underground latent water by capillarity to the aerated zone soil supply of water level face top.Hydraulic connection situation between underground latent water and the aerated zone soil will directly affect the distribution of the root zone holard, and the growing of vegetation.Implement Vegetation Construction in the drought and water shortage area, the WATER LEVEL CHANGES that the mankind's activities such as evaluation mining, underground water pump drainage cause is on the impact of vegetation; Complex relationship between understanding underground water and the natural vegetation; Judge surface water to underground water infiltrate supply capacity and underground latent water to the supply capacity of aerated zone soil, all need to measure this hydraulic connection.
When the underground latent water buried depth was more shallow, underground latent water was obvious to the supply of aerated zone soil water, has comparatively strong hydraulic connection.But when the underground latent water buried depth is darker (below 10m), because capillarity is limited, whether different soil textures, underground latent water and top soil produce hydraulic connection is difficult to determine.Measuring hydraulic connection, is vertical distribution situation of grasping the holard in essence.Usually the assay method that adopts mainly contains two kinds: a kind of is excavation soil profile soil sampling, this method is consuming time, effort, destroy the earth's surface, cutting depth is often more shallow, be difficult to satisfy underground water level is buried the mensuration of distinguishing deeper hydraulic connection.Second method is by boring, and Xiang Kongzhong throws in detection instrument, carries out the holard and measures.Its shortcoming cost that is to drill is higher, and popularization, operability are relatively poor.On the whole, traditional assay method investigation depth is limited, waste time and energy, cost is high, and also will have influence on the precision of soil hydraulic connection measurement result to the destruction of the earth's surface soil body.
Summary of the invention
The purpose of this invention is to provide a kind of simple to operate, can direct detection aerated zone soil water and underground latent water between the assay method of hydraulic connection, solve traditional assay method investigation depth limited, waste time and energy, cost is high, and also will have influence on the problem of soil hydraulic connection measurement result precision to the destruction of the earth's surface soil body.
For achieving the above object, aerated zone soil of the present invention and underground latent water hydraulic connection assay method:
A. adopt ground penetrating radar system, in underground latent water buried depth 10m, adopt 100MHz to 50MHz radar antenna; When diving buried depth during greater than 10m, adopt 50MHz to 25MHz antenna; Be equipped with simultaneously one of portable handhold GPS, one of the tape measure of 30m; According to atural object property settings corresponding instrument parameter: stop the sample frequency and be 512MHz, sampled point apart from being that 1m, stacking fold are 128 times for 1m to 2m, antenna distance;
B. collect search coverage hydrogeological condition, terrain information, the mild ground penetrating radar line of observation of laying is avoided significantly zone of topographic relief continuously, makes radar antenna and ground good contact, and guarantees that as far as possible survey line length is more than 30m; Begin to launch tape measure to the other end from survey line one end, then begin by set point to survey and to utilize simultaneously handhold GPS to record the volume coordinate information of each measuring point, until finish the whole piece survey line apart from detection from the survey line starting point;
C. with the data importing computer that gathers, utilize Reflex specialty analysis software to the radar data of collection in worksite process decipher, with the time deeply change, the radar sectional view that obtains from processing identifies obvious lineups, and definite groundwater level face and the high capillary water zone position in sectional view of top 1m thereof;
D. extract from sectional view near the metastable interval of radar signal amplitude, capillary water zone top, this interval is the hydraulic connection band of discontinuance of underground latent water and aerated zone soil; From thickness, the degree of depth of band of discontinuance, and the distribution degree of variation of top radar amplitude signal can be determined the hydraulic connection situation of underground latent water and aerated zone soil.
Beneficial effect, owing to having adopted such scheme, the low-frequency electromagnetic wave signal that utilizes the ground penetrating radar emission and receive is to responsive these characteristics of soil moisture, reflection of electromagnetic wave signal amplitude intensity profile map according to the decipher acquisition, differentiate groundwater level, capillary water zone position, and the thickness of waterpower band of discontinuance and the degree of depth, thereby the hydraulic connection supply situation between grasp top soil and the underground latent water.Solved traditional assay method investigation depth limited, waste time and energy, cost is high, and also will have influence on the problem of soil hydraulic connection measurement result precision to the destruction of the earth's surface soil body, reached purpose of the present invention.
Advantage: the characteristics such as the method has flexibly, high-level efficiency, cost are low, directly perceived are particularly useful for the zone that Soil Water Content is lower, the underground latent water buried depth is larger.
1, compare this detection method of classic method and need not excavate, drill, flexible, detection efficiency improves greatly, and has reduced cost of determination.
2, avoided destruction to soil structures, protected the landscape environment on earth's surface, and guaranteed the accuracy of measurement result.
3, can effectively improve the mensuration degree of depth, solved the assay method investigation depth limited, waste time and energy, cost is high, and also will have influence on the problem of soil hydraulic connection measurement result precision to the destruction of the earth's surface soil body.
Description of drawings
Fig. 1 is that aerated zone soil of the present invention and underground latent water hydraulic connection are measured diagrammatic cross-section.
Embodiment
Embodiment 1: adopt modern geophysical probing technique--ground penetrating radar GPR measure underground latent water with its above hydraulic connection between the aerated zone soil; The method is particularly useful for the zone that soil moisture content is lower, the underground latent water buried depth is larger.
At first collect search coverage hydrogeological condition, terrain information, especially suitable Soil Water Content is less than normal, resistivity is bigger than normal, diving buried depth zone bigger than normal, lay gently continuously the ground penetrating radar line of observation, avoid topographic relief significantly to lay survey line in the zone, so that radar antenna and ground good contact, and guarantee that as far as possible survey line length is more than 30m; Adopt Sweden RAMAC ground penetrating radar system, when in the underground latent water buried depth 10m, adopt 100MHz to 50MHz radar antenna; When diving buried depth during greater than 10m, adopt 50MHz to 25MHz antenna; Carry simultaneously one of portable handhold GPS, one of the tape measure of 30m; According to atural object property settings corresponding instrument parameter: sample frequency is 512 MHz; The sampled point distance is 1m to 2m; Antenna distance is 1m; Stacking fold is 128 times; Begin to launch tape measure to the other end from survey line one end, then begin by set point apart from detection from the survey line starting point, survey and utilize simultaneously handhold GPS to record the volume coordinate information of each measuring point, answer closing hand phone and transmission of wireless signals equipment in the mensuration process, until finish the whole piece survey line; With the data importing computer that gathers, utilize Reflex specialty analysis software to the radar data of collection in worksite process decipher, with the time deeply change, the radar sectional view that obtains from processing identifies obvious lineups, and definite groundwater level face and the high capillary water zone position in sectional view of top 1m thereof; Extract from sectional view near the most stable interval of radar signal amplitude, capillary water zone top, this interval is the hydraulic connection band of discontinuance of underground latent water and aerated zone soil; A little less than this band of discontinuance was subjected to ooze under underground latent water and the surface water and affects, soil moisture was the hydraulic connection band of discontinuance of underground latent water and aerated zone soil without obvious variation; From thickness, the degree of depth of band of discontinuance, and the distribution degree of variation of the top holard can be determined the hydraulic connection situation of underground latent water and aerated zone soil.For the zone that hydrology boring or observation well are arranged, can pass through artificial observation phreatic table buried depth, with the accuracy of checking GPR signal decipher.
Claims (1)
1. the assay method of an aerated zone soil and underground latent water hydraulic connection is characterized in that: assay method:
A. adopt ground penetrating radar system, in underground latent water buried depth 10m, adopt 100MHz to 50MHz radar antenna; When diving buried depth during greater than 10m, adopt 50MHz to 25MHz antenna; Be equipped with simultaneously one of portable handhold GPS, one of the tape measure of 30m; According to atural object property settings corresponding instrument parameter: stop the sample frequency and be 512MHz, sampled point apart from being that 1m, stacking fold are 128 times for 1m to 2m, antenna distance;
B. collect search coverage hydrogeological condition, terrain information, the mild ground penetrating radar line of observation of laying is avoided significantly zone of topographic relief continuously, makes radar antenna and ground good contact, and guarantees that as far as possible survey line length is more than 30m; Begin to launch tape measure to the other end from survey line one end, then begin by set point to survey and to utilize simultaneously handhold GPS to record the volume coordinate information of each measuring point, until finish the whole piece survey line apart from detection from the survey line starting point;
C. with the data importing computer that gathers, utilize Reflex specialty analysis software to the radar data of collection in worksite process decipher, with the time deeply change, the radar sectional view that obtains from processing identifies obvious lineups, and definite groundwater level face and the high capillary water zone position in sectional view of top 1m thereof;
D. extract from sectional view near the metastable interval of radar signal amplitude, capillary water zone top, this interval is the hydraulic connection band of discontinuance of underground latent water and aerated zone soil; From thickness, the degree of depth of band of discontinuance, and the distribution degree of variation of top radar amplitude signal can be determined the hydraulic connection situation of underground latent water and aerated zone soil.
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| CN2012103485664A CN102866427A (en) | 2012-09-19 | 2012-09-19 | Method for testing hydraulic connection between unsaturated zone soil and groundwater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106777968A (en) * | 2016-12-14 | 2017-05-31 | 中国水利水电科学研究院 | It is a kind of it is big it is buried under the conditions of surface water supply underground water computational methods and device |
| CN109343125A (en) * | 2018-09-03 | 2019-02-15 | 中国科学院南京土壤研究所 | A kind of red soil key band underground structure space predicting method based on Ground Penetrating Radar |
| CN111175835A (en) * | 2020-01-16 | 2020-05-19 | 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) | Engineering geology detection method |
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| US4738377A (en) * | 1986-09-17 | 1988-04-19 | Demoss Jr John E | Method and apparatus for controlling rate of application of fertilizer |
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| US4738377A (en) * | 1986-09-17 | 1988-04-19 | Demoss Jr John E | Method and apparatus for controlling rate of application of fertilizer |
Non-Patent Citations (2)
| Title |
|---|
| 胡振琪等: "应用探地雷达测定复垦土壤的水分含量", 《河北建筑科技学院学报》, vol. 22, no. 1, 30 March 2005 (2005-03-30) * |
| 雷少刚: "荒漠矿区关键环境要素的监测与采动影响规律研究", 《中国博士学位论文全文数据库》, 31 March 2010 (2010-03-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106777968A (en) * | 2016-12-14 | 2017-05-31 | 中国水利水电科学研究院 | It is a kind of it is big it is buried under the conditions of surface water supply underground water computational methods and device |
| CN109343125A (en) * | 2018-09-03 | 2019-02-15 | 中国科学院南京土壤研究所 | A kind of red soil key band underground structure space predicting method based on Ground Penetrating Radar |
| CN109343125B (en) * | 2018-09-03 | 2020-04-24 | 中国科学院南京土壤研究所 | Red soil key zone underground structure space prediction method based on ground penetrating radar |
| CN111175835A (en) * | 2020-01-16 | 2020-05-19 | 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) | Engineering geology detection method |
| CN111175835B (en) * | 2020-01-16 | 2020-10-16 | 山东省鲁南地质工程勘察院(山东省地勘局第二地质大队) | Engineering geology detection method |
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Application publication date: 20130109 |