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Method for determining horizontal seepage channel of runoff area by adopting tracing technology

A seepage channel and tracer technology, applied in the field of hydrogeology, can solve the problems of lack of accurate search and uneven development of karst fractures, and achieve the effects of easy understanding, easy data acquisition and time saving.

Active Publication Date: 2019-04-16
UNIV OF JINAN
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Problems solved by technology

Due to the uneven development of karst fractures, there is still a lack of technical methods to accurately find groundwater seepage channels at different depths in rock formations

Method used

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  • Method for determining horizontal seepage channel of runoff area by adopting tracing technology
  • Method for determining horizontal seepage channel of runoff area by adopting tracing technology
  • Method for determining horizontal seepage channel of runoff area by adopting tracing technology

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Experimental program
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specific Embodiment approach

[0115] As a specific implementation, taking the water quality monitoring point J2 as an example, the temperature curve and the conductivity curve of the drawn water quality monitoring point J2 are as follows image 3 and Figure 4 shown.

[0116] 4.3 Calculate the vertical groundwater velocity for a certain water quality monitoring point.

[0117] 4.3.1 Determine the temperature inflection point and conductivity inflection point depth of the water quality monitoring point according to the temperature curve and conductivity curve drawn in step 4.2, and determine the occurrence depth of the horizontal seepage channel at the water quality monitoring point.

[0118] 4.3.2 Calculate the vertical velocity of the groundwater at the depth determined in step 4.3.1.

[0119]For the convenience of understanding, the calculation method of the vertical velocity of groundwater is described in detail by taking J2 as an example.

[0120] Such as image 3 and Figure 4 It can be seen that...

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Abstract

The invention discloses a method for determining a horizontal seepage channel of a runoff area by adopting a tracing technology. According to the method, on the basis of karst region hydrogeology condition understanding, existing hydrogeology observation holes in a region are firstly selected, water level unified measurement is carried out, an underground water flow field is drawn, hydraulic connection among the holes is determined, then a tracing test is arranged, and the horizontal apparent flow velocity in the region is calculated; secondly, a representative drill hole is selected in a targeted manner to carry out long-term monitoring on underground water temperature and conductivity indexes, inflection points of underground water movement in the drill hole are judged, the occurrence depth of a horizontal seepage channel is determined, and the flow velocity of underground water in the drill hole in the vertical direction is calculated; and finally, the difference between flow velocities in the vertical direction and the horizontal direction is comprehensively analyzed to determine a seepage channel. The invention provides scientific basis and decision support for karst water system protection and karst water resource management.

Description

technical field [0001] The invention relates to the technical field of hydrogeology, in particular to a method for determining the horizontal seepage channel of a karst water system by using a tracer technique. Background technique [0002] The heterogeneity of karst groundwater has caused great harm to the development of water sources, the prevention and control of karst water pollution, engineering construction and mining safety production. Due to the uneven development of karst fractures, there is still a lack of technical methods to accurately find groundwater seepage channels at different depths in rock formations. Therefore, judging and accurately determining the location of seepage channels in karst areas has become one of the difficult issues in the field of karst water science and engineering research at home and abroad. Contents of the invention [0003] In view of the above problems, the present invention provides a method for determining the horizontal seepage...

Claims

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Application Information

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IPC IPC(8): G01V5/00
CPCG01V5/00
Inventor 邢立亭迟光耀邢学睿李常锁邢学韬相华赵振华
Owner UNIV OF JINAN
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