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A Quick Judgment Method of Hydraulic Connection Between Aquifers

A water layer and connection technology, which is applied in water resources assessment, electric/magnetic exploration, acoustic reradiation, etc., can solve problems such as troublesome hydraulic connection of aquifers, achieve shortened production cycle, save cost, and fine three-dimensional data profile Effect

Inactive Publication Date: 2021-02-09
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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Problems solved by technology

The hydrochemical characteristics of groundwater can reflect the hydrogeological environment of the groundwater to a certain extent, but the hydrochemical composition of the same aquifer may be larger at different locations and at different times, so it is necessary to distinguish the hydraulic connection between aquifers in areas with large lithological changes caused a lot of trouble

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  • A Quick Judgment Method of Hydraulic Connection Between Aquifers
  • A Quick Judgment Method of Hydraulic Connection Between Aquifers
  • A Quick Judgment Method of Hydraulic Connection Between Aquifers

Examples

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Embodiment 1

[0049] Embodiment 1, take the hydrogeological survey test of a certain mining area in Inner Mongolia as an example, according to Figure 5 The method steps of the invention illustrate the application method and effect of this patent.

[0050] 1) First analyze the hydrogeological conditions of the study area to determine the characteristics of the aquifer to be studied.

[0051] The marker layer in this area is the 15-1 coal seam, which is located in the upper part of the Carboniferous Yimin Formation coal measure strata and develops steadily and continuously. According to stratum age, lithology, rock porosity, physical characteristics of groundwater and location of marker layers, the aquifers in the area are divided from top to bottom into Quaternary pore phreatic aquifer, 15-1 coal roof composite aquifer and The 15-1 coal floor composite aquifer, this study did not consider the 15-1 coal floor composite aquifer. The coal seams in the area have small water content and poor w...

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Abstract

A method for quickly judging the hydraulic connection between aquifers, which specifically includes: firstly, before the pumping test, using time-shifting transient electromagnetic sounding technology in the research area, laying out profile points according to the designed survey line, and measuring Transient electromagnetic signal measurement is carried out on the coordinates to obtain the electromagnetic response characteristics of the groundwater distribution before the groundwater migration situation changes; the pumping hole and the observation hole are arranged to observe the initial value of the groundwater level, and then the pumping test is carried out in the pumping hole, and the pumping hole and the observation hole are respectively recorded. Observe the water level in the hole; then use the time-lapse transient electromagnetic method to detect again, and obtain the electromagnetic response characteristics of the groundwater distribution after the groundwater migration changes; finally, through the difference analysis of the two electromagnetic response characteristics, and use the pumping hole and observation The water level in the hole is used as a constraint to correct the results of data processing, establish a three-dimensional model of groundwater migration in the study area, and intuitively judge the recharge relationship between aquifers.

Description

technical field [0001] The invention belongs to the technical field of hydrogeological analysis, and specifically relates to a method for realizing rapid three-dimensional visualization judgment of groundwater migration law by adopting the idea of ​​combining geophysical time-shifting transient electromagnetic method and pumping test. Background technique [0002] In recent years, problems such as saline water intrusion into freshwater aquifers, prediction of sources of groundwater pollutants, and detection of coal mine water hazards have been the focus of attention of experts from various countries. Therefore, it is of great guiding significance for disaster management and environmental protection to accurately determine the distribution and migration of groundwater bodies and provide clear and intuitive three-dimensional hydrogeological information. [0003] In order to understand the migration law of groundwater and the hydraulic relationship between aquifers, conventiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/08
CPCG01V3/08Y02A90/30
Inventor 陈康黄昊张军燕薛国强郝巨涛岳跃真秦明豪
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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