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Rapid judgment method for hydraulic connection among aquifers

A connection and hydraulic technology, applied in water resources assessment, electric/magnetic exploration, acoustic re-radiation, 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: 2019-07-09
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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  • Rapid judgment method for hydraulic connection among aquifers
  • Rapid judgment method for hydraulic connection among aquifers
  • Rapid judgment method for hydraulic connection among 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

The invention discloses a rapid judgment method for hydraulic connection among aquifers. Specifically, the method comprises the steps of laying out profile points in a study area according to designedmeasurement lines through adoption of a time shift transient electromagnetic depth measurement technology before a water pumping test is carried out, and measuring a transient electromagnetic signalon each measurement coordinate of a profile, thereby obtaining groundwater distribution electromagnetic response characteristics before groundwater migration condition is changed; laying out a water pumping hole and an observation hole, observing a groundwater level initial value, carrying out the water pumping test in the water pumping hole, and recording water levels in the water pumping hole and the observation hole; carrying out detection through reusing of a time shift transient electromagnetic method, thereby obtaining the groundwater distribution electromagnetic response characteristicsafter the groundwater migration condition is changed; and finally, carrying out difference analysis of the two times of groundwater distribution electromagnetic response characteristics, taking the water levels in the water pumping hole and the observation hole as constraint conditions, correcting a data processing result, establishing a groundwater migration three-dimensional model in the studyarea, and intuitively judging a replenishment relationship among the 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 Applications(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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