Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and construction method of variable-permeability underground curtain

A seawater intrusion and construction method technology, which is applied in sea area engineering, water conservancy engineering, infrastructure engineering, etc., can solve the problems affecting the development and utilization of groundwater, the inability to discharge salt water, and the accumulation of pollutants, so as to improve the quality of underground freshwater resources and improve Availability, effects of increasing excretory flux

Active Publication Date: 2022-03-25
OCEAN UNIV OF CHINA
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sunken underground curtain will cause a large amount of salt water residue in the upstream groundwater source, which will affect the development and utilization of groundwater; the upper-hanging underground curtain will fail when the seawater level is higher than the freshwater level; the full-section underground curtain will block the underground freshwater flow. Oceanic discharge, which causes a large accumulation of pollutants in the upstream groundwater source and makes it impossible to discharge the large amount of salt water remaining in the aquifer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and construction method of variable-permeability underground curtain
  • Variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and construction method of variable-permeability underground curtain
  • Variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and construction method of variable-permeability underground curtain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Nitrate was selected as the pollutant in a subsurface seawater intrusion area near the ocean at the southern end of the Dagu River Basin in Qingdao City. The total length of the underground aquifer in the study area is 500m, the depth is 50m below sea level, and the bottom boundary of the aquifer is impermeable. The permeability coefficient of the aquifer is 25m / d, the porosity is 0.3, the distance between the underground curtain and the seawater boundary is 50m, the thickness of the wall is 1m, the groundwater level in the aquifer is 1.5m higher than the sea level, and the height of the variable permeability underground curtain is 51.5m , the distance from the nitrate-polluted infiltration zone to the seawater boundary is 200m, the length of the infiltration zone is 270m, the infiltration rate is constant at 1mm / d, and the nitrate concentration is 100mg / L.

[0055] Combined with the hydrological parameters of an underground seawater intrusion area near the ocean at the...

Embodiment 2

[0065] Except that "in the simulation process, the height h1 of the upper water-resisting wall in the variable-permeability underground curtain is set to 20m, and the corresponding value of h1:h2 is 0.63; the permeability coefficient of the lower permeable wall is the permeability coefficient k of the surrounding aquifer respectively. 1 times (the same as the surrounding aquifer medium, equivalent to the underground curtain with only top suspension), 1 / 2 times, 1 / 4 times, 1 / 8 times, 1 / 16 times, 1 / 32 times, 1 / 64 times For the retracement rate of the saltwater wedge when doubled, see the attached image 3 , the enrichment rate of pollutants is shown in the attached Figure 4 " except, other conditions are identical with embodiment 1.

Embodiment 3

[0067] Except that "in the simulation process, the height h1 of the upper water-resistant wall in the variable-permeability underground curtain is set to 25m, and the corresponding value of h1:h2 is 0.94; the permeability coefficient of the lower permeable wall is the permeability coefficient k of the surrounding aquifer respectively. 1 times (the same as the surrounding aquifer medium, equivalent to the underground curtain with only top suspension), 1 / 2 times, 1 / 4 times, 1 / 8 times, 1 / 16 times, 1 / 32 times, 1 / 64 times For the retracement rate of the saltwater wedge when doubled, see the attached image 3 , the enrichment rate of pollutants is shown in the attached Figure 4 " except, other conditions are identical with embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and a construction method thereof, and the construction method comprises the following steps: determining a related area according to hydrogeological conditions of a coastal area; according to the seawater intrusion range, the position, 1 / 3 away from the coastline, of seawater intrusion serves as the variable-permeability underground curtain construction position; the upper portion of the variable-permeability underground curtain is of a waterproof wall structure, and the lower portion of the variable-permeability underground curtain is of a permeable wall structure. According to the technical scheme, seawater invasion can be prevented and controlled, and the underground fresh water resource quantity is increased; meanwhile, pollutant enrichment of an upstream underground water source is reduced, so that the quality of underground water in a coastal area is improved, and the discharge flux of underground fresh water is increased.

Description

technical field [0001] The invention relates to the technical field of prevention and control of seawater intrusion, in particular to a variable-permeability underground curtain for preventing seawater intrusion and land-source pollution and a construction method thereof. Background technique [0002] In recent years, due to climate change, rising sea level and excessive exploitation of groundwater in coastal areas, the groundwater table has continued to decline, and the intrusion of seawater into inland aquifers has become increasingly serious, resulting in groundwater salinization and soil salinization in coastal areas. On the other hand, with the rapid development of industry and agriculture, the increase of population, and the acceleration of urbanization, the problem of groundwater pollution is becoming more and more serious. Therefore, research and development of seawater intrusion control and groundwater pollution prevention and control technologies are of great impor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E02D19/06E02D19/18E02D31/00E02B3/16
CPCE02D19/06E02D19/18E02D31/004E02B3/16E02D2300/002E02D2300/0037
Inventor 郑天元高晨晨常钦鹏孙柒国郑西来
Owner OCEAN UNIV OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com