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Test Study on Physical Clogging of Aquifer During the Restoration of Saline Water Mass(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第04期
Page:
68-73
Research Field:
水资源与环境
Publishing date:

Info

Title:
Test Study on Physical Clogging of Aquifer During the Restoration of Saline Water Mass
Author(s):
ZHANG Shu-hui1;  ZHENG Xi-lai1; 2;  SHAN Bei-bei1;  LIU Yu-hong1
1. School of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, Shandong, China; 2. Key Laboratory of Marine Environment and Ecology of Ministry of Education, Ocean University of China, Qingdao 266100, Shandong, China
Keywords:
aquifer;  saline water mass;  restoration;  physical clogging;  suspended matter;  permeability coefficient;  particle size;  Shandong Peninsula
PACS:
P641.2; P342+.4
DOI:
-
Abstract:
In order to solve the physical clogging problem of aquifer in Dagu River downstream during the restoration of saline water mass, effect of mass concentration and particle size of suspended matter on the physical clogging of aquifer in saline water mass was systematically studied with field simulated test; the temporal and spatial variations of permeability coefficient during the artificial recharge were measured to evaluate the degree and mechanism of physical clogging quantificationally. The results showed that mass concentration and particle size of suspended matter were the key factors for penetrability of aquifer; when the mass concentrations of suspended matter were 50, 100, 200 mg·L-1, the equivalent permeability coefficients of aquifer were 10%, 20% and 38% of the initial value, respectively; the relative permeability coefficient decreased gradually with the increase of recharge time and mass concentration of suspended matter and the decrease of infiltration depth; the smaller the particle size of suspended matter was, the longer the migration distance was, the larger the thickness of area with permeability coefficient descending was; with the increase of particle size of suspended matter, the suspended matter was easily intercepted by the surface layer of sand column, so that the decrease amplitude of permeability coefficient of surface layer increased, and the decrease amplitude of other layers decreased with the increase of depth.

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Last Update: 2012-12-20