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The Prediction Methods for Potential Suspended Solids Clogging Types during Managed Aquifer Recharge

Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
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Water 2014, 6(4), 961-975; https://doi.org/10.3390/w6040961
Received: 17 February 2014 / Revised: 24 March 2014 / Accepted: 11 April 2014 / Published: 22 April 2014
The implementation and development of managed aquifer recharge (MAR) have been limited by the clogging attributed to physical, chemical, and biological reactions. In application field of MAR, physical clogging is usually the dominant type. Although numerous studies on the physical clogging mechanism during MAR are available, studies on the more detailed suspended clogging types and its prediction methods still remain few. In this study, a series of column experiments were inducted to show the process of suspended solids clogging process. The suspended solids clogging was divided into three types of surface clogging, inner clogging and mixed clogging based on the different clogging characteristics. Surface clogging indicates that the suspended solids are intercepted by the medium surface when suspended solids grain diameter is larger than pore diameter of infiltration medium. Inner clogging indicates that the suspended solids particles could transport through the infiltration medium. Mixed clogging refers to the comprehensive performance of surface clogging and inner clogging. Each suspended solids clogging type has the different clogging position, different changing laws of hydraulic conductivity and different deposition profile of suspended solids. Based on the experiment data, the ratio of effective medium pore diameter (Dp) and median grain size of suspended solids (d50) was proposed as the judgment index for suspended solids clogging types. Surface clogging occurred while Dp/d50 was less than 5.5, inner clogging occurred while Dp/d50 was greater than 180, and mixed clogging occurred while Dp/d50 was between 5.5 and 180. In order to improve the judgment accuracy and applicability, Bayesian method, which considered more ratios of medium pore diameter (Dp) and different level of grain diameter of suspended solids (di), were developed to predict the potential suspended solids types. View Full-Text
Keywords: managed aquifer recharge; suspended solids; physical clogging managed aquifer recharge; suspended solids; physical clogging
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Du, X.; Fang, Y.; Wang, Z.; Hou, J.; Ye, X. The Prediction Methods for Potential Suspended Solids Clogging Types during Managed Aquifer Recharge. Water 2014, 6, 961-975.

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