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http://dx.doi.org/10.7843/kgs.2015.31.1.53

Characteristics of Drainage Pervious Block Considering Urban Rainfall  

Seo, Da-Wa (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Yun, Tae-Sup (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Youm, Kwang-Soo (GS E&C Infra-Structure Team, Technical Division)
Jeong, Sang-Seom (Dept. of Civil and Environmental Engrg., Yonsei Univ.)
Mun, Sung-Ho (Dept. of Construction & Civil Engrg., Seoul National Univ. of Science and Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.1, 2015 , pp. 53-64 More about this Journal
Abstract
This study presents the experimental results of pervious blocks subjected to a series of unique inflow conditions in urban area. The measured properties include the strength, permeability, drainage capacity and runoff, and evaporation for blocks made of two different size of aggregates. Results revealed that the strength satisfies the Korean Standard regardless of aggregate size whereas the immediate runoff occurred for the block with small size aggregate. On the other hand, the block with large aggregates allowed the drainage upon the initial inflow condition, which became hampered to induce the runoff by subsequent inflow. It was attributed to the fact that the capillary water often served as the hydraulic barrier in partially saturated condition. The salient observation indicated that the runoff highly depended on the evaporation and pre-wetting condition as well as the porosity and pore connectivity. The bilinear evaporate rate that makes the degree of saturation vary also had great influence on deterining the time-dependent runoff.
Keywords
Drainage; Pervious block; Permeability; Runoff;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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