Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Erosion behavior according to location of conduit cracks in agricultural reservoir

  • Ryu, Jung-Hyun (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Heo, Joon (Rural Research Institute, Korea Rural Community Corporation) ;
  • Shim, Jae-Woong (Rural Research Institute, Korea Rural Community Corporation) ;
  • Kim, Cheol-Han (Hyundai City Corporation) ;
  • Yun, Bora (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Lee, Yong-Hak (Institute of Agricultural Science, Chungnam National University) ;
  • Lee, Dal-Won (Department of Agricultural and Rural Engineering, Chungnam National University)
  • Received : 2020.10.23
  • Accepted : 2020.11.30
  • Published : 2020.12.01
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Abstract

The conduits of agricultural reservoirs undergo deterioration over a considerable period of time and this is highly likely to cause structural problems such as cracks. It is therefore important to consider the effects of structural defects on the body from the viewpoint of stability and maintenance of the embankment. In this study, basic data on the effects of the crack location on the stability of the embankment is obtained by identifying, comparing, and analyzing the erosion characteristics and pore water pressure behavior through a large-scale model experiment that involves classifying the location of the conduit cracks. From the results of the experiment, it was confirmed that when a crack occurred, the amount of leakage increased as the location of the crack portion was closer to the water level, and the internal erosion phenomenon accelerated, thereby increasing the possibility of piping. It was also found that an upstream conduit crack affects the erosion and water pressure change of the central and downstream conduit of the embankment, and the conduit crack has a very large effect on the pore water pressure despite the low upstream water level. Therefore, the seepage behavior of the embankment for each conduit crack identified in this study is considered to be useful basic data for preparing a repair and reinforcement plan according to the crack location in the future.

Keywords

Acknowledgement

이 연구는 한국연구재단(과제번호: 2019R1I1A3A01058517 및 2019R1C1C1007100) 및 농림축산식품부의 재원으로 농림식품기술기획평가원의 농업기반 및 재해대응 기술개발 사업(320002-01)의 지원을 받아 연구되었음.

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