DOI QR코드

DOI QR Code

Sanitary sewer flow characteristics through a depth-velocity scatter graph analysis

수위-유속 분산 그래프를 통한 하수흐름 특성 분석

  • Son, Jooyoung (Department of Civil and Environmental Engineering, Urban Design and studies, Chung-Ang University) ;
  • Oh, Jeill (Department of Civil and Environmental Engineering, Urban Design and studies, Chung-Ang University)
  • 손주영 (중앙대학교 사회기반시스템공학부) ;
  • 오재일 (중앙대학교 사회기반시스템공학부)
  • Received : 2014.10.08
  • Accepted : 2014.12.08
  • Published : 2014.12.15

Abstract

To perform long-term sewer monitoring, It is important to understand the nature of the wastewater flow that occurs at the point on early stage of the monitor and to prevent in advance a problem which may caused. We can infer the flow properties and external factors by analyzing the scatter graph obtained from the measured data flow rate monitoring data since an field external factor affecting the sewage flow is reflected in the flow rate monitoring data. In this study, Selecting the three points having various external factors, and we Inferred the sewer flow characteristics from depth-velocity scatter graph and determined the analysis equation for the dry-weather flow rate data. At the'point 1' expected non-pressure flow, we were able to see the drawdown effect caused by the free fall in the manhole section. At the'point 2', existed weir and sediments, there was backwater effect caused by them, and each of size calculated from the scatter graph analysis were 400 mm and 130 mm. At the'Point 3', there is specific flow pattern that is coming from flood wave propagation generated by the pump station at upstream. In common, adequate equations to explain the dry weather flow data are flume equation and modified manning equation(SS method), and the equations had compatibility for explaining the data because all of $R^2$ values are over 0.95.

Keywords

References

  1. Butler, D. and J. Davies (2004). Urban drainage, pp.163-164 CRC Press.
  2. Chapra , S. C. (2012). Applied numerical methods. McGraw Hill, New York.
  3. Enfinger, K. L. and H. R. Kimbrough (2004). Scattergraph Principles and Practice: A Comparison of Various Applications of the Manning Equation. Proceedings of the Pipeline Division Specialty Conference.
  4. Lanfear, K. J. and J. J. Coll (1978). Modifying Manning's Equation for Flow Rate Estimates. Water and Sewage Works 125(3).
  5. Ludwig, R. G. and J. D. Parkhurst (1974). Simplified application of Palmer-Bowlus flow meters. Journal (Water Pollution Control Federation): 2764-2769.
  6. Ministry of environment (2008). Standard manual for estimating sewer I/I(infiltration and inflow)
  7. Ministry of environment (2009). Sewer flowmeter Installation and Maintenance manual
  8. Stevens, P. L. and K. L. Enfinger (2007). Scattergraph Principles and Practice: Characterization of Sanitary Sewer and Combined Sewer Overflows. Pipelines 2007: 1-15.
  9. Stevens, P. L. and H. M. Sands (1995). Sanitary Sewer Overflows Leave Telltale Signs in Depth-Velocity Scattergraphs. Seminar Publication, Citeseer.
  10. Stevens, P. L. and J. S. Schutzbach (1998). New Diagnostic Tools Improve the Accuracy of the Manning Equation. Proceedings of the Water Environment Federation Technical Exhibition and Conference.