Key figures and dates in the history of the scattergraph are provided below:
First known scattegraph of depth and velocity data published by Elgin R. Wilcox. Data was obtained during laboratory testing to compare the flow of water in concrete and vitrified clay pipes.
Wilcox, E.R. (1924). A Comparative Test of the Flow of Water in 8-inch Concrete and Vitrified Clay Sewer Pipe, University of Washington Engineering Experiment Station, Bulletin 27.
Foundations of the Lanfear-Coll Method published by Kenneth Lanfear and John Coll.
Lanfear, K.J. and Coll, J.J. (March 1978). "Modifying Manning's Equation for Flow Rate Estimates," Water and Sewage Works, 68-69.
First generation scattergraph using data from electronic flow monitoring equipment developed and published by the Water Research Centre in Great Britain. Q-Curves developed by David Butler for use on Butler-Pinkerton Charts, an enhanced version of the hydraulic elements curves.
Water Research Centre (1987). A Guide to Short Term Flow Surveys of Sewer Systems, WRc Engineering, Wiltshire, England.
Butler, D. and Pinkerton, B.R.C. (1987). Gravity Flow Pipe Design Charts, Thomas Telford, London.
Second generation scattergraph developed by Patrick Stevens at ADS Environmental Services.
Peter Keefe proposed the concurrent use of the Manning Equation, flow monitoring data, and independent field confirmations to evaluate and interpret flow monitoring data.
Scattergraph used to identify the tell-tale signature of a sanitary sewer overflow (SSO).
Stevens, P.L. and Sands, H.M. (1995). "SSOs Leave Telltale Signs in Deph-Velocity Scattergraphs," Seminar Publication - National Conference on Sanitary Sewer Overflows, United States Environmental Protection Agency, EPA/625/R-96/007; Washington, D.C.
The Scattergraph Poster (Version 1) is born. Released by Patrick Stevens on October 11, 1996.
Stevens-Schutzbach Method developed and published by Patrick Stevens and Jim Schutzbach.
Stevens, P.L. and Schutzbach, J.S. (1998). "New Diagnostic Tools Improve the Accuracy of the Manning Equation," Proceedings of the Water Environment Federation Technological Exposition and Conference, Orlando, FL. Water Environment Federation: Alexandria, VA.
Iso-Q lines independently developed by Burt Curry.
The Scattergraph Poster (Version 2) is updated. Released by Patrick Stevens as the Spring Equinox Edition.
The Scattergraph Poster (Version 3) is updated. Released by Patrick Stevens as the Millenium Edition.
iso-Froude line developed by David Butler and added to Butler-Pinkerton Charts.
Butler, D. and Davies, J.W. (2000). Urban Drainage, E & FN Spon, London.
The Scattergraph Poster (Version 4) is updated. Released by Patrick Stevens as the Independence Day Edition.
Third generation scattergraph developed by Kevin Enfinger at ADS Environmental Services.
The Scattergraph Poster (Version 5) is updated. Released by Patrick Stevens and Kevin Enfinger.