Peer-Reviewed Journal Articles


Hawley R.J. and MacMannis, K.R. 2019. Tree roots as a dominant agent of streambed habitat, profile pattern, and grade control. Geomorphology, 343: 81-91. Open Access »


Hawley R.J.  2018.  Making stream restoration more sustainable: A geomorphically, ecologically, and socioeconomically principled approach to bridge the practice with the science. BioScience, 68(7): 517-528. Open Access »

Sengupta, A., Hawley, R.J., and Stein, E.D.  2018.  Predicting hydromodification in streams using nonlinear memory-based algorithms in southern California streams. Journal of Water Resources Planning and Management, 144(1): 04017079. Read article »


Hawley R.J., Goodrich, J.A., Korth, N.L., Rust, C.J., Fet, E.V., Frye, C., MacMannis, K.R., Wooten, M.S., Jacobs, M., and Sinha, R. 2017. Detention outlet retrofit device improves the functionality of existing detention basins by reducing erosive flows in receiving channels. Journal of the American Water Resources Association, 53(5): 1032-1047. Read article »


Hawley R.J. and G.J. Vietz. 2016. Addressing the urban stream disturbance regime. Freshwater Science, 35(1): 278-292. Read article »

Hawley R.J., Wooten, M.S., MacMannis, K.R., and E.V. Fet. 2016. When do macroinvertebrate communities of reference streams resemble urban streams? The biological relevance of Q critical. Freshwater Science, 35(3): 778-794. Read article »

Smith, R.F., Hawley, R.J., Neale, M.W., Vietz, G.J., Diaz-Pascacio, E., Herrmann, J., Lovell, A.C., Prescott, C., Rios-Touma, B., Smith, B. and R.M. Utz. 2016. Urban stream renovation: incorporating societal objectives to achieve ecological improvements. Freshwater Science, 35(1): 364-379. Read article »

Utz, R.M., Hopkins, K., Beesley, L., Booth, D., Hawley, R.J., Baker, M., Freeman, M.C., and K. Jones. 2016. Ecological resistance in urban streams: the role of natural and legacy attributes. Freshwater Science, 35(1): 380-397. Read article »


Hawley, R.J. and B.P. Bledsoe. 2013. Channel enlargement in semi-arid suburbanizing watersheds: A Southern California case study. Journal of Hydrology, 496: 17-30. 
Read article »

Hawley R.J., MacMannis, K.R., and M.S. Wooten. 2013. Bed coarsening, riffle shortening, and channel enlargement in urbanizing watersheds, northern Kentucky, USA. Geomorphology, 201: 111-126. Read article »


Bledsoe, B.P., Stein, E.D., Hawley, R.J., and D.B. Booth. 2012. Framework and tool for rapid assessment of stream susceptibility to hydromodification. Journal of the American Water Resources Association, 48(4): 788-808. Read article »

Hawley, R.J., Bledsoe, B.P., Stein, E.D., and B.E. Haines. 2012. Channel evolution model of semiarid stream response to urban-induced hydromodification. Journal of the American Water Resources Association., 48(4): 722-744. Read article »

Hawley, R.J., Wooten, M.S., Vatter, B.C., Onderak, E., Lachniet, M .J., Schade, T., Grant, G., Groh, B., and J. DelVerne. 2012. Integrating stormwater controls designed for channel protection, water quality, and inflow/infiltration mitigation in two pilot watersheds to restore a more natural flow regime in urban streams. Watershed Science Bulletin, 3(1), 25-37. Read article »


Hawley, R.J. and B.P. Bledsoe. 2011. How do flow peaks and durations change in suburbanizing semi-arid watersheds? A southern California case study. Journal of Hydrology, 405 (1-2), 69-82. Read article »

Book Chapters


Vietz, G.J. and R.J. Hawley. 2019. Protecting and Managing Stream Morphology in Urban Catchments Using WSUD. In Approaches to Water Sensitive Urban Design, A. Sharma, D. Begbie, and T. Gardner (Eds). Elsevier, pp. 249-267. Read article »



Hawley, R.J., Goodrich J.A., and MacMannis, K.R. 2019. Detain H2O – Detention Pond Retrofit Device. U.S. Patent Number 10,316,506. Patent Issued June 11, 2019. Read more »


Gibson, J.P. 2014. Testimony submitted to the United States Senate, Environment and Public Works Committee, Water and Wildlife Subcommittee. Hearing entitled, "Solving the Problem of Polluted Transportation Infrastructure Stormwater Runoff." May 13, 2014. 
See full testimony and video archive »

Sustainable Streams' client serves as an invited witness to US Senate Hearing on Stormwater Runoff. See written testimony from Mr. James P. Gibson, Jr. of SD1 or  watch the full video archive .

Sustainable Streams' client serves as an invited witness to US Senate Hearing on Stormwater Runoff. See written testimony from Mr. James P. Gibson, Jr. of SD1 or watch the full video archive.

Industry Media and News

SD1 bringing innovative approach to region’s growing erosion problem; protecting public health. Northern Kentucky Tribune, July 18, 2018. Read article »

Hawley, R., Lyons, J., Wolnitzek, G., and Lodor, M. 2015. Stream daylighting – A viable CSO mitigation strategy. World Water: Stormwater Management. Water Environment Federation, April/May 2015, p. 17-19. Read article »

WEF. 2012. Stream-channel Protection Requires Focus on more than Flow Magnitude. The Stormwater Report. Newsletter of the Water Environment Federation (WEF), 2(8). Read article »

Hawley, R.J. 2012. New Stormwater Regulations: 'Channel Protection Controls' — What Are They and What Do They Mean?Stream Lines. Newsletter of the KY-TN Water Environment Association, Spring/Summer 2012, p. 28-30. Read article »