Mr. Sutherland is a principal water resources engineer with over 53 years of professional engineering experience in watershed/stormwater management planning, water quality planning and BMP design, urban hydrology, stormwater pollutant load estimation and BMP modeling, riverine hydraulics, and floodplain mapping. He is a recognized international expert in urban stormwater load modeling and in the use of street-sweeping and catch-basin cleaning practices to remove pollutants from urban runoff. He is also the principal author of a state-of-the-art urban stormwater quality modeling package called SIMPTM, which has been used on numerous projects. In the 1990s, the USGS recognized the model as the most accurate stormwater quality modeling package in the country. Mr. Sutherland is the author of over 50 publications, primarily on stormwater quality modeling and the pollutant-reduction benefits of cleaning practices. Many of these publications can be found at WorldSweeper.com, and a selection of the best and most impactful publications can be found at ResearchGate.com.