Category: Stormwater Symposium

394247 - Flood damage reduction in urban areas with use of low impact development designs

Monday, Jun 4
8:30 AM – 5:30 PM

Urbanization and land development in Ellicott City, Maryland has led to flooding twice in the past five years. Flooding, resulting from the Patapsco River catchment area and excess precipitation, has been devastating to this east coast town. Low impact development (LID) designs in urban storm water drainage can lower peak discharges during flood events. LID practices consist of material and construction designs such as permeable pavements for parking lots and sidewalks, green rooftops, rain gardens, retention cisterns, and natural rehabilitation. This study utilizes Environmental Protection Agency Storm Water Management Modeling (EPA SWMM) software to model the catchment area while implementing LID land areas. SWMM is capable of implementing LID practices such as permeable pavements and grass ways in the existing landscape in the catchment area. Watershed was delineated with the aid of Geographic Information Systems and Soil and Water Assessment Tool. United States Geological Survey river gauge station provided stream discharge information needed for flow volume estimates. National Oceanic and Atmospheric Administration precipitation records for different storm events were routed through the catchment area for peak flood scenarios. Existing land use and implementation of LID scenarios were compared resulting in an EPA SWMM prediction of flood reduction of 5.4% and 7.5% with the use of green roofs and permeable pavements, respectively for the considered storm event. This study showed LID designs have the potential to reduce flood peak, resulting in economic and social benefits.

Swastik Bhandari

Graduate Student
Southern Illinois University Carbondale
Carbondale, Illinois

Addison Jobe

Graduate Student
Southern Illinois University Carbondale
Carbondale, Illinois

Balbhadra Thakur

Graduate Student
Southern Illinois University Carbondale
Carbondale, Illinois

I am a Graduate student in the Department of Civil and Environmental Engineering at Southern Illinois University Carbondale. I have completed my undergrad in Civil Engineering from Institute of Engineering, Pulchowk Nepal. My areas of interest are GIS, Hydroclimatology, Forecasting, Hydraulics, and Hydrology. I am looking foreward to be a prospective member in water resource community.

Ajay Kalra

Assistant Professor
Southern Illinois University Carbondale
Carbondale, Illinois

Dr. Ajay Kalra is an Assistant Professor in the Department of Civil & Environmental Engineering at Southern Illinois University, Carbondale. He holds a Ph.D. from University of Nevada Las Vegas, M.S. from Utah State University, and B.E. from Punjab Engineering College, India in Civil and Environmental Engineering with focus on Water Resources Engineering. Dr. Kalra has 3 years of postdoctoral experience working with Desert Research Institute and US EPA. In addition to research, Dr. Kalra has 5 years of consulting experience working as a water resources engineer in Nevada. Dr. Kalra’s research interests are interdisciplinary in the area of hydro-climatology, urban sustainability, artificial intelligence, water resources management, and probabilistic forecasting and downscaling.

Sajjad Ahmad

Professor
University of Nevada Las Vegas
Las Vegas, Nevada

Dr. Sajjad Ahmad is a Professor in the Department of Civil and Environmental Engineering and Constructions at University of Nevada, Las Vegas. His current research interests are in evaluating the impact of climate variability and change on hydrologic cycle, water-energy nexus, probalistic forecasting and downscaling, and integrated water resources management.