Hydraulics & Waterways

Oral

394803 - Revitalization of an urban stream in terms of water quality and recreational usability: assessment of options through hydrologic and hydraulic modeling

Wednesday, June 6
2:00 PM - 3:30 PM
Location: Regency Room
Co-Authors: Daniel Fife, Grand Forks, North Dakota – University of North Dakota; Grant Neuharth, Bismarck, ND – Federal Highway Administration; Jonathan Olson, Grand Forks, ND – City of Grand Forks; Tom Vidmar, Burnsville, MN – WSB & Associates, Inc.

A stream called English Coulee with a catchment area of 347 km^2 passes through the city of Grand Forks in North Dakota before emptying into the Red River of the North. The coulee has a low head dam located in the upper basin area. Midway through the watershed, the coulee is routed into a diversion channel with two entry points that bypass excess flood discharge around the city. The stretch of English Coulee that passes through the city has stagnation of flow, overgrowth of cattails, poor odor, and deposition of debris and generally poor water quality. As of 2016, the entire length of English Coulee had impairments to human recreation and to the health of fish and other aquatic biota. The causes for these impairments were due to high concentrations of selenium, total dissolved solids, E. coli bacteria, siltation, and low concentrations of dissolved oxygen. A design project to restore the coulee was presented as a challenge to a group of students. The project adapted a hydraulic modeling approach which enabled gauging the effectiveness of multiple design options. The coulee basin’s hydrologic runoff and continuous inflow simulation were developed using HEC-HMS. HEC-RAS was used to model the hydraulic influence of the diversion channel, diversion intakes, weirs, bridges, culverts, and urban reaches. Pertinent survey data for existing control structures was collected. Simulations were carried out to evaluate the effectiveness of four design options consisting of structural controls and channel modifications. Modeling runs showed control modification as the more cost effective solution.

Yeo Howe Lim, PhD

Associate Professor, Department of Civil Engineering
University of North Dakota

DR. Yeo Howe Lim is an Associate Professor of Civil Engineering at University of North Dakota. He teaches fluid mechanics and courses in water resources engineeirng. He is currently conducting research in areas of open channel flows, water quality of storm runoffs, and impacts of climate change on water infrastructures.

Presentation(s):

Send Email for Yeo Howe Lim


Assets

394803 - Revitalization of an urban stream in terms of water quality and recreational usability: assessment of options through hydrologic and hydraulic modeling



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Revitalization of an urban stream in terms of water quality and recreational usability: assessment of options through hydrologic and hydraulic modeling