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Case Studies

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Assessment of Flood Mitigation Strategies for the City of Kalona, IA

David Koser, now with Strand Associates in Madison, Wisconsin, shares his Thesis on flood mitigation strategies for the City of Kalona, IA. In order to reduce flooding, communities often try to control runoff with a storm sewer network, detention basins, low impact developments, and upstream storage to reduce stream overflow. Numerical models can help predict the effect these strategies will have before expensive construction projects are underway. A coupled 1D/2D hydraulic model using XPSWMM was created for the town of Kalona, IA, to test different strategies for flood reduction.

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A Review on Stormwater Harvesting

This research aims to critically review and discuss all the aspects of stormwater harvesting and reuse such as available guidelines of stormwater harvesting and reuse, public acceptance of water reuse, the scopes and recommendation for future studies. In addition to these, this paper identifies, understand and address the importance of modern technologies capable of proper management of stormwater harvesting and reuse.

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Comparison of Hydrograph Routing Techniques in XPSTORM

A variety of routing techniques are available to develop surface runoff hydrographs from rainfall. The selection of runoff routing method is very vital as it is directly related to the type of watershed and the required degree of accuracy. There are different modelling softwares available to explore the rainfall-runoff process in urban areas. xpstorm, a link-node based, integrated stormwater modelling software, has been used in this study for developing surface runoff hydrograph for a Golf course area located in Rockhampton in Central Queensland in Australia.

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Master Plan of Drainage for Redlands

A Model Solution - Using advanced storm drain modeling techniques to identify historical flooding issues. This case study outlines the importance of considering upstream and downstream variables in complex flooding problems. by Thomas J. Ryan, P.E. RBF a Michael Baker Company Published by Storm Water solutions Magazine

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North Glasgow Integrated Water Management Strategy

The Metropolitan Glasgow Strategic Drainage Partnership (MGSDP) commissioned AECOM to undertake a feasibility study investigating whether or not the Forth and Clyde canal should take surface water from North Glasgow as a means to supporting regeneration and development aspirations.

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Greenstreets@Counters Creek SuDs Retrofit Pilot Study

AECOM is leading Greenstreets@Counters Creek, a pilot study retrofitting a number of sustainable drainage systems (SuDs) into a range of streetscapes and communities in Central London.

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Green Streets@Haringey Retrofitting SuDS Study

AECOM was commissioned by the Greater London Authority (GLA) to produce a pilot Sustainable Drainage Systems (SuDS) retrofitting study. This was to include conceptual retrofit sustainable drainage designs for one of two existing communities currently at risk of flooding.

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Complex Floodplain Issues in Billings, MT

In 1937, a major flood of Yellowstone River tributaries devastated Billings, Montana. Despite the vulnerability of the community that this event revealed, the floodplain was not accurately delineated for decades. The reason for this delay in mapping was due to two factors: 1) lack of available funding and 2) exceedingly complex flow patterns in the developed floodplain. This Case Study was provided by Dan March, P.E., at PBS&J

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Hydrodynamic Modeling of SuDS (BMPs or LIDs) schemes.

This case study highlighted how innovative drainage design can provide synergy between cost-efficiency and floodwater management. The design maximises the integration of drainage infrastructure with in the urban landscape producing an innovative, cost effective intervention in the water cycle. Sara Perales (PMEnginyeria); Peter Coombs (XP Solutions)

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Modelling the Thatcham Flood

This case study looks at the Thatcham floods that devastated a community in the south of England and caused massive destruction of property. It examines the causes and the solutions and the way the MicroDrainage software helped give insight into how to prevent it reoccurring. Aidan Millerick, FICE, FCIWEM

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Delta Drainage & Irrigation

Delta, British Columbia is located in the Fraser River delta on the shores of the Pacific Ocean, just south of the City of Vancouver. Delta comprises mostly agricultural land, with typical ground elevations near sea level. Levees protect the area from potential floods from the Fraser River and tidal surges from the Pacific Ocean. Case Study by Gabor Vasarhelyi, P.Eng., P.E., of GMV Engineering

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Glen Eira, Victoria

Flooding on urban basins is intensifying due to rapid urbanization. Flooding primarily occurs because of drainage congestion of inland flow and/or over bank flow of rivers during severe rainfall events. Rapid urbanization is causing a major change in rainfall-runoff phenomenon and the drainage system as well. The overland flow pattern is becoming complex due to huge structural development, and therefore, the correct prediction of surface runoff is becoming a challenging issue.

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King's Beach Watershed Improvement

Modeling BMPs in Sensitive Areas with XPSWMM, a runoff treatment project at King's Beach in Lake Tahoe. Written by Paul Wisheropp, P.E. Andrea Manha, P.E. Cardno Entrix, Sacramento, CA

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Harris Gully Watershed

A study of the Harris Gully Watershed at Rice University, an urban watershed flood study. Written by Andrew Juan, M.S., Graduate Student, Rice University Dr. Nick Fang, Project Manager, Rice University Dr. Philip Bedient, Professor of Engineering, Rice University

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Redwood Drainage Basin Master Plan

Stormwater Master Plan Development Employing an Integrated 1D/2D Model for the Redwood Basin in Josephine County, Oregon. Written by Ryan Retzlaff, Cardno and Anthony Kuch, XP Solutions Featured in Stormwater Solutions Magazine, May/June 2012 Issue

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Vancouver Public Library Green Roof Monitoring Project by Kerr Wood Leidal Associates Ltd., Burnaby, B.C.

Modelling Overland Flows and Drainage Augmentations in Dubbo by Cardno Willing (NSW) Pty Ltd

1D/2D Modelling Approach to Predict Flooding in Nagoya, Japan by Pacific Consultants Inc.

Bioecods Modelling Using SWMM from Malaysia

GIS Applications in Urban Drainage Master Planning by Robert Muir, Water Resources Engineer, Dillon Consulting Ltd