Developing Findings of Fact for a Hazard Mitigation and Preparedness Plan for the City of Waldport/Alsea Bay Area, Lincoln County, Oregon
Marine erosion attributed to the effects of the 1983 El Nino resulted in the loss of the distal tip of Alsea Spit in 1985 enlarging Alsea Bay inlet by 300% and subjecting the City of Waldport...
Little River: An Investigation of Coastal Environment
Little River is located about 6. 5 kilometres north of Comox on the east side of Vancouver Island. The last major flood in February of 1983 resulted in the river breaking through the beach...
Evaluation of and Recommendations for Drop Structures in the Denver Metropolitan Area
In 1982, the Denver Urban Drainage and Flood Control District published interim guidelines for the design of sloped, loose riprap drop structures, as well as vertical wall drop structures...
Parking Lot Drainage Design: Gainesville, Florida
The construction of a 10-acre (4. 05 ha) parking facility (1,000-car capacity) at the University of Florida during 1984 presented the potential for increasing downstream flooding and for...
Rehabilitation of Williams Bridge Dam
Pennsylvania Gas and Water Company initiated construction work to upgrade the 90-year old dam in order to meet current dam safety standards with emphasis on satisfying Probable Maximum...
Discharge and Depth Behind a Partially Breached Dam
The role that the velocity-distribution correction factor plays in the determination of the flood discharge and corresponding flow depth behind a partially breached dam is investigated....
Predicting and Minimizing Embankment Damage Due to Flood Overtopping
Under a contract with the Federal Highway Administration and Bureau of Reclamation, Simons, Li & Associates, Inc. (SLA) is conducting an overtopping damage study to evaluate various...
Limitations of Saint Venant Equations to Model Flood Waves
The subject of this paper is in direct contrast to all previously known research efforts. Previous effort has focused on simplified forms of Saint Venant using approximate routing models...
Improved Robustness of the NWS DAMBRK Algorithm
The combination dam breach and flood routing numerical model called DAMBRK has been developed by the National Weather Service (NWS) for forecasting river flooding events (Fread, 1984)....
Effects of Land Subsidence on Flood Profiles
In this study, the effects of land subsidence on water-surface elevation and depth profiles during flood conditions were investigated for a large, hypothetical, slope-controlled stream....
Flood-Control Channel Stability Assessment
Guidelines for conducting a stability assessment of a channel proposed to be modified for flood control are presented in this paper. The basis behind this assessment is that a channel...
Regulatory Floodway Width Estimation
A simple algebraic equation is presented for determining the width of the regulatory or designated floodway. The equation shows that for a given ratio of the permissible increase in flood...
Roughness Coefficients of Large Floods
Most hydraulic calculations of flow in channels and overbank areas require an evaluation of flow resistance generally expressed as Manning's roughness coefficient, n. Literature...
Diversion Structure for Peak Flow Reduction
The flood control requirements of a planned development in the City of Orange, California were such that the peak discharges ranging from an annual flood up to 25-year return period be...
Floodplain Regulation Downstream of Barrett Dam, CA
Barrett Dam is owned and operated by the City of San Diego, California. The Dam was built in the early 1920's to be an additional source of water for the growing City with...
California's Dam Safety Program?The Development of Hydrology for Dams (
California's water code provides for supervision of dams and reservoirs with regard to protection of life and property. This code is administered by the Department of Water...
General Considerations for Managing Floods and Droughts
Work described at this conference and future developmental work of water resource engineers will best contribute to professional improvement if such work is guided by appropriate objectives....
Mesonets--A Solution to Improving Flood Forecasting
Floods continue to cause major destruction annually despite the efforts of Federal water resources agencies. Improved flood forecasts can reduce flood damages and corresponding loss of...
Model Choice and Scale in Urban Drainage Design
This paper addresses the question of model choice and scale by comparing various model applications to a 95-acre gaged catchment, known as the Lake Hills watershed, in Bellevue, Washington....
Localized Effects of Subsidence on Flooding in a Small Urban Watershed
Extensive pumpage of groundwater in the Houston, Texas, metropolitan area in the last century has caused compaction of the clay layers in the local aquifers with resulting widespread land...
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