منابع مشابه
Detention Basin Sizing for Small Urban Catchments
The Federal Aviation Administration (FAA) method for sizing small detention and retention basins is a volume-based approach that is sensitive to the release rate. In practice, such a release rate is often approximated by open channel hydraulics or culvert hydraulics. Without a consistent guideline, this practice of approximation can result in significant discrepancy or violation of the volume b...
متن کاملEquivalent roughness of gravel-bed rivers
The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and free of vegetation or obstacles. According...
متن کاملWater quality performance of a batch-type stormwater detention basin.
The objective of this research was to modify an extended detention basin to provide batch treatment of stormwater runoff. An automated valve/controller was developed and placed on the outlet of a detention basin in Austin, Texas, which allowed the water quality volume to be retained in the basin for a preset length of time. The influent and effluent of the modified basin were monitored for tota...
متن کاملRetrofitting Detention Basin with Water Quality Control Pool
Many detention basins built before 1990 are not equipped with stormwater quality control device. With the latest developments in low impact development (LID) for storm water management, these existing detention basins need modifications on their outlet structures to increase on-site runoff treatment and disposal. An outlet shall be designed to have, at least, three levels of release, including ...
متن کاملA Simple Algorithm to Relate Measured Surface Roughness to Equivalent Sand-grain Roughness
One of the most important resources available in the field of fluid mechanics, the Moody Chart gives Darcy friction factor as a function of Reynolds number and relative roughness. The experimentalists who generated the data correlated in the Moody Chart, however, roughened pipe surfaces by coating their internal surfaces with a monolayer of sand, the pipe wall roughness being defined as the ave...
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ژورنال
عنوان ژورنال: PROCEEDINGS OF THE JAPANESE CONFERENCE ON HYDRAULICS
سال: 1989
ISSN: 1884-9164,0913-4131
DOI: 10.2208/prohe1975.33.169