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Floating Debris Boom Performance Test Full modeling report in [pdf] Modeling Scope This model study was
projected to be capable of providing the best performing draft design of
floating booms barriers and their application in existing scaled arroyo
models. The test was composed of the
initial design task of a 1:18 scaled model floating boom in a rectangular
flume and the application task of a
model in a trapezoidal section arroyo scale model. The trapezoidal section task is a 1:8 scaled model of the North
Pino Arroyo, which is adjacent to the North Diversion Channel located in
northeast Albuquerque. In addition,
commercial floating boom barriers were reviewed regarding debris exclusion
capability in arroyos. Summary and Recommendations With the results of
the modeling tests, the floating boom is recommended to be approximately 1.0
ft in diameter of Styrofoam bar covered with fiberglass in the case of a 6 ft
deep, 132 ft2 section of trapezoidal arroyo. Stainless steel connectors will hinge the
booms to each other. Figure 1 shows
one of the commercial floating booms and their materials and connections. For the floating boom setup, a 30° or less boom barrier approach angle and a sloped
downstream pier are recommended.
a) Floating boom materials b) Boom hinged connections
Figure 1. Commercial Floating Boom
Combinations of the
log boom and buoyancy boom are suitable for the storm water debris control in
trapezoidal arroyos and drain channels, while the buoyancy boom type is good
for sediment detentions or reservoirs.
Length of the log boom shall be match the bed width of arroyo, and
couples of the buoyancy booms are good for sidewall because of the better
flexibility to follow low and high water depth as shown Figure 2.
Figure
2. Floating Boom Application in Trapezoidal Arroyo
Off-site Storm Water Quality Facility in North Pino Modeling Report in [pdf] Objectives: Maximum intake of storm water debris
into the detention pond pipe. Safe storm water drainage through
channel. Location: North Pino, Albuquerque, New
Mexico Proceeding: 1:8 scale physical experiments with
three scenarios ·
As-Design Weir Model ·
Sloped Side Wall Model ·
Sloped Side Wall with Step Model Solutions: High intake of storm water first
flush with floating debris. Streamlined
and no splash channel design. Recommended Model Designs: As-Design
Weir Model Performance: Floating debris are just washed away along the channel not
inflowing to the culvert. Drains
more along the channel than the culvert connected to the detention pond. Water splash might be at the weir in low flow rate. Hydraulic jump is occurred different location for each flow
rate. Weir structure safety problem due
to heavy storm water waste.
Culvert entrance at the
channel bottom Debris
removing experiment Rating curves of channel and culvert Click Figure for Sequence H-J Images ! Hydraulic jump
location at 2.0 cfs Sloped
Side Wall with Step Model Performance: Maximum debris removing capacity among three models. Drains
more along the culvert than the channel. No
significant water splash and hydraulic jump. SSWS model at 133
cfs discharge
Experiment with AMAFCA Engineers
Rating curves of SSWS model
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