|
|
|
|
|||||||
|
|
|
La Cueva Curve Water Intake Modeling Full
modeling report in [pdf] Purpose
The La Cueva arroyo runs east to west,
just north of Alameda Blvd., in northeast Albuquerque. A series of projects have been completed to
try to find the best technology to improve storm water quality at the end of the arroyo where it
discharges into the North Diversion Channel. A series of baffle and weir structures have been designed to remove
debris from more frequent flows and to remove the first flush from the more rare
larger events. A series of four pipes will remove approximately 1,700 cfs of flow out of the
4,800 cfs designed trapezoidal channel, divert it into these storm water quality facilities, and
then discharge the treated water back into the North Diversion channel. The La Cueva arroyo is located in northeast
Albuquerque directly south of the Balloon Fiesta Park, as shown
below.
At grade outlets, whether pipes or box
culverts, are effective in removing flow from a curved channel when assisted with a longitudinal
vane. Any acceleration of flow in a supercritical channel can result in an
undesirable rooster tail effect. This effect can be avoided by minimizing
acceleration of flow. In particular, if a longitudinal vane contracts the
flow too quickly, a rooster tail effect can occur. Similarly, a channel
bottom drop accelerates the flow. In the case of the modeled drop, the
rooster tail effect is enhanced by both the drop and change in flow
direction. A stilling basin design (similar to that on the North Pino) is
more effective in that the hydraulic jump takes place across the channel. As
designed in these model studies, the box culvert capacity is controlled by
the capacity of the box channel. In the model, the box was placed on the same
slope as the main channel. The actual slope of the box is unknown at this
time and will be determined by the designer.
Flow rate
1,225 cfs A short, tapered vane downstream of an at
grade box culvert is expected to work very well in the La Cueva channel. The upstream end of the
vane should be designed with maintenance trucks in mind. The downstream end of the vane
should end at least two feet below the top of the channel. The vane, as modeled, was at a 32 degree
angle from the straight line of the upstream channel. The at-grade box culverts were modeled at
33 and 44 degrees from a tangent of the curve. Turf Buoyancy Test Full modeling report in
[pdf]
Exploring the use of artificial turf in a detention pond The Albuquerque Metropolitan Arroyo Flood Control
Authority (AMAFCA) constructs and maintains detention ponds throughout
the Albuquerque area. In some instances, these detention ponds can serve multiple
purposes. For example, Mariposa Detention Basin is also a City of Albuquerque park with soccer fields,
baseball fields, playgrounds, etc.; while Arroyo del Oso and Ladera are
golf courses that serve as detention ponds. Artificial turf is growing in popularity
in arid and semi-arid regions as demands on water resources increase. The purpose of this study
is to determine whether using artificial turf is a viable alternative for playing fields that are located in detention ponds. Although artificial turf makes for water
savings in arid and semi-arid environments, it is in these same environments that increased
temperatures would be a concern for young athletes. Furthermore, the artificial turf
is not recommended for multi-use facilities where the playing
fields are located in detention ponds. [Back] [Top of the Page] |
|||||||||||
|
|
|
|
