BMP Monitoring Sites - Urban Drainage and Flood Control District

More documents

Recommendations

Info

UDFCD BMP MONITORING SITES Orchard Pond EDB overflows should be designed in accordance with local drainage criteria and should consider UDFCD dropstructure design guidelines or the use of buried soil riprap or reinforced turf mats installed per manufacturer recommendations. Vegetation Access Inlet Forebay Design Bottom vegetation provides erosion control and sediment entrapment. Pond bottom, berms and side sloping areas may be planted with native grasses or irrigated turf, depending on the local setting and needs. All-weather, stable access to the bottom, forebay and outlet works area shall be provided for maintenance vehicles. Grades should not exceed 10 percent, and a solid driving surface of gravel, rock, concrete, gravel-stabilized turf, or Type VL soil riprap should be provided. Dissipate flow energy at pond’s inflow point(s) to limit erosion and promote particle sedimentation. Inlets should be designed in accordance with UDFCD drop structure criteria, impact basin outlet details or other types of energy dissipating structures. Provide an opportunity for larger particles to settle out in the inlet in an area that has a solid surface bottom to facilitate mechanical sediment removal. A rock berm or concrete wall should be constructed between the forebay and the main extended detention basin. The forebay volume of the permanent pool should be about 3 to 5% of the WQCV. A pipe throughout the berm to convey water the main body of the basin should be offset from the inflow streamline to prevent short circuiting and should be sized to drain the forebay volume in 3 to 5 minutes, respectively. The floor of the forebay should be concrete or grouted boulder lined to define sediment removal limits.
UDFCD BMP MONITORING SITES Orchard Pond EDB Flood Storage Multiple Uses Combining the water quality facility with a flood control facility is recommended. The 5-year, 10-year, 100-year or other floods may be detained above the WQCV. When desirable and feasible, incorporate the extended detention basin within a larger flood control basin. Also, whenever possible, try to provide for other urban uses such as active or passive recreation and wildlife habitat. If multiple uses are being contemplated, use the multiplestage detention basin design approach to limit inumdation of passive recreational areas to one or two occurrences a year. The area within the WQCV is not suited for active recreation activities such as ballparks, playing fields, and picnic areas. There are best located above the WQCV level.
Page 2 and 3:
UDFCD BMP MONITORING SITES Overview
Page 4 and 5:
UDFCD BMP MONITORING SITES Pervious
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19: UDFCD BMP MONITORING SITES Pervious
Page 20 and 21: UDFCD BMP MONITORING SITES Pervious
Page 22 and 23: UDFCD BMP MONITORING SITES Porous A
Page 34 and 35: UDFCD BMP MONITORING SITES Permeabl
Page 46 and 47: UDFCD BMP MONITORING SITES Sand Fil
Page 48 and 49: UDFCD BMP MONITORING SITES Open Bed
Page 60 and 61: UDFCD BMP MONITORING SITES Orchard
Page 64 and 65: Orchard Pond EDB - Flow Dissipater
show all

BMP Monitoring Sites - Urban Drainage and Flood Control District

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?