8 Sub-Basins acres. 5 Outflow Locations 29 billion gallon/day capacity. Drainage Basin 1. 17th st. canal. pump st. 12. pump st. 19. pump st.

Transcription

1 th st. canal pump st. orleans canal london ave. canal s 0 acres pump st. 9 Outflow Locations 9 billion gallon/day capacity th st canal pump st. orleans canal london ave. canal pump st. 9 to lake ponchartrain to lake ponchartrain to lake ponchartrain to lake ponchartrain to industrial canal rainage asin rainage asin is divided into sub-basins, which flow to locations, flowing into Lake Ponchartrain and one into the Industrial canal. The drainage system is a complex network of block-scale small pipes and box canals which feed into a larger neighbourhood system, in turn feeding into the city-scale network of canals, both above and below ground. There are approximately 90 miles of open canals and 90 miles of underground canals in the system. The system's pumping capacity is over 9 billion gallons a day, which is enough to empty an area 0 square miles by. feet deep per day. uring a rain event, the system has / inch of storage after which time it can drain at a constant flow of / per hour at a maximum. The diagrams in the accompanying panels demonstrate the relationship between the political jurisdictions of New Orleans drainage network in relationship to the catchment areas served by the drainage network. What is revealed in the following diagrams is that a pattern of political misalignment is currently present which in turn forces the pumping capacities of several of the catchment outfall areas to operate at a rate that is beyond their normal operating standards. Equally compelling is the amount of surface area in the city that is impermeable. In many cases, this condition is responsible for the constant flooding that occurs even in a typical rainfall. The Underground Waterways (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer

2 miles 0,000 ft The th Street anal outflow serves drainage sub-basins &. Surface ondition drainage sub-basin = acres drainage sub-basin = acres total = acres of surface area ox ulvert under Street =,,000 sq ft ox ulvert under Median t apacity th Street anal drains into Lake Pontchartrain at a rate of:. million sq ft x / in./hr = rainage System Taxonomy,00,000 cu. ft./hr? anal St. Pump Station pumps water from and unknown sub-asing in Jefferson Parish on the th street canal? Pump Station at Flood Wall ox ulvert Transition 0+ open canal + -0 open canal ~ ft 0~ ft ~0 ft th Street anal + -0 box culvert +0 - box culvert + -0 box culvert +0 - box culvert + -0 box culvert + - box culvert + -0 pipe + - pipe ~ ft ~ ft ~ ft 0 ~ ft - ~ 0 ft - ~ - ft - ~ - ft - ~ - ft (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only)

3 0 miles,000 ft The location of Pump Station allows it to act as an outflow draining its own sub-basin. Surface ondition drainage sub-basin = 9 acres = 0,,000 sq ft ox ulvert under Street t apacity Pump Station drains into Lake Pontchartrain at a rate of: ox ulvert under Median 0. million sq ft x / in./hr =,00,000 cu. ft./hr rainage System Taxonomy Pump Station at Flood Wall ox ulvert Transition 0+ open canal + -0 open canal ~ ft 0~ ft ~0 ft + -0 box culvert +0 - box culvert + -0 box culvert +0 - box culvert ~ ft ~ ft ~ ft 0 ~ ft + -0 box culvert + - box culvert + -0 pipe - ~ 0 ft - ~ - ft - ~ - ft (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Pump Station + - pipe - ~ - ft Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only)

4 miles 0,000 ft The Orleans canal exit serves drainage sub-basins &. Surface ondition drainage sub-basin =, acres ( mil. sq/ft) drainage sub-basin =, acres (. mil. sq/ft) total =, 09 acres of surface area ox ulvert under Street =, 00, 00 sq/ft t apacity Orleans anal drains into Lake Pontchartrain at a rate of: ox ulvert under Median, million sq/ft x / in/hr = rainage System Taxonomy, 0, cu. ft. Pump Staion at Flood Wall 0+ open canal + -0 open canal ~ ft 0~ ft ~0 ft ox ulvert Transition + -0 box culvert +0 - box culvert + -0 box culvert +0 - box culvert ~ ft ~ ft ~ ft 0 ~ ft + -0 box culvert + - box culvert - ~ 0 ft - ~ - ft (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer System Evaluation and Rehabilitation Program Orleans anal + -0 pipe + - pipe - ~ - ft - ~ - ft Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only)

5 miles 0,000 ft The London canal outflow serves drainage sub-basins &. drainage sub-basin = acres drainage sub-basin = 9 acres total = acres of surface area ox ulvert under Street Surface ondtion = 9,0,0 sq ft t apacity London anal drains into Lake Pontchartrain at a rate of: ox ulvert under Median 9. sq ft x / in./hr = rainage System Taxonomy,00, cu. ft. Pump Staion at Flood Wall ox ulvert Transition 0+ open canal + -0 open canal ~ ft 0~ ft ~0 ft London anal + -0 box culvert +0 - box culvert + -0 box culvert +0 - box culvert + -0 box culvert + - box culvert + -0 pipe + - pipe ~ ft ~ ft ~ ft 0 ~ ft - ~ 0 ft - ~ - ft - ~ - ft - ~ - ft (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only)

6 miles 0,000 ft Th drainage basin served by s & 9 exits through station 9 into the industrial canal and through station out to Lake Ponchartrain. The total surface area served by this canal is calculated below. Surface ondition When Rain falls at one-inch per hour, the New Orleans rainage asin system is at capacity. The system has / inch of storage and can drain at a constant flow of / per hour max. ox ulvert under Street drainage sub-basin area= acres total = acres of surface area ox ulvert under Median =,000,000 sq ft rainage System Taxonomy t apacity (0. of rain per hour) s & 9 drain a total of:,0,000 cu. ft. 9 Pump Staion at Flood Wall, 0+ open canal + -0 open canal + -0 box culvert +0 - box culvert + -0 box culvert +0 - box culvert ~ ft 0~ ft ~0 ft ~ ft ~ ft ~ ft 0 ~ ft 9 up to >> ox ulvert Transition Pump Stations & box culvert + - box culvert + -0 pipe + - pipe - ~ 0 ft - ~ - ft - ~ - ft - ~ - ft (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only)

7 n ayou St Joh Manhole rain at Gutter Permeable Surface +0 - box culvert + -0 box culvert N pipe pipe 00 ft 0 00 m (00) System Wide rainage Network; Sewerage & Water oard of New Orleans Sewer System Evaluation and Rehabilitation Program Linear Force Pump; from 009 Gutter to Gulf Machinery Pump Technology Study(Machinery Pump Technology ) Single, ouble, & Triple ulvert etails; from San iego Regional rainage Engineering Standard rawings(for shape reference only) From the Gutter