Canal Maintenance and Operation

Canal Maintenance & Operation

Canals are man-made channels for water.

There are two types of canal:

1.) Waterways: navigable transportation

2.) Aqueducts: water supply canal

CANAL SYSTEM

a.) Main Canal

b.) Branch Canal

c.) Major Distributary

d.) Minor Distributary

e.) Field Channel

Major tasks in operation

•DREDGING

•HEDGE LAYING

•TOWPATH RESURFACING

Aquatic plants can be divided into three types:

•emergent species

•submerged species and

•Floating species

MAIN CONSIDERATIONS:

•the effects on downstream flows or aquifers

•the effects on the volume and rate of runoff, infiltration, evaporation, transpiration, deep percolation, and ground water recharge.

•the effects of erosion of banks and beds and the movement of sediment, and the soluble and sediment-attached substances carried by runoff and the movement of dissolved substances to groundwater.

•Consider the effects on wetlands or water-related wildlife habitats.

Conveyance Structures for Canal Flows

A canal conveying water from the head works has to run for large distances and has to maintain the water levels appropriately, as designed along its length. It has to run through terrains which generally would have a different slope small than the canal

The inverted syphons are structures for canal water conveyance below roads, railway lines and other structures . The longitudinal profile is not exactly in a straight line and the central portion is seen to sag beneath the object to be crossed.

SELECTION PROCESS FOR THE OPERATION METHOD

•the operational objective of the delivery system has to be defined first;

• an initial selection of the operation method follows directly from the operational objective

POTENTIAL ADVERSE IMPACTS

The proposed canal improvements, regardless of when they are constructed, may potentially impact :

•1) rate of inflow to the STAs,

CONCLUSION

•Reduce hydraulic losses within the primary canal system and supporting the objectives of the Lake.

•Reducing the risk of flood damage to agricultural and urban lands.

•Improving water quality by removing existing canal organic sediments and reduce the transport of future canal sediments by lowering velocities.

References

Burns And Mcdonnell. Everglades Protection Project: Conceptual Design. February 15,1994. SFWMD. West Palm Beach, Florida. SFWMD. Feb. 1994

Water Measurement Manual (Third Edition) And The Canal Systems Automation Manual, Volumes 1 And 2.

South Florida Water Management District. DBHYDRO (Selected Records)

South Florida Water Management District. Structure Books.