Unit 4 Flashcards
Permanent waterways that suppy water to irrigated lands from an irrigation source.
Canals
It is the key component of an irrigation system
Irrigation network
Devices and facikitiesnused for water measurement
Gauges
It is used to control water dischsrge in canals
Checks or Head Regulators
Are used for the connection of canal reaches.
Check drops, chutes
are used in canals for the retention of debris/silt
Sediment tanks, guide systems
This canal delivers water from a river, reservoir, well, etc. to inter-farm distributors.
Main Canal
These canals deliver water to particular farms or crop rotation sites.
Inter-farm distributors
These canals deliver water to crop-rotation fields or irrigated sites
On-farm distributors
It consist of temporary irrigation ditches, auxiliary ditches, or taken by sprinkling and irrigating machines.
Regulatory Network in Open Irrigation
Temporary irrigation ditches and auxiliary ditches are replaced by underground pipelines, moveable spray hoses, or collapsible pipelines.
Closed Irrigation Systems
It is a network of installation consisting of pipes, valves, pumps, and other devices properly designed and installed to supply water under pressure from the source ofnwater to the irrigable area.
Piped Irrigation Network
For surface irrigation method, where large heads are not required, the underground pipeline system used is:
Low pressure system, open or semi-closed system
This system is open to the atmosphere where the opersting pressure seldom exceeds to 5m or 6m
Open/Semi-closed system
