Irrigation Flashcards
The localized lowering of the static or piezometric water level
due to pumping
Drawdown
What is the maximum water quantity that
can be guaranteed during critical period?
Safe yield
It is natural or artificial channel that shortens a meandering
stream.
Cut off
A concept used to evaluate the losses of water during
irrigation from the time it leaves that source to the point of use.
irrigation efficiency
An appurtenance to the pipeline which permits the passage
of air to or from the pipeline
vent
Irrigation structure that divides the water into 2 main laterals.
bifurcation
The amount of water used in producing crop is:
water holding capacity
A temporary method of drainage artificially produced in the
subsoil with digging a trench from the surface.
mole drain
The amount of drainage water to be removed per unit time per
unit area is the
Drainage coefficient
1.A mathematical expression for the macroscopic flow of water
through a porous system
Darcy’s La
Run-off is the difference between the gross depth of irrigation
water and the
Depth that infiltrated
It is the type of sprinkler irrigation system where the number of
laterals installed is equal to the total number of lateral positions.
Set system
The infiltration equation based on the exhaustion process is the
Horton’s
In surface irrigation, the ratio between the gross amount of
irrigation water and the net requirement of the crop is the
Application efficiency
Distribution control structures placed across an irrigation ditch
to block the flow temporarily and to raise the upstream water
level
Checks
