Irrigation and Drainage Engineering Flashcards
6 cards from real Agricultural/Bioengineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Irrigation and Drainage Engineering flashcards as text
The Penman-Monteith equation is used in irrigation planning to calculate:
Answer: Reference evapotranspiration (ETo)
The FAO Penman-Monteith equation is the standard method for estimating reference evapotranspiration (ETo) from meteorological data for irrigation scheduling.
A center-pivot irrigation system rotates around a central point, covering a field shaped like a:
Answer: Circle
Center-pivot systems irrigate a circular area as the lateral arm rotates 360° around the pivot point, leaving corners of square fields unirrigated.
Waterlogging in agricultural fields occurs when:
Answer: The water table rises to or near the root zone, limiting aeration
Waterlogging occurs when the water table rises into or near the crop root zone, displacing air and causing anaerobic conditions harmful to plants.
The hydraulic gradient in a drainage system is best defined as:
Answer: The change in hydraulic head per unit distance in flow direction
Hydraulic gradient is the ratio of the difference in water pressure head to the flow distance, driving water movement toward drain pipes.
Sprinkler irrigation is generally preferred over surface irrigation on:
Answer: Steep or irregular topography where surface methods would cause erosion
Sprinkler systems can apply water uniformly on irregular terrain where surface irrigation would cause runoff, erosion, or uneven distribution.
Net irrigation requirement is calculated as:
Answer: Crop evapotranspiration minus effective rainfall
Net irrigation requirement equals the crop's ET demand minus effective rainfall, representing the irrigation water needed to meet the deficit.