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Water Use Efficiency


Quiz Questions

1.In the five years to 2000-01, irrigated agriculture contributed __________ of the net economic return from all agriculture, from only 0.5% of agricultural land in Austrailia.
A quarter
Half
All of
None
2. In Australia, irrigated agriculture uses what percent of consumed water?
20%
50%
75%
90%
3.While awareness of the finite nature of water resources is increasing, detailed data relating to water use are:
Widespread
Scarce
4.What is the prerequisite to achieving the equitable sharing of, and maximizing the sustainable benefit from, water resources?
Well defined water property right
Protected water property right
None of the above
All of the above
5.To be able to quantify any improvements in irrigation performance obtained either through better management or through the application of technology, it is important to measure a baseline efficiency. This baseline refers to the performance of the system _________ improvements are implemented.
Before
After
6.The size of water savings achieved as a result of increased efficiency depend on:
the perspective of the person evaluating the system
the spatial scale in which the investigation is being made
the use that is made of the ‘saved’ water
All of the above
7. Comparing water use indices across different industries is difficult as the variables measured are generally:
The same
Not the same
8.Field efficiency can be defined as a ratio of the volume of irrigation water used by the plant to the _________ of water delivered to the field.
Size
Color
Volume
All of the above
9. In Australia, the water reform process has ________ the amount of water that can be extracted from rivers and storage systems.
Restricted
Left open
10.Water is mainly lost from storages through:
Leakages
Evaporation
Animal consumption
None of the above
11.Calculating the is the _________ key to estimating storage efficiency.
Seepage loss
Water balance
Water cost
None of the above
12.Subterranean dams store freshwater underground in existing aquifers in the ________ season.
Rainy
Dry
13.Conveyance losses are defined as those that occur from the time water is released from the reservoir to when it is delivered to the farm gate. It includes:
evaporation
transpiration
seepage losses
All of the above
14.Distribution uniformity (DU) is a measure of how ________ water is applied during an irrigation event.
Creatively
Moderately
Evenly
None of the above
15. Managing irrigation at the field scale can be improved by quantifying the:
Water coloring
Water balance
Water seepage
Water loss