| 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. |
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A quarter |
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Half |
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All of |
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None |
| 2. |
In Australia, irrigated agriculture uses what percent of consumed water? |
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20% |
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50% |
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75% |
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90% |
| 3. |
While awareness of the finite nature of water resources is increasing, detailed data relating to water use are: |
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Widespread |
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Scarce |
| 4. |
What is the prerequisite to achieving the equitable sharing of, and maximizing the sustainable benefit from, water resources? |
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Well defined water property right |
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Protected water property right |
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None of the above |
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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. |
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Before |
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After |
| 6. |
The size of water savings achieved as a result of increased efficiency depend on: |
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the perspective of the person evaluating the system |
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the spatial scale in which the investigation is being made |
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the use that is made of the ‘saved’ water |
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All of the above |
| 7. |
Comparing water use indices across different industries is difficult as the variables measured are generally: |
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The same |
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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. |
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Size |
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Color |
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Volume |
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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. |
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Restricted |
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Left open |
| 10. |
Water is mainly lost from storages through: |
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Leakages |
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Evaporation |
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Animal consumption |
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None of the above |
| 11. |
Calculating the is the _________ key to estimating storage efficiency. |
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Seepage loss |
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Water balance |
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Water cost |
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None of the above |
| 12. |
Subterranean dams store freshwater underground in existing aquifers in the ________ season. |
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Rainy |
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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: |
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evaporation |
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transpiration |
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seepage losses |
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All of the above |
| 14. |
Distribution uniformity (DU) is a measure of how ________ water is applied during an irrigation event. |
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Creatively |
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Moderately |
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Evenly |
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None of the above |
| 15. |
Managing irrigation at the field scale can be improved by quantifying the: |
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Water coloring |
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Water balance |
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Water seepage |
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Water loss |
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