5
1. The technological process
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1.
Discuss the project for a few minutes.
2.
Agree on definitions for the following terms and write them in your exercise book: evaporation, run-off, water wasted through infiltration,
flood irrigation, sprinkler irrigation and drip irrigation.
3.
Discuss your definitions in class and agree on them with the help of your teacher.
Before you begin… Answer
The system must be able to water six plants with 0.6 litres each per day, that is, each plant receives 0.6 litres per day.
The materials you use should be everyday items with the lowest possible cost, preferably recycled materials (plastic bottles, corks, marbles,
cotton, plastic tubes, etc.).
You will propose at least three possible solutions. The group will choose one and you must explain your choice.
You must hand in a project report signed by all the group members.
As an option, you can make a presentation or video of the whole process (from the proposals to the solution).
Specifications
FINAL TASK
Designing a drip irrigation system
What
do you have to do?
1
Work in a group of 4 to 6 students.
2
Nominate a coordinator or representative for the group; other duties
will be shared out among the rest of the group later.
3
Look up information about different design solutions for drip irrigation
systems.
4
Design a drip irrigation system following the process described in the
unit, following the stages and creating the documents required.
5
Build the drip irrigation system you have designed.
6
Test and check the system.
Water is essential for life. The quantity of fresh water
on Earth is limited. Preserving fresh water is important
for drinking water supplies, food production and
leisure activities. Water quality can be affected by
infectious substances, toxic chemicals or radiation.
Almost 70% of all available fresh water is used
for agriculture so we need to optimise methods of
watering crops to prevent wasting water through
evaporation
,
run-off
and
infiltration
too far from the
roots.
The project in this unit is to design and build a
homemade drip irrigation system
to optimise the
consumption of water for plants in a garden or a
school vegetable plot.
Flood irrigation
Sprinkler irrigation
Drip irrigation
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ADVANCE EDITION
