# Management and Use of Water. Present by : Yonatan Yahkoby.

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Management and Use of Water. Present by : Yonatan Yahkoby

2 To understanding water conservation The key

3 Is to know that the water requirements of plants can be calculated......easily Is to know that the water requirements of plants can be calculated......easily

4 The thing to do? To work out how much each type of plant requires. To work out how much each type of plant requires.

5 Theres no need to be brilliant Theres no need to be brilliant

6 Quantities are expressed in mm. So that 1mm of water per sq. meter equals 1 liter of water.

7 1mm per dunam equals 1 cubic meter of water. Or

8 In Tel Aviv for example the water needs of different plants are as follows.

9Lawns=700mmLawns=700mm Trees=250mmTrees=250mm Shrubs=200mmShrubs=200mm Water required in Tel Aviv PER ANNUM

10 Water required in Tel aviv PER ANNUM Palms=400mmPalms=400mm Perennials=300mmPerennials=300mm Annuals=900mmAnnuals=900mm

11 1+2=?1+2=? What does this mean in terms of QUANTITIES?

12 Then if the area of lawn=100m2 (sg. meter) Then if the area of lawn=100m2 (sg. meter) ?? If 1mm =1 liter per sq. meter

13 Then the lawn will need Then ? ?

14 Lawn Requires 700 mm per annum i.e 700 liters per sq. meter As lawn area =100 sq. meters So Quantity required per annum? Lawn Requires 700 mm per annum i.e 700 liters per sq. meter As lawn area =100 sq. meters So Quantity required per annum?

15 700 X 100 = 70,000 or 70 Cubic meters 700 X 100 = 70,000 or 70 Cubic meters

16 Lets see how these principles can be applied at the earliest stages Of the...... DESIGN PROCESS Lets see how these principles can be applied at the earliest stages Of the...... DESIGN PROCESS

17 AndAnd For example Mr. Levi Mr. Cohen

18 Have bought identical plots measuring 1 dunam in Tel Aviv.

19 Lawn Flowers Shrubs Fruit Trees Mr. Cohens garden Sub-tropicalTrees.

20 670 Cubic m. Plant type Annual requirements mm Area Sq. meters Actual water usage m 3 Lawn700750525 Fruit Trees 60010060 Hedge40010040 Flowers9005045 Total6701,000670 How much water does Mr. Cohen use?

21 Shrubs Decid. Trees SeatingFlowers Mr. Levis garden

22 136 CUBIC m. How much water does Mr. Levi use? Plant Type Annual requirements mm Area Sq. meters Actual water usage m 3 Decid. trees 200500100 Shrubs10018018 Flowers9002018 Mulch02500 Seating areas 0500 Total1361,000136

23 And when it comes to paying the bills! Mr. Cohen Mr. Levi

Management and Use of Water. Present by : Yonatan Yahkoby

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