Management and Use of Water. Management and Use of Water.

Present by : Yonatan Yahkoby Present by : Yonatan Yahkoby

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To understanding water conservationTo understanding water conservationTo understanding water conservationTo understanding water conservation

The keyThe key

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Is to know that the water requirements of Is to know that the water requirements of

plants can be calculated plants can be calculated ......easily......easily

Is to know that the water requirements of Is to know that the water requirements of

plants can be calculated plants can be calculated ......easily......easily

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The thing to do?The thing to do?

To work out how much each type of To work out how much each type of

plant requires.plant requires.

To work out how much each type of To work out how much each type of

plant requires.plant requires.

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Albert Einstein

There’s no need

to be brilliant

There’s no need

to be brilliant

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Quantities are expressed in mm.Quantities are expressed in mm.

So that 1mm of water per sq. So that 1mm of water per sq.

meter equals 1 liter of water.meter equals 1 liter of water.

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1mm per dunam1mm per dunam

equals 1 cubic meter of water.equals 1 cubic meter of water.

OrOr

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

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Lawns=700mmLawns=700mmLawns=700mmLawns=700mm

Trees=250mmTrees=250mmTrees=250mmTrees=250mm

Shrubs=200mmShrubs=200mmShrubs=200mmShrubs=200mm

Water required in Tel AvivWater required in Tel AvivPER ANNUMPER ANNUM

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Water required in Tel avivWater required in Tel avivPER ANNUMPER ANNUM

Palms=400mmPalms=400mmPalms=400mmPalms=400mm

Perennials=300mmPerennials=300mmPerennials=300mmPerennials=300mm

Annuals=900mmAnnuals=900mmAnnuals=900mmAnnuals=900mm

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1+2=?1+2=?1+2=?1+2=?

What does this meanWhat does this meanin terms of QUANTITIES? in terms of QUANTITIES?

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Then if the area of lawn=100m2Then if the area of lawn=100m2

(sg. meter)(sg. meter)

Then if the area of lawn=100m2Then if the area of lawn=100m2

(sg. meter)(sg. meter)????

If 1mm =1 liter per sq. meterIf 1mm =1 liter per sq. meterIf 1mm =1 liter per sq. meterIf 1mm =1 liter per sq. meter

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Then Then

the lawn will needthe lawn will need

Then Then

the lawn will needthe lawn will need

??

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Lawn RequiresLawn Requires

700 mm per annum700 mm per annum

i.e 700 liters per sq. meteri.e 700 liters per sq. meter

As lawn area =100 sq. metersAs lawn area =100 sq. meters

SoSo

Quantity required per annum?Quantity required per annum?

Lawn RequiresLawn Requires

700 mm per annum700 mm per annum

i.e 700 liters per sq. meteri.e 700 liters per sq. meter

As lawn area =100 sq. metersAs lawn area =100 sq. meters

SoSo

Quantity required per annum?Quantity required per annum?

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700 X 100 = 70,000700 X 100 = 70,000

oror

70 Cubic meters70 Cubic meters

700 X 100 = 70,000700 X 100 = 70,000

oror

70 Cubic meters70 Cubic meters

Albert Einstein

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Let’s see how these principlesLet’s see how these principles

can be applied at the earliest stages Of can be applied at the earliest stages Of

the ......the ......

DESIGN PROCESSDESIGN PROCESS

Let’s see how these principlesLet’s see how these principles

can be applied at the earliest stages Of can be applied at the earliest stages Of

the ......the ......

DESIGN PROCESSDESIGN PROCESS

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AndAndAndAnd

For exampleFor example

Mr. LeviMr. LeviMr. LeviMr. LeviMr. CohenMr. CohenMr. CohenMr. Cohen

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

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LawnLawn FlowersFlowersShrubsShrubsFruit TreesFruit Trees

Mr. Cohen’s gardenMr. Cohen’s garden

Sub-tropical Sub-tropical Trees.Trees.

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670 Cubic m. 670 Cubic m.

Plant typePlant type Annual Annual requirements mmrequirements mm Area Sq. metersArea Sq. meters Actual water Actual water

usage musage m33

LawnLawn 700700 750750 525525

Fruit TreesFruit Trees 600600 100100 6060

HedgeHedge 400400 100100 4040

FlowersFlowers 900900 5050 4545

TotalTotal 670670 1,0001,000 670670

How much water does Mr. Cohen use?How much water does Mr. Cohen use?

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ShrubsShrubsDecid. TreesDecid. TreesSeatingSeating FlowersFlowers

Mr. Levi’s gardenMr. Levi’s garden

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136 CUBIC m.136 CUBIC m.

How much water does Mr. Levi use?How much water does Mr. Levi use?

Plant TypePlant Type Annual Annual requirements mmrequirements mm Area Sq. metersArea Sq. meters Actual water Actual water

usage musage m33

Decid. treesDecid. trees 200200 500500 100100

ShrubsShrubs 100100 180180 1818

FlowersFlowers 900900 2020 1818

MulchMulch 00 250250 00

Seating areasSeating areas 00 5050 00

TotalTotal 136136 1,0001,000 136136

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And when it comes to And when it comes to paying the bills!paying the bills!

Mr. CohenMr. Cohen Mr. LeviMr. Levi

Management and Use of Water.Management and Use of Water.

Present by : Yonatan Yahkoby Present by : Yonatan Yahkoby