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WORKSHOP ON STRATEGIC PLANNING

WATER RESOURCES MANAGEMENT

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2.1 Base data for 2000 (input and output

2.1.1 !u"#i$ %ater Ser&i$e (!%SThe consumption for the )ld Town in *+++ is ,+ l-cap-d and the coverage is +/.

The consumption for the 0ew Town in *+++ is 1+ l-cap-d and the coverage is 2+/.

The medium demand for the )ld Town 3)T4 and 0ew Town 30T4 are '.) and 0.*+ M,'$

respectively. The demand was calculated using data from the *+++ census 3population4$ losses

and coverage.

2.1.2A-ri$u#turea Ri&er

5ultivated Area 6 (*.772 ha

5rop Rotation!

Agriculture emand 6'1.) M,'

" Desert

5ultivated Area 6 *++ ha

5rop Rotation !

Crop Rotation T/pe

Crop Rotation T/pe

R( Rice and 8egetables 9+

R* Wheat and 5otton 9+

"( 5itrus *+

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Grw#n-n.renew *#** Su((l) *#** ,),, *#** *#** ,),, +)+! $#$! $#$!Sur/#water0(i(e line1   418.00  Su((l)   0.58 0.15 0.00 411.34 1.83 3.48   "%#!, .*#'"

2Re.use drain3 "* *#** Su((l) 0.00    *#** *#**

 

T-tals &* All-4# !#&$ *#,' *#** !"#$ #,' "!#!" &#'' ,#"'

The total deficit for the allocation is :.(.

2.1. In&est,ents and E$ono,i$ Ana#/sis

%nvestments water supply ; )T < 0T < 8( uality 6 )T 6 part from groundwater part from surface water 3good ?uality4.

Water >uality 6 0T 6 part from groundwater part from surface water 3good ?uality4.

Employment ; 5onsidering the total amount of (*.2 Mm7-y it is possible to provideemployment for 7*++ individuals.

Also$ considering the area of *++ ha$ 7++ persons can be employed.

2.1. En&iron,enta# Aspe$ts

The amount of ).' M,'$ , / of the total volume 3(*.2 Mm74 is waste water.

Assuming a consumption of pesticides of (, @g-ha it is necessary ' ton of product to be

applied in an area of *++ ha.

d 3#4 i th it 3 4 l t *+ / i # > - A

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Agriculture emand 6 '0.1 M,'

" Desert

5ultivated Area 6 *++ ha

5rop Rotation

Crop Rotation T/pe

R( Rice and 8egetables *+

"( 5itrus 9+"* Apple 9+

Agriculture emand 6 . M,'

2.2.' Industr/

emand ( Mm7

2.2. Annua# %ater De,and and A##o$ation

Total groundwater renewed 6 *1., Mm7.

The allocation of the volumes demanded from each resource was done preferably considering

the location of the user and the type water resource available 3river$ desert a?uifer or surface

water4. Also it was considered the environmental issue in order to have the minimum

d d i b th if t ki th d fi it f th d t if t ti th th

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%nvestments Agriculture River = 0.+) M,u

%nvestments Agriculture esert = 0.2* M,u

The Benefits$ considering the unit price of +.( mu-year 3"W# and Agriculture4 and +.*mu-year 3industry4 will be for each activity as shown bellow!

%n *+++ ; Agriculture in the River area! R( = 9*.:7$ R* = 9,.9 and "( = **.9. Total amount

of ((+.1:.

%n *+(+$ Agriculture in the River area! R( = ,7.1$ R* = 7:.17 and "( = (.29. Total amount

of ((+.*9.#ubstracting the two values it gets a value of 0. M,u of benefits.

%n the desert area the benefits will be Cero$ because the values for *+++ and *+(+ are thesame.

2.2.+ So$ia# Aspe$ts

Water >uality 6 )T 6 part from groundwater part from surface water 3good ?uality4.

Water >uality 6 0T 6 part from groundwater part from surface water 3good ?uality4.

Employment ; 5onsidering the total amount of ( Mm7-y it is possible to provide

employment for 9+++ individuals.Also$ considering the area of *++ ha$ 7++ persons can be employed.

2.2. En&iron,enta# Aspe$ts

The amount of (+.9 Mm7$ , / of the total volume 3( Mm74 is waste water.

Assuming a consumption of pesticides of (, @g-ha it is necessary 7 ton of product to be

applied in an area of *++ ha.

The rawdown$ assuming the porosity e?ual to*+ / is # = > - n A.

% % h Ri if h d d ill b 2 - d i h d (( -

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Agriculture emand 6 '0.1 M,'

" Desert

5ultivated Area 6 *++ ha

5rop Rotation

Crop Rotation T/pe

R( Rice and 8egetables *+"( 5itrus 9+

"* Apple 9+

Agriculture emand 6 . M,'

2.'.' Industr/

emand *+ Mm7

2.'. Annua# %ater De,and and A##o$ation

Total groundwater renewed 6 *1., Mm7.

The allocation of the volumes demanded from each resource was done preferably considering

the location of the user and the type water resource available 3river$ desert a?uifer or surface

t 4 Al it id d th i t l i i d t h th i i

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%nvestments %ndustry = ,.+9 Mmu

%nvestments Agriculture River = (.1Mmu

%nvestments Agriculture esert = +.7* MmuThe Benefits$ considering the unit price of +.( mu-year 3"W# and Agriculture4 and +.*

mu-year 3industry4 will be for each activity as shown bellow!

%n *+*+ ; the beneffits will be as follows!

!%S %nvestm3Mmu$bank4 *7.1

  Benefits3Mmu$bank  +.19,

Industr/ %nvestm3Mmu$bank4 ,.+9

  Benefits3Mmu$bank  (.99

A-ri$.Ri&er %nvestm3Mmu$bank4 (.1

  Benefits3Mmu$bank  +.,,

A-ri$.Desert %nvestm3Mmu$bank4 +.7*

  Benefits3Mmu$bank  +

2.'.+ So$ia# Aspe$ts

Water >uality 6 )T 6 part from groundwater part from surface water 3good ?uality4.

Water >uality 6 0T 6 part from groundwater part from surface water 3good ?uality4.

Employment ; 5onsidering the total amount of *,+ Mm7-y it is possible to provide

employment for ,+++ individuals.

Also$ considering the area of *++ ha$ 7++ persons can be employed.

2 ' E i t # A t

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The tables bellow presents the results of water allocation for different strategies.

*.9.( #trategy ( 6 *+(+

The main change in the #trategy ( is to increase the cultivated area in the desert to (,++ ha.

This change implies an increase in the demand for water in the desert a?uifer mainly.

Ta"#e Annua# %ater De,and and A##o$ation for 2010 Strate-/ 1.

Annual water demand and allocation Mm! "#$

PWS A%riculture Indu&tr# Total 'e(icit

  OldT NewT Vils River Desert  

SOURCES Sustained Demand: 2)*- /).! ,),, !*#" !!#&* /.),, $'#"!

Grw#renew# 01)*, Su((l) !),, *#** ,),, 0,)*+ ""#&" %#" +#&* "**

Grw#n-n.renew *#** Su((l) *#** /).! *#** *#** /.),, /0),, +,#'! +,#'!Sur/#water 0(i(eline1   418.00  Su((l)   1.59 0.00 0.00 409.83 5.99 0.59 "$#** *#**2Re.use drain 3"* *#** Su((l) 0.00    *#** *#**

 

T-tals &* All-4# #&, "#'! *#** !*#" !!#&* +*#** ,*#"! #'!

Th i t t i th d t l ill i ll th b fit Th d d i th

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Sur/#water 0(i(eline1   418.00  Su((l)   6.59 0.00 0.00  

407.2 

0 4.21 0.00   "$#** *#**2Re.use drain 3

"* *#** Su((l) 0.00    *#** *#** 

T-tals &* All-4# ,#&, +#+" *#** !*#" ',#"* +*#** &!"#!" $$"

The investments in the desert also will increase as well as the benefits. The draw down in the

a?uifer will increase$ because of the amount of water that have to be extracted from this

a?uifer. The River a?uifer also will have a drawdown$ because according to management

strategy used in the water allocation it was chosen to have a ?uasi e?uivalent drawdown in

 both a?uifers$ for environmental reasons. The drawdown in the desert and river a?uifer will be respectively$ +.1* and +.1+ meters- year.

The economic parameters will be better using strategy to than strategy (. The B-5 and %RR 

will be (.,*-*/.

*.9.7 #trategy 7 ; *+*+

&or the strategy 7 it was included the reuse of water of (+/. This factor changes mainly the

results in the drawdown in both a?uifers. The investments and benefits are in the same

magnitude as the strategy *$ also high.

&or the environmental point of view it is a good result$ because it reduces the total water 

volume to be extracted fro the a?uifers 3the total deficit for strategy 7 is * times less than for 

strategy *4.

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the reuse of more water implies less demand from the a?uifers4 and conse?uently the

drawdown would be less4.

Ta"#e ) Annua# %ater De,and and A##o$ation for 2020 Strate-/ .

Annual water demand and allocation Mm! "#$

PWS A%riculture Indu&tr# Total 'e(icit

  OldT NewT Vils River Desert  

SOURCES Sustained Demand: -)*- 0)0/ ,),, !*#" ',#"* 0,),, &!"#!"

Grw#renew# 01)*, Su((l) !),, *#** ,),, +)*, +*#** $#$* *#!* "+#$*

Grw#n-n.renew *#** Su((l) *#** 0),. *#** *#** /+)0* /,),, !*#!" !*#!"Sur/#water 0(i(eline1   418.00  Su((l)   6.59 0.15 0.00  

378.8 

6 30.85 1.20   "%#'' .*#!2Re.use drain 3"* !#* Su((l) 43.04   !#* *#**

 

T-tals $$#& All-4# ,#&, +#+" *#** !*#" ',#"* +*#** &!"#!" +#%%

*.9., #trategy , 6 *+*+

The change in the strategy , was accessed in the maximum cultivated area in the desert.

Taking in account the total area of the a?uifer and the thickness we compute the total volume

available in that a?uifer$ considering a effective porosity of *+/. By trying and error in the

spreadsheet the value for the area as changed in order to reach a value close to the total

volume available in the desert a?uifer. The maximum area that could be used is 9*++ ha and

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Annual water demand and allocation Mm! "#$

PWS A%riculture Indu&tr# Total 'e(icit  OldT NewT Vils River Desert  

SOURCES Sustained Demand: -)*- 0)0/ ,),, !*#" "$!#% 0,),, ',&

Grw#renew# 01)*, Su((l) !),, *#** ,),, +)*, &** $#** %#&* %#**

Grw#n-n.renew *#** Su((l) *#** 0),. *#** *#** -.)12 /,)+, "*,#'* "*,#'*Sur/#water 0(i(eline1   418.00  Su((l)   6.59 0.00 0.00  

378.8 

6 32.00 0.55   "$#** *#**2Re.use drain 3"* !#* Su((l) 43.04   !#* *#**

 T-tals $$#& All-4# ,#&, +#*' *#** !*#" "$!#% ",#!& '" "&'#'*

The conclusion by the analysis of the economic parameters tells us that it is not worth

increase the cultivated area of the desert$ since the investments will be high$ as well as the

 benefits$ but the B-5 has no significant changes.

will not change significantly.

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Appendix (

%OR4S5O! ON STRATE6IC !7ANNIN6   I5E8De#ft 200  

Bank rate (/ Base $ase Base $ase Base $ase Strate-/ 1 Strate-/2 Strate-/' Starte-/ Strate-/iscount rate (*/ *+++ *+(+ *+*+ *+(+ *+*+ *+*+ *+*+ *+*+

"W# l-c-d given 1+ 1+ 1+ 1+ 1+ 1+ 1+

"W# coverage given (++/ (++/ (++/ (++/ (++/ (++/ (++/

%ndustry3Mcm4 12.) 1+ 20 ( *+ *+ *+ *+Agr.River 5rop shift no /es yes yes yes yes yes yes

Agr esert3ha4 *++ *++ *++ 100 '000 '000 '000 ,a3Agr.es.cashcrops no no no no /es yes yes yes

Re;use no no no no no 10 2 2

Mm7  )T 7.,2$0T

+.:

)T 9.,:$0T

(.7

)T

:.,:$0T*.*(

)T 9.,:$0T

(.7

)T

:.,:$0T*.*(

)T

:.,:$0T*.*(

)T

:.,:$0T*.*(

)T

:.,:$0T*.*(Mm7   (*.2 ( *+ ( *+ *+ *+ *+Mm7   97(.29 97+.9( 97+.9( 97+.9( 97+.9( 97+.9( 97+.9( 97+.9(Mm7   9.91 9.91 9.91 77., :.( :.( :.( *7+.79Mm7   :.( ((. 99.7 *(.(2 2,.2( 9*.11 9*.11 *+*.2:

%nvestm3Mmu$bank4 (/ n.a 9.:* *7.1 9.,9 *7.1 *7.1 *7.1 *9.(9

Benefits3Mmu$bank (/ n.a +.(2-y +.19, +.(2-y +.19, +.19, +.19, +.19,%nvestm3Mmu$bank4 (/ n.a (.2* ,.+9 *.:7 *.:7 *.:7 *.:7 7.**

Benefits3Mmu$bank (/ n.a +.9-y (.99 +.9 (.99 (.99 (.99 (.99

%nvestm3Mmu$bank4 (/ n.a +.2 (.1 +.: (.1 (.1 (.1 7.(,Benefits3Mmu$bank (/ n.a +.,, +.,, +.,, +.,, +.,, +.,, +.,,

%nvestm3Mmu$bank4 (/ n.a +.*: +.7* **.21 9.:( 97.9 97.9 (.1(Benefits3Mmu$bank (/ n.a + + 79.:: :*.1* :*.1* :*.1* (7*.9

 0"8 3Mmu$disc4 (/ n.a + + ,.79 7,.+1 7:.* 7:.* ,*.9

B-5 D %RR (/ n.a + + (.(2-(:.2 (.,*-*/ (.,-*2.7 (.,-*2.7 (.-*2.,

Water ?uality )T