5 - 43

5.3.4 The Assonora Water Supply Scheme (1) System Development Plan a. Expansion of the Treatment Plant The Assonora WTP has a capacity of 42,000m3/day. It currently receives 15,000 m3/day of treated water from the Podocem WTP, which is part of the Sanquelim WSS. It is proposed that an extra 8,000 m3/day of treated water will be supplied from the Podocem WTP to the Assonora WTP until 2012, as shown in Figure 53.16. This will result in a total transmission of 23,000 m3/day of treated water from the Podocem WTP to the Assonora WTP. However, when the expansion of the existing Assonora WTP is completed, the transmission volume from the Podocem WTP will be returned to the current 15,000 m3/day level. The existing plant, constructed in 1968, has a capacity of 12,000 m3/day. It is proposed that this plant be abandoned in 2012, due to its age and because a new plant is expected to be constructed by that time. Although the PWD has a plan of 40,000 m3/day augmentation, it is recommended that the plant capacity be expanded to 50,000 m3/day in 2012, to meet demand from the Assonora WSS.

ExistingPlant II30 MLD(1992)

Treated Waterfrom Podocem

WTP15 MLD

until 2012Present

Ex. Plant I12 MLD(1968)

Treated Waterfrom Podocem

WTP23 MLD

ExistingPlant II

30 MLD(1992)

Ex. Plant I12 MLD(1968)

ExistingPlant II

30 MLD(1992)

Treated Waterfrom Podocem

WTP15 MLD

ProposedPlant

50 MLDAbandoned

aftercompletion of

new plant

Supplementof 8 MLD

fromPodocemWTP until

2012

after 2012

57 MLD

65 MLD

95 MLD

Figure 53.16 Supply Capacity of the Assonora WTP

5 - 44

The relationship between the daily maximum water demand and the supply capacity for the Assonora WSS is shown in Figure 53.17.

0

20,000

40,000

60,000

80,000

100,000

120,000

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025

Year

Wat

er Q

uant

ity (m

3 /day

)

Day Maximum Water DemandSupply Capacity

Figure 53.17 Relationship between Daily Maximum Water Demand and Supply Capacity for the Assonora WSS

b. Transmission Plan The proposed transmission plan for the Assonora WSS in 2025 is shown in Figure 53.18.

5 - 45

15.0MLD

Bichilim Taluka

Tiswadi Taluka

Pernem Taluka

Bardez Taluka

Assonora WTP (80MLD)93.7MLD

Podosem WTP90.1MLD

3.7MLD

Figure 53.18 Transmission Plan for the Assonora WSS

(2) Treatment Plant a. Water treatment plant capacity The existing Assonora WTP has a capacity of 42 MLD, excluding the 15 MLD supplied from the Podocem WTP. It is recommended that the existing 12MLD plant, commissioned in 1968, be abandoned in 2012 due to its age. This will reduce the plant capacity from 42 MLD to 30 MLD. The master plan proposes that an extra 50 MLD of new water treatment capacity is required to address water shortages that are expected in 2025. Therefore, the plant capacity will increase from 42 MLD (12 MLD + 30 MLD) to 80 MLD (30 MLD + 50 MLD). According to the Water Resources Department, the water resource availability for the Assonora WTP is 250 MLD from the Tillari Canal, which is enough for the future expansion. b. Proposed Water Treatment process The proposed water treatment process for the new water treatment plant consists of contact aeration, a coagulation basin, flocculation/sedimentation, sand filtration and chlorination. This process was designed with consideration of the raw water quality and existing process conditions (See Figure 53.19).

Figure 53.19 Proposed Water Treatment Process at the Assonora WTP

5 - 46

c. Implementation Schedule The timeline for the implementation schedule of WTP is shown in Table 53.20. Rehabilitation and improvement of the existing water treatment plant will be conducted during Stage I. Installation of chlorine safety equipment, replacement of equipment that has exceeded its design life, and installation of a generator and flow meters will be conducted over this period. It is recommended that a new treatment plant with a capacity of 50 MLD is constructed during Stage I.

Table 53.20 Implementation Schedule for Assonora WTP

Stage Existing Plants New Plants

Stage I Components

- Installation of safety equipment

- Replacement of raw water pumps and

backwash pumps

- Installation of generator and flow

meters

- Modification of coagulation process

Expansion of 50 MLD plant

(3) Transmission System a. Proposed Transmission System To cover the future service areas and to meet the increased demand, the transmission system shown in Figure 53.20 and summarised in Table 53.21 is proposed. Calculations using WaterCAD are attached in Volume IV Appendix M53 Results of Hydraulic Analysis. Table 53.21 Proposed Transmission Mains for the Assonora WSS

Material Diameter (mm) Length (km)

500 5.00

400 4.00

250 7.20

200 6.05

150 10.50

Ductile Iron

100 0.90

Total 33.65

5 - 47

Pernem Taluka

Bardez Taluka

Tiswadi Taluka

Bichilim Taluka

14.3kW x 3 units,100m3 sump

φ400DI, 0.8km

Padi, 300m3

Existing Transmission Mains

Existing Reservoirs

Proposed Transmission Mains

Details of Proposed Transmission Mains

Proposed Reservoirs

Details of Proposed Reservoir, Location & Volume

Details of Proposed Pumping Stations

Legend

Boundary of Taluka

Proposed Proposed Pumping StationsP

Assonora WTP Existing: 30,000 m3/day Proposed: 50,000 m3/day

Advalpal, 300m3

Menkurem, 300m3

Sirigao, 300m3

Madel, 650m3

Power Grid, 150m3

Vinani, 300m3

Bastora, 800m3

Girim, 800m3

Saligao, 800m3

Arpora, 800m3

Assonora MBR, 10,000m3

Dangarwadi, 800m3

φ200DI, 1.7km

φ200DI, 3.3km

φ100DI, 0.9km

φ250DI, 0.5km

φ150DI, 0.5kmφ500DI, 5.0km

φ400DI, 4.0kmφ250DI, 2.9km

φ150DI, 3.7km

φ200DI, 0.35km

φ150DI, 0.4km

φ150DI, 3.6km

φ250DI, 1.5km

φ250DI, 2.3km

φ200DI, 0.7km

φ150DI, 2.3km

Figure 53.20 Proposed Transmission System for the Assonora WSS in 2025

N

S

EW

Not to scale

5 - 48

b. Rehabilitation of the Existing Transmission System The Master Plan recommends the replacement of 30% of old transmission pipes installed before 1975, which is an estimated length of 6.0 km, to secure the transmission system of the Assonora WSS. (4) Reservoirs a. Proposed Reservoirs To supply treated water to an expanded service area, construction of thirteen reservoirs (as listed in Table 53.22) is proposed. Locations and volumes of the proposed reservoirs are shown in Figure 53.20. Table 53.22 List of Reservoirs proposed for the Assonora WSS

Location Capacity (m3) Remarks

Assonora MBR 10,000 addition to the existing reservoir of 10,000 m3

Advalpal 300 -

Menkurem 300 -

Sirigao 300 addition to the existing reservoir of 50 m3

Dangarwadi 800 -

Madel 650 -

Power Grid 150 -

Vinani 300 -

Bastora 800 addition to the existing reservoir of 250 m3

Girim 800 addition to the existing reservoir of 150 m3

Saligao 800 addition to the existing reservoir of 800 m3

Arpora 800 addition to the existing reservoir of 150 m3

Housing Board Porvolim 650

b. Rehabilitation of the Existing Reservoirs The Assonora WSS has 85 reservoirs, as summarised in Table 53.23. A detailed list of the reservoirs is attached in Volume IV Appendix M31 Existing Water Supply System. Table 53.23 also identifies the reservoirs that need to be rehabilitated.

5 - 49

Table 53.23 Number of Existing Reservoirs Number of Reservoirs

Reservoir Volume (m3) Existing to be rehabilitated

2,000 & 3,000 2 0

800 & 650 18 4

250, 300, 350 27 5

150 29 6

100 and less 9 2

Total 85 17

Note: not include the reservoirs at Assonora WTP

(5) Pumping Station a. Proposed Pumping Station According to the Master Plan, the Assonora WSS does not require the construction of new pumping stations. b. Rehabilitation of the Existing Pumping Station The design life of the pumping equipment is assumed to be 15 years. Therefore the pumping equipment in all the existing pumping stations will need to be replaced by 2025. Details are shown in Table 53.24. Table 53.24 Pumping Equipment Replacement Details

Pumping Unit (pump and motor) Name of Station

Rated Output (kW) No. of Units

Mapusa 5.9 3

Socorro 4.7 2

Pundalik Nagar 2.3 3

Porvorim 5.0 3

Torda 10.3 3

P.D.A. Colony 33.4 3

(6) Distribution Pipeline and House Connections a. Proposed Distribution Pipeline and House Connections The proposed length of distribution pipelines was calculated by multiplying the number of house connections to be installed (which reflects the increase in population served) by the unit pipeline length per connection (which is 14.26m as mentioned in section 5.1.2). Table 53.25 shows the proposed number of house connections and length of distribution pipelines.

5 - 50

Table 53.25 Proposed Number of House Connections and Length of Distribution Pipelines in the Assonora WSS (incremental basis)

Year 2007 2008 2009 2010 2011 2012 2013 Distribution Pipeline (m) 16,648 16,941 17,286 17,610 17,966 18,293 18,660

Number of House Connection 1,167 1,188 1,212 1,235 1,260 1,283 1,309

Year 2014 2015 2016 2017 2018 2019 2020 Distribution Pipeline (m) 19,049 19,409 19,806 20,220 20,640 21,064 21,488

Number of House Connection 1,336 1,361 1,389 1,418 1,447 1,477 1,507

Year 2021 2022 2023 2024 2025 Total Distribution Pipeline (m) 21,474 21,930 22,393 22,839 23,336 377,055

Number of House Connection 1,506 1,538 1,570 1,602 1,636 26,442

b. Rehabilitation of the Existing Distribution Pipelines and House Connections The design life of the distribution pipelines is assumed to be 50 years. It is planned that 2 % of the existing 724km of distribution pipelines will be replaced every year. This will total 38 % from 2007 to 2025. As a result, the existing 275 km of distribution pipelines will be replaced with new pipelines during the 19 years from 2007 to 2025. The design life of the water meters at the house connections is assumed to be 10 years. It is planned that all 55,355 existing water meters will be replaced within 10 years. As a result about 116,500 water meters will be replaced during the 19 years from 2007 to 2025. (7) Summary of the Planning The components of the Assonora WSS master plan are summarised in Table 53.26. Figure 53.21 depicts the proposed Assonora WSS in 2025.

5 - 51

Table 53.26 Components of the Assonora WSS Master Plan

Facility Proposed Rehabilitation/ Replacement

Treatment Plant 50,000 m3/day 30,000 m3/day

Transmission Main 41 km 6 km

Reservoir 16 14

Pumping Station 1 2

Distribution Pipeline 377 km 275 km

House Connection 26,442 116,500

5 – 52

Mar

na, 1

50G

LR,

RL=

78.0

,H

WL=

82.0

, LW

L=78

.3Ti

vim

, 300

OH

R,

RL=

51.0

,H

WL=

80.0

, LW

L=76

.0

Acc

oi, 1

50O

HR

,R

L=47

.0,

HW

L=66

.0, L

WL=

63.0

15M

LD T

reat

ed W

ater

from

Pod

ocem

WTP

Ass

onor

a, 3

00G

LR,

RL=

80.0

HW

L=84

.0, L

WL=

80.3

Pirn

a, R

L=41

.0,

50, 1

50, 3

00G

LR,

HW

L=45

.0, L

WL=

41.3

Nad

ora,

50G

LR &

300

GLR

,R

L=48

.0,

HW

L=52

.0, L

WL=

48.3

Rev

ora,

75G

LR &

300

GLR

,R

L=49

.0,

HW

L=53

.0, L

WL=

49.3

Qui

tula

, 50G

LR,

RL=

47.0

,H

WL=

49.5

, LW

L=47

.3

Ald

ona,

50G

LR,

300G

LR, R

L=33

.46,

HW

L=37

.46,

LW

L=33

.76

Kho

rjuem

, 150

GLR

,R

L=29

.1,

HW

L=33

.1, L

WL=

29.4

Lakd

em, 3

00G

LR,

RL=

38.1

5,H

WL=

42.1

5, L

WL=

38.4

5

Moi

ra, 1

50O

HR

,R

L=47

.0,

HW

L=66

.0, L

WL=

63.0

Nac

hino

la, 1

50O

HR

,R

L=48

.45,

HW

L=67

.45,

LW

L=64

.45

Nac

hino

la, 3

00G

LR,

50O

HR,

RL=

25.2

,H

WL=

44.2

, LW

L=41

.2

Pom

burp

a, 1

50G

LR,

RL=

53.1

1,H

WL=

57.1

1, L

WL=

53.4

1

Ecox

im, 1

50G

LR,

RL=

38.1

5,H

WL=

42.1

5, L

WL=

38.4

5

Sala

i,80

0GLR

& 1

50G

LR,

RL=

56.4

2,H

WL=

56.7

2, L

WL=

60.4

2

Ass

agao

, 800

GLR

,R

L=48

.0,

HW

L=52

.0, L

WL=

48.3

Vag

ator

, 800

GLR

,R

L=40

.0,

HW

L=44

.0, L

WL=

40.3

Anj

una,

800

GLR

,R

L=49

.0,

HW

L=53

.0, L

WL=

49.3

Parr

a, 1

50G

LR,

RL=

42.0

,H

WL=

46.0

, LW

L=42

.3

Arp

ora,

RL=

50.0

,15

0GLR

,H

WL=

54.0

, LW

L=50

.3

Oxe

l, 30

0GLR

,R

L=49

.0,

HW

L=53

.0, L

WL=

49.3

Sodi

em, 3

00G

LR,

RL=

51.0

,H

WL=

55.0

, LW

L=51

.3

Cam

urlim

, 300

GLR

,R

L=48

.0,

HW

L=52

.0, L

WL=

48.3

Cuc

helim

, 150

GLR

,R

L=49

.0,

HW

L=53

.0, L

WL=

49.3

Siol

im, 8

00G

LR,

150G

LR, R

L=50

.0,

HW

L=54

.0, L

WL=

50.3

Bas

tora

, 250

GLR

,R

L=46

.0,

HW

L=50

.0, L

WL=

46.3

Uca

ssai

m, 3

00G

LR,

RL=

47.0

,H

WL=

51.0

, LW

L=47

.3

Pedd

em, 3

00O

HR

,R

L=50

.0,

HW

L=69

.0, L

WL=

66.0

Kho

rlim

, 300

GLR

,R

L=78

.0,

HW

L=82

.0, L

WL=

78.3

Ass

agao

, 150

GLR

,R

L=66

.0,

HW

L=70

.0, L

WL=

66.3

Map

usa,

RL=

85.0

300G

LR &

800

GLR

,H

WL=

89.0

, LW

L=85

.3

Map

usa,

2000

GL

R, R

L=7

5.0,

HW

L=7

9.0,

LW

L=7

5.3,

& 8

00G

LR

, RL

=80.

0,H

WL

=84.

0, L

WL

=80.

3

Hou

sing

Boa

rd, R

L=87

.0,

100O

HR

,H

WL=

106.

0, L

WL=

103.

0,30

0OH

R,

HW

L=10

7.0,

LW

L=10

3.0

Sils

aim

, 150

GLR

,R

L=48

.6,

HW

L=52

.6,L

WL=

48.9

Colv

ale,

150

GLR

,R

L=50

.0,

HW

L=54

.0, L

WL=

50.3

Col

vale

, 300

GLR

,R

L=48

.0,

HW

L=52

.0, L

WL=

48.3

Sinq

uelim

,80

0GLR

, RL=

48.0

,H

WL=

??.?

, LW

L=??

.?,

& 1

50G

LR, R

L=30

.0,

HW

L=??

.?, L

WL=

??.?

Can

dolim

, RL=

40.0

,15

0GLR

& 8

00G

LR,

HW

L=44

.0, L

WL=

40.3

Soco

rro, R

L=55

.0,

150O

HR

,H

WL=

74.0

, LW

L=70

.0,

150G

LR &

300

Sum

pH

WL=

59.0

, LW

L=55

.3 Tord

a, R

L=60

.080

0OH

R,

HW

L=84

.0, L

WL=

80.0

,&

300

GLR

, HW

L=64

.0, L

WL=

60.3

Porv

orim

, RL=

58.0

,15

0OH

R,

HW

L=77

.0, L

WL=

73.0

,&

800

GLR

,H

WL=

62.0

, LW

L=58

.0

Pile

rna,

150

GLR

, RL=

50.0

,H

WL=

54.0

, LW

L=50

.3

Alto

-Bet

im,

150G

LR, R

L=55

.0,

HW

L=59

.0, L

WL=

55.3

Pund

alik

Nag

ar, R

L=55

.0,

300O

HR

,H

WL=

74.0

, LW

L=70

.0,

& 3

00G

LR,

HW

L=55

.3, L

WL=

59.0

Secr

etar

iate

Com

plex

0.2M

LD

Ver

em,

250G

LR, R

L=70

.0,

HW

L=74

.0, L

WL=

70.3

Ner

ul,

150G

LR, R

L=55

.0,

HW

L=59

.0, L

WL=

55.3

Cal

angu

te, 8

00G

LR,

RL=

30.0

,H

WL=

34.0

, LW

L=30

.3

Cal

angu

te, 1

50O

HR

,R

L=25

.0,

HW

L=44

.0, L

WL=

40.0

Ass

onor

a M

BR

4×80

0,m

3, 5

,000

m3,

RL=

120.

00

Men

kure

m(P

ropo

sed)

300G

LR

, RL

=42.

0

Adv

alpa

l(Pro

pose

d)30

0GL

R, R

L=48

.0,

Usa

p, R

L=41

.0,

800G

LR,

HW

L=41

.3, L

WL=

45.0

Ass

onor

a W

TP(4

2MLD

)

Ass

onor

a R

iver

Sirig

aoR

L=51

.0,

50G

LR,

HW

L=55

.0, L

WL=

51.3

Cans

a-B

odie

m, 5

0GLR

,R

L=46

.8,

HW

L=49

.3, L

WL=

47.1

Dan

garw

adi(P

ropo

sed)

,80

0GL

R, R

L=6

1.0

Chi

calim

, 150

GLR

,R

L=50

.0,

HW

L=54

.0, L

WL=

50.3

Vin

ani(P

ropo

sed)

,30

0GL

R,R

L=5

0.0

Pow

er G

rid(

Prop

osed

),15

0GL

R,R

L=3

5.0

Ver

la-C

anca

, 150

GLR

,80

0GLR

, RL=

65.0

,H

WL=

69.0

, LW

L=65

.3

Map

usa,

150

OH

R,R

L=85

.0,

HW

L=10

4.0,

LW

L=10

1.0

Gui

rim15

0GLR

, RL=

42.0

, H

WL=

46.0

, LW

L=42

.3,

650O

HR

, RL=

42.0

,H

WL=

71.0

, LW

L=68

.0

Sang

olda

, 300

GR

L,R

L=48

.0,

HW

L=52

.0, L

WL=

48.3

Salig

ao, R

L=48

.0,

800G

LRH

WL=

52.0

, LW

L=48

.3

Map

usa,

RL=

67.0

,65

0GLR

& 6

50G

LR,

HW

L=71

.0, L

WL=

67.3

P.D

.A. C

olon

y,30

00G

LR, R

L=80

.0,

HW

L=84

.0, L

WL=

80.0

25M

LD R

aw W

ater

from

Pod

ocem

Inta

ke (R

aw W

ater

Res

ervo

ir)

LEG

END

Wat

er T

reat

men

t Pla

ntM

BR

(Mas

ter B

alan

cing

Res

ervo

ir)G

LR (G

roun

d Le

vel R

eser

voir)

/OH

R (O

ver H

ead

Res

ervo

ir)Tr

ansm

issi

on M

ain

M

ain

Dia

met

er D

350

mm

Lin

e

Mai

n D

iam

eter

D40

0 m

m L

ine

M

ain

Dia

met

er D

700

mm

Lin

e

Mai

n D

iam

eter

D11

00 m

m L

ine

M

ain

Dia

met

er D

1200

mm

Lin

e (P

umpi

ng M

ain)

M

ain

Dia

met

er D

300

mm

Lin

e (to

Bic

holim

Tal

uka)

P

ropo

sed

Tran

smis

sion

Mai

n

Arp

ora,

RL

=50.

0,80

0GL

R(P

ropo

sed)

Salig

ao, R

L=4

8.0,

800G

LR

(Pro

pose

d)

Bas

tora

,RL

=46.

0,80

0GL

R(P

ropo

sed)

Siri

gao

RL

=51.

0,30

0GL

R(P

ropo

sed)

φ20

0DI,

1.7k

m

φ20

0DI,

3.3k

m

φ1

00D

I, 0.

9km

φ25

0DI,

0.5k

m

φ150DI, 0.5km

φ50

0DI,

5.0km

φ250

DI, 2.9k

m

φ15

0DI,

3.7k

m

φ40

0DI,

4.3k

mφ

200D

I, 0.

35m

φ15

0DI,

0.4k

mφ150DI, 3.6km

φ25

0DI,

1.5km

φ25

0DI,

2.3km

φ15

0DI,

2.3k

m

φ20

0DI,

0.7k

m

Tivi

m ID

C, 1

50O

HR

,R

L=50

.0,

HW

L=69

.0, L

WL=

66.0

Mad

el(P

ropo

sed)

,65

0GL

R, R

L=4

8.0

Vad

dem

, 150

GLR

,R

L=50

.0,

HW

L=54

.0, L

WL=

50.3

Gui

rim

RL

=42.

0, 8

00G

LR

(Pro

pose

d)

Ola

ulim

, 150

GLR

,R

L=66

.0,

HW

L=70

.0, L

WL=

66.3

Hou

sing

Boa

rdPo

rvol

im65

0OH

R(P

ropo

sed)

Ass

onor

a M

BR

(Pro

pose

d)10

,000

GL

R, R

L=1

20.0

,

Figure 53.21 Proposed System for the Assonora Water Supply Scheme in 2025

N S

EW

02

km4

km6

km