Study of Water Supply-PT.Freeport Indonesia

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Gadjah Mada University | The Design Activity and methodology 1

Study of Water Supplyin Ridge camp PT.Freeport Indonesia

LPPM UGM and PT Freeport Indonesia

2010

Gadjah Mada University

11/1/2010



Gad jah Mada Unive

sity | The Design Activity and methodology 2

Background

Ave

age wate

consumption in Ridge Camp area PT Freeport Indonesia is currently above

800 liter per day per capita well above the normal standards which is 300 Liter per day per

capita. Load of waste water in Sewage Treatment Plant (STP) over of its hydraulic capacity.

In the other hand, water supply is declining precipitously when rainfall decreases.

Objective

Survey and study of water consumption in the Ridge Camp area of PT. Freeport Indonesia

for the three main sub-areas:

- domestic (Barrack),

- commercial (shopping HERO & Coff ee Shop KOKARFI), and

- industrial (office, shop & messhall)to investigate and calculate water consumption per capita, determine the rate of water

losses in the distribution units and gives appropriate and practical recommendations for

water savings according to standard that should be, and alternative solution in case of

decreasing the water supply in dry season

Scope

Water from the Water Treatment Plant (WTP) supplies for individual purposes at barrack

area, commercial area & industrial area through underground piping. The study is expected

show appropriate and practical recommendations for water savings according to the

conditions, infrastructure and existing resources.



Gad jah Mada University | The Design Activity and methodology 3

Grand Scheme of Water Supply Study

in Ridge Camp Area PT. Freeport Indonesia

(LPPM UGM-PT. Freeport Indonesia)

1st Priority

Real Demand Base

Study and

retrenchment

2nd Priority

Water Losses Base

Study and

controlling

3rd Priority

Source of water

Reliability Study

and Water Balance

Analysis

Water resources

Conservation

Programme

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©

Figure 1. Grand Scheme of Water Supply Study

in Ridge Camp Area PT. Freeport Indonesia




Scheme of Water Supply System (Typical)

Industrial (office,

shop & messhall)

Komersial (Shopping HERO

& coff ee shop KOKARFI)

Domestic

(Barrack)

Sewage Treatment

Plant(STP)

W a t e r E x t a c t i o n

Back up system

Elevated

Tank

Reuse

Water

Treatment Plant

(WTP)

8 9 10

4

7

6

5

2

A B C

11

3

1

Figure 2. Scheme of Water Supply System




Real Demand Survey

Main line activity. Its real demand study to identif y efficient volume of

water consumption and factors aff ecting demand pattern. Survey will be

conducted by interviewing, observation and collecting data relating water

consumption both in quantity and pattern/allotment. Approachment Framework of study

display in Figure 3

Secondary/primary data requirement for Priority Number two. Its optional

case ad just requirement for f urther analysis especially water losses base

study and controlling. The following is a methodology that can be applied

after obtaining a blue print of water supply system. Technical data such as map the situation and

complete scheme with the specifications of pipes, pumps, WTP, etc. and tests/measurement

used to determine the steps that may be performed according to the conditions, infrastructure

and existing resources as shown in Figure 2 and Approachment Famework of study in

APPENDIX1.

Activity for Priority Number three called source of water Reliability Study

and Water Balance Analysis also optional activity. Topographic map,

hydrological and geo-hydrological data of the location (site) include the

watershed used to determine the steps that may be performed according to the conditions,

infrastructure and existing resources as shown in Approachment Framework of study in

APPENDIX 2. Reliability of quality, quantity and continuity analysis will be conducted to

determine the capacity of production and treatments. Water balance analysis will be conducted

to determine the possibility of excess water with a dependable flow of watershed for surface

water sources and the saf e yield for groundwater sources.

AB

C

1 11




Approachment Framework

Real Demand Base Study and Retrenchment

(1st

Priority)

y decreasing the supply of water in dry season

y Load of waste water in Sewage Treatment Plant

(STP) over of its hydraulic capacity

Water Demand

Approaches

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Analysis

Figure 3. Framework of Real Demand Base Study and Retrenchment




The Design Activity and Methodology

A. Activities and Schedule

1. Pre Survey

- Preparation of Contract

- Collecting Data

- Q uestionnaire Preparation

2. Preliminary Survey (3 Days)

1st

Day

- Presentation and Introduction Team

- Learning the Operational Scheme of Water Distribution

- Orientation and Field Trial Q uestionnaire

- Evaluation Activities

2nd

Day

- Interviews in 3 Regions (Barrack, Commercial, Industrial)

- Secondary Data Collection


3rd

Day

- Initial Report and Presentation

- Back to Yogyakarta

3. ImplementationSurvey (5 Days)

1st

Day

Presentation of operations to be performed

2nd

Day

Interviews and observation in 3 Regions (Barrack, Commercial, Industrial)

3rd Day


4th

Day


Analysis Data

5th

Day

Interim Report and Presentation

Back to Yogyakarta

4. Reporting (3 Days)

1st DayAnalysis Report

2nd

Day

Analysis Report and Draft Final Report

3rd

Day

Finalization, binding and Delivery




B. Methodology

Primary Data

Point 1 -11* (Interview,

Observation and

check list data)

Collecting Data

Preparation

Study

Start

Secondary Data

Secondary Data: 1. Grand scheme of water supply

system

2. Water treatment Installation

(domestic, non domestic)

3. demand

4. Other supporting data

Analysis

Conclusions And

Recommendations

Finish* Optip

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Figure 4. Methodology Study




C. Time Schedule

- Survey will be conducted in end of November 2010

Table 1. Time Schedule

No Activity Day

Coor dinator 1 2 3 4 5

A Preliminary Survey

- Presentation and Introduction Team

- Learning the Operational Scheme of

Water Supply

- Orientation and Field Trial

Q uestionnaire


RB

- Interviews in 3 Regions (Barrack,

Commercial, Industrial)

- Collecting Secondary Data


AW

- Initial Report and Presentation

- Back to Yogyakarta

LS, DP

B Implementation Survey

Presentation of operations to be

performed

Interviews and observation in 3Regions (Barrack, Commercial,

Industrial)

Interviews and observation in 3

Regions (Barrack, Commercial,

Industrial)

Interviews and observation in 3

Regions (Barrack, Commercial,

Industrial)

Interim Report and Presentation

Back to Yogyakarta



APPENDIX 1


Water Losses Base Study and Controlling

(2nd

Priority)

y L k f v il bilit f l w t th

y

t w t lti i

xpl it ti

f x iv w t

Water Losses Approach

Primary Data and

Secondary Data Survey

Grand Scheme of distribution

system, analytical result and

technical specifications of raw

water units, production units

(WTP), distribution units and

service units

Drafting Network diagram Capacity and pressure

estimation

Analysis, observation, on site measurement

and/or virtual testing (simulation)

The level of water losses

Recommendations to encourage management

treatment of water supply consumption patterns

and physical infrastructure rehabilitation.

The critical points of water losses

Discharge, pressure, pipe

diameter, pipe type, pipe

age, water quality,

elevation, completeness of

pipe accessories, etc

Checking Watermeter

Monitoring Preparation

(zoning system)

Analysis



APPENDIX 2


Source of Water Reliability Study

(3rd

Priority)

L k f v il bilit f f h w t th j k

Primary and

Secondary Data

H j l l D t

G -h j l l i l j t

m pographi Map

Surface Water Ground Water

- A k al z ondary data and on it t t th

reliability of qn antity, qn ality and ontinuity;

and

- water balance analysis

Production Capacity and treatmentmethod

Development and interconnection of networks and

management r ecommendations

Character istics of water soure

Analysis

Documents

Study of Water Supply-PT.Freeport Indonesia