Surface Water Treatment Plant & Overhead Tank

Surface Water Treatment Plant & Overhead Tank
SWTP & OHT

Tuesday, April 23, 2013


Brief on proposed urban component under Bangladesh Rural Water Supply & Sanitation Project (GOB-IDA).




01.
Component
:
Water Supply, Sanitation, Drainage and Solid Waste Management for Small Size Pourashavas (Municipalities).

02.
Background
:
The Government of Bangladesh in emphasizing the importance of water supply and sanitation for protection of environment leading to improved health status and thus the sector is considered as the top priority one. The basic municipal services systems in newly created pourashavas which includes water supply, drainage, sanitation and solid waste management are not adequate to meet the public demand. So it is required to develop the piped water supply and other service systems in the pourashavas. The project is very relevant to the country’s sector development policy for water supply and sanitation sector.

At present total number of pourashava are 308 out of this 58 are district level, 217 are upazila level and 33 are growth centre level pourashava. Now 129 pourashavas have brought under piped water supply system. The present piped water supply coverage in the urban centers is 30%. Work has been going on in new pourashavas.

Arsenic contamination in groundwater is a serious problem and hindering the water supply system, which is mainly based on groundwater. Therefore alternate options for water supply are essential and are investigated in this project.

03.
Main Objectives and brief description of the component with justification
:

Objectives:


a)     Overall goal:

To improve the health and quality of life of the inhabitants of the small townships in Bangladesh, through providing improved infrastructure facilities in the sectors of water supply, sanitation, drainage and solid waste management. 

b)     Project/program purpose:

      (including the importance, necessity, and urgency of the project/program in the light of the current situation of the proposed sector)

·       To ensure safe drinking water (ground/surface) through piped water supply system and strengthen Pourashava water entity.

·       To step ahead for sustainable and environmental Sanitation.

·       To give relief from water logging, through development of the existing Drainage system.

·       For Hygiene promotion and improvement of Solid Waste Management system.

·       Establish a Management Information System (MIS) regarding tariff collection, Pourshava fund rising and for self sustaining of the system.

·       To develop the framework in case of involvement of PPP in the project at different levels (of water supply, drainage and waste management).

04.

Description:


:
Rural Piped Water Supply Scheme is one of the major components of Bangladesh Rural Water Supply and Sanitation Project (BRWSSP) which would be implemented in different upazilas of 33 districts through Bangladesh. Thirty (30) small size “C” category Pourashavas where piped water supply system is yet to be implemented and where inhabitants are facing severe scarcity of safe water have been considered to include under BRWSSP as “Urban Components”. These 30 Pourashavas have been chosen within the different upazilas of already selected 33 districts under BRWSSP so that zonal set up of DPHE personnel would be enough to implement the system under the guidance of BRWSSP. Infrastructure for water supply and sanitation facilities would be implemented in the core area of the selected Pourashavas where around 70% of the whole Pourashava people are believed to live in.

It may be noted that feasibility leading to full project preparation of the said 30 Pourashavas are being prepared under the TA Project of DPHE titled as “Groundwater Management and TPP for survey, Investigation and feasibility study in Upazila and Growth Center Level pourashava having no piped Water Supply System”. Hopefully, feasibility of these selected Pourashavas would be completed within June 2013.

It is expected that development partners will find the project feasible for financing, since water supply, sanitation and drainage bears the highest priority for the wellbeing of the people, as per government commitment and for achieving the targets of MDG (Millennium Development Goal). On an average, after project completion, each pourashava will cater the need for about 7000-21000 people (1400-4200 households).

05.
Relevance of the item with the short/ medium/long  term policies/plans/programs, etc.
:
National Policy For Safe Water Supply & Sanitation 1998 provides guidelines for urban water supply and sanitation. This policy describes detail instruction for the water supply and sanitation for the urban areas. Draft National Urban Policy- 2006, CDM (Clean Development Mechanism) and Recycling has been emphasized in this policy. So, the proposed programme will be helpful to achieve national policies and coverage as well.

06.
Relevance with other development programmes of the concerned sector
:
This project is complimentary to different water supply and environmental sanitation programme and will be helpful to meet the government target of universal water supply and sanitation coverage.

07.
Expected socio-economic benefits/ outputs
:
Pollution of environment will be controlled and will reduce water/sanitation related diseases by improving water supply and sanitation facilities in areas. This will improve the overall health status of the people of the project areas. This will also improve the working capacity and thus help economic development of the country.

08.
i) Estimated cost
:
Water Supply:                                         15 m. USD



Sanitation:                                                3 m USD



Drainage:                                                  5 m USD



Solid Waste Management:                       2 m USD



Total :                                                     25 m USD

ii) Nature of foreign assistance (loan/grant/others)
:
Grant.


iii) Details of proposed Pourashva
:
Details in Appendix-A (attached)

09.
Likely source of foreign assistance

:
IDA

10.
Any other relevant information
:
Research & Development programme will be required for some areas to develop the appropriate water and sanitation technology accepted in terms of technical and social aspect.


Overview of revised design and estimate of Kamarpara RPWSS under Bangladesh Rural Water Supply & Sanitation Project.

Kamarpara Rural Piped Water Supply Scheme, Jhikargacha Upazila, Jessore district was proposed to consist of three villages namely Kamarpara, Fatepur and Jafarnagar village under feasibility study (BETs) . But considering technical and financial point of view as per report submitted by the team (PMU team including technical consultant of WB visited the site), Kamarpara (288 HHs) village has not been considered for implementation of the scheme and decision has been taken to implement the proposed scheme in the two villages (Fatepur -366 HHs) and Jafarnagar- 466 HHs) instead of three villages.

Total households in Fatepur and Jafarnagar village are 832. But during preparation of road net work map for designing the distribution pipe line for the scheme, only 641 number households are found technically feasible to connect under this distribution net work. Remaining 191 number households are located in scattered area and far away (some cases there are no road to reach) from the distribution net work.  So, these 641 number households are considered as potential for the scheme. But as per previous experience and field visit report, it is revealed that maximum 70% of these existing households would take the house connection from the scheme in the first year of operation. So, 450 numbers (70%) house connection are included in the estimate of the scheme. Remaining connections would be done gradually in the following years of operation of the scheme. But, for design purpose projected population based on the existing 641 households are considered.

Calculation of water demand

Present HHs = 641 nos.  Population per HH (assume) = 5 nos.  Present populations = 3205 nos.
Considering population growth rate of 1.4% and 20 years project period, projected populations = 4232 nos. (Equivalent to 846 HHs)
Present water demand per day = 3205x65x1.15=239573.75 liters (Assume LPCD=65 liters, L&W=15%)
Projected (20years) water demand per day = 4232x65x1.15=316342.00 liters

Supply Hours

Considering availability of electricity, intermittent water supply in the scheme would be feasible. Total supply of water is considered 8 hours in a day (3+3+2).

Design of Over Head Tank

Capacity of the Over Head Tank has been considered 1/3 of the projected water demand in a day which would be very much adequate for the scheme.
Soil investigation report provided by the consultant has been followed during designing of the foundation of OHT. But, for technical reliability and soundness of the structure another soil investigation has been kept in the estimate of OHT. Before construction, soil investigation of the selected site would be carried out and based on the soil report foundation of OHT will be re-designed if required.
 
Production Well design

As per bore log and design provided by the consultant, production well has been designed. But, installation of another test tube well (TTW) has been kept in the estimate of the scheme to explore and know the actual sub surface formation of the site. Based on the report of TTW, final design of production well including pump will be done and accordingly will be installed.

Distribution Pipeline Network

Distribution pipe line network has been designed considering the projected water demand of the scheme.
Other components such as pump house, boundary wall, power supply, land development etc. have been designed as per requirement of the scheme.
The cost (capital) for different components of the scheme is shown in the following table.

SL #
Description of items
Quantity
Unit
Cost in Taka
1
38 mm dia. Test Tube Well (300 meter depth)
1
No.
60,490.00
2
200mmx150mm Production Well
2
No.
25,11,980.00
2
Submersible Pump
2
No.
10,78,364.00
3
Pump House including Office
1
No.
7,80,000.00
4
Over Head Tank (Capacity = 100 m3 )
1
No.
26,41,170.00
5
uPVC Distribution Pipe Line including all relevant fittings
150 mm dia.(B class)
62
meter
37,42,682.00
100 mm dia. (B class)
1897
meter
75 mm dia.  (C class)
5409
meter
6
House Connection
450
No.
18,00,000.00
7
Water Meter (wall mounted vertical type) including meter box chamber
450
No.
22,50,000.00
8
Boundary Wall including one MS Gate of        4 ft x7 ft size (Double leaf)
60
meter
2,41,100.00
9
Electric Connection (Electric poll, 3 phase transformer, energy meter, demand charge circuit breaker etc.)
1
item
5,40,000.00
10
Land Development
1
item
10,00,000.00

Total capital cost=
1,66,55,686.00

11
Social Development Officer for 18 months
15000.00/month
2,70,000.00
12
Formation of Community Based Organization
LS
30,000.00

Grand total=
1,69,55,686.00

Monthly Operation and Maintenance cost (O&M)

Following minimum cost (monthly) are considered to operate and maintain the scheme at sustainable manner.

SL#
Area of O&M cost
Unit
Nos.
Cost / month (TK.)
Amount in Tk.
1
Scheme Manager cum Accountant
Person
1
6,000.00
6,000.00
2
Pipeline mechanic cum bill collector
Person
1
5,000.00
5,000.00
3
Pump operator cum plumber
Person
1
5,000.00
5,000.00
4
Peon / MLSS
Person
1
3,000.00
3,000.00
5
Electricity bill
LS
20,000.00
20,000.00
6
Repair & maintenance including material and labour
LS
2,000.00
2,000.00
7
Testing of water quality
LS
1500.00
1500.00
8
Transportation
LS
1000.00
1000.00
9
Stationeries
LS
1000.00
1000.00
10
Depreciation
LS
4,000.00
4,000.00

Total cost per month =
48,500.00

Projection of House Connection

Through out 20 years of project period total number of house connections would be 841 nos. The scheme will be operating with 450 house connection from the first year of operation. It is assumed that within 10 years of operation 100% house holds would be connected under the pipe line distribution network of the scheme.  Tentative projection of house connection during the project period is shown below.  


Year of Operation

1
2
3
4
5
6
7
8
9
10
House Connection
450
500
550
600
650
700
750
800
841


Assessment of Community Contribution and Tariff Structure

A sample survey regarding willingness to pay has been conducted by PMU team. Pattern of community contribution as well as tariff has been analyzed and stated in the report which is attached herewith for ready reference.