rain water harvesting in ministers quarter complex

Rainwater Harvesting For Ministerial Quarters, Pulchowk, Lalitpur

Table of Contents

EXECUTIVE SUMMARY II

CHAPTER - I : INTRODUCTION AND BACKGROUND1.1 BACKGROUND 11.2 OBJECTIVES 11.3 SCOPE OF CONSULTING SERVICES 11.4 NEED OF THE PROJECT 21.5 METHODOLOGICAL APPROACH 21.6 LITERATURE REVIEW 3

1.6.1 RAINWATER HARVESTING (RWH) 31.6.2 STATUS OF RAIN WATER HARVESTING IN NEPAL 31.6.3 GOVERNMENT POLICY 4

CHAPTER – II : ASSESSMENT OF EXISTING SCENARIO2.1 PHYSIOGRAPHIC SETTINGS 52.2 LAND USE 52.3 NEED OF RAINWATER HARVESTING 5

1.3.1 NEED OF RAINWATER HARVESTING 51.3.2 EXISTING PROBLEMS OF WATER 61.3.3 KNOWLEDGE ABOUT THE PRESENT INITIATIVES 6

CHAPTER – III : RAINWATER ANALYSIS AND DESIGN3.1 GENERAL 73.2 ESTABLISHMENT OF DESIGN PARAMETERS AND CRITERION 73.3 RAINWATER HARVESTING SYSTEM DESIGN 83.4 COMPONENTS OF RAINWATER HARVESTING SYSTEM 8

CHAPTER – IV : QUANTITY AND COST ESTIMATE4.1 BASIC COST 104.2 RATE ANALYSIS 104.3 OVERHEAD, PROFIT AND TAXES 104.4 ABSTRACT OF COST 10

1.3.4 OPTION – 1: : USING 25,000 LTR RCC/BRICK WATER TANK (RECOMMENDED OPTION) 10

1.3.5 OPTION – 2: USING 5,000 LTR PVC WATER TANK (For Comparison Purpose only) 11

CHAPTER – V : FUTURE ACTION PLAN5.1 LIMITATION OF THE STUDY 135.2 RECOMMENDATION AND CONCLUSIONS 13

ANNEX: ABSTRACT OF COST, BOQs, RATE ANALYSIS, & DRAWINGS

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EXECUTIVE SUMMARY

This report is the result of Rainwater Harvesting System (RHS) designed for Ministers’ Quarters at Pulchowk, Laltipur.

The Kathmandu valley has been subjugated under the severe shortage of water supply for a long time, and the main water supply unit, KUKL has not been able to satisfy the growing demand.

Both public and governmental institutions are forced to search for alternative sources of water supply to reduce the water demand-supply deficit.

Rainwater Harvesting is considered to be one of the appropriate and cost-effective alternative technologies to reduce the water shortage crisis of the valley.

The objective of the project is to reduce the water demand-supply shortage currently faced by the quarters of Ministers’ Complex by implementation of Rainwater Harvesting (RWH) as a alternative technology, and also to make an example of the usage of cheaper and alternative technology like RWH to solve the current water supply problem for the rest of the country

The Ministerial Quarters at Pulchowk, Lalitpur is facing the problem of insufficient water supply as per their demands and, the current water supply from the main line of KUKL has been insufficient and unreliable to meet the water demand of the complex.

The Building Construction and Maintenance Division office of DUDBC under the Ministry of Physical Planning and Works decided to implement the alternative technology of Rainwater Harvesting (RWH) in the complex to reduce the water demand-supply deficit.

The approach to the task has been methodically accessing the secondary data mixed with a site visit to analyze the prevailing problem and design a cost-effective and efficient implementation plan for Rainwater Harvesting System in the site.

Rainwater harvesting is being used and studied over the various part of the world and proven as reliable, dependable and safe source of water for drinking water supply.

The site follows the generic gradient of Patan area sloping from south to north.

The buildings cover 16.9% (approx.) of the total area of the site.

The only source of water supply in the complex is the main supply line of KUKL. But, it is unable to meet the demand of water in the complex.

After studying the essential raw data like the water demand, available catchment area, annual rainfall data, the intended end use of collected water, slope of land, etc. collected from secondary sources, the design parameters such as size of storage tank, the location of the tank, the type and size of the filtration plant, etc. are established, which ultimately results in the design of the Rainwater Harvesting System (RHS) to be implemented in the given site.

Rainwater collected in catchment areas, i.e. roof or terraces, is transported through gutters and pipes to a storage tank. Gutters (channels installed around the edge of roofs) transport water to pipes leading to a storage tank.

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CHAPTER - I: INTRODUCTION AND BACKGROUND

1.1 BACKGROUND

The Kathmandu valley has been subjugated under the severe shortage of water supply for a long time now. The current water supply system of Kathmandu Upatyaka Khaneypani Limited (KUKL), the major water supply unit of the country, has not been able to satisfy the ever growing demand of the city. The inefficiency and inability of this major supply unit has not only distressed the general public, but the government bodies have been equally victimized.

On the grounds of this uncertainty and unreliability of water supply, a major ingredient of regular life, everyone is forced to look out for alternate technologies to fulfill the water demands in individual and organizational level.

Rainwater Harvesting (RHS) would be the best alternative technology to suffice water supply system currently being operated. Rainwater Harvesting System (RHS), a system of collecting rain water, filtering it and storing it for future usage has been successfully implemented in other parts of the world besides Nepal to ease the water demand-supply shortage.

1.2 OBJECTIVES

With the implementation of cheaper and alternative technology like Rainwater Harvesting (RWH) to reduce the water demand-supply shortage, the Ministry of Physical Planning and Works is attempting to make itself an example and act as a visionary for the rest of the general public, organizations and other government institutions, all those who share the same water supply issue.

Based on afore mentioned light, the objectives of this project are as follows:

i. To reduce the water demand-supply shortage currently faced by the quarters of Ministers’ Complex by implementation of Rainwater Harvesting (RWH) as a alternative technology.

ii. To make an example of the usage of cheaper and alternative technology like RWH to solve the current water supply problem for the rest of the country

1.3 SCOPE OF CONSULTING SERVICES

The scope of consulting services is as follows:

i) Site AnalysisThis includes the study of the site for the implementation of the project, taking required measurements, accessing the current situation, and observing and identifying available resources.

ii) Detail Design of Rainwater Harvesting System (RHS)

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Based on the site analysis, it includes the detail drawings of all required components of Rainwater Harvesting System and a master plan of the system.

iii) Cost EstimationThis includes the cost estimates, as per the designs, for the implementation of the project.

1.4 NEED OF THE PROJECT

As the rest of the valley, the Ministerial Quarters at Pulchowk, Lalitpur is also facing the afore elaborated problem of insufficient water supply as per their demands. The current water supply from the main line of KUKL has been insufficient and unreliable to meet the water demand of the complex.

The implementation of an alternate technology to solve this water shortage issue has been a must for this complex. And, RWH is the cheap and best alternative solution for the problem.

As a resort to solve this water demand-supply shortage in the quarters, the Building Construction and Maintenance Division office of DUDBC under the Ministry of Physical Planning and Works decided to implement the alternative technology of Rainwater Harvesting (RWH) in the complex.

Rainwater Harvesting System (RHS) might not solve this issue completely, but it will definitely help ease the water demand-supply shortage. Based on this reasoning, this project has been envisioned.

1.5 METHODOLOGICAL APPROACH

The consultant’s approach to the task has been methodically accessing the secondary data mixed with a site visit to analyze the prevailing problem and design a cost-effective and efficient implementation plan for Rainwater Harvesting System in the site. Accordingly, as indicated in the scope of the study above, the entire task in hand has been divided in four phases, namely:

Establishment of Present situation from data collection (explicitly secondary data) and site visit. Considering that several critical information are needed for designing an effective and efficient Rainwater Harvesting System, following data were collected directly from DUDBC.

Rainfall data Building plans and elevations, Master plan etc. Existing drainage system

Other relevant information Assessment and Analysis of Existing Situation: this part will deal with the

assessment of the existing situation, available of land for various components of Rain Water harvesting System and analysis of the system suitable for the local setting at disposal.



Implementation Design for Rainwater Harvesting System (RHS) based on the analysis mentioned above. This will be presented with all the required detail components and its drawings.

Cost estimation for the implementation of RHS Future plans, if necessary, for the system in design.

1.6 LITERATURE REVIEW

There is a fair amount of literature, which summarizes the experience history, and practice of Rainwater Harvesting System (RHS) in Nepal and abroad. Many of such publications/documents were pursued and relevant recommendations were considered.

1.6.1 RAINWATER HARVESTING (RWH)Rainwater harvesting is being used and studied over the various part of the world and proven as reliable, dependable and safe source of water for drinking water supply. The main principle of the rainwater is collecting water in period of rainfall, store the water and use water in need.

The objective of rain water harvesting is to make water available for future use and meet the household needs. Among others, some of the advantages of rain water harvesting might be as follows:

i) It provides self sufficiency to water supplyii) It provides high quality water, soft and low mineralsiii) The system is less expensive and less expensive which can be adopted by individualsiv) In the hilly terrain, rain water harvesting is preferred for adoption

Rain water harvesting comprises of various components such as roof catchment, gutters to transport water, pipes (Inlet, Overflow, Outwash and water tap etc), filter unit, storage tank. Among the above components, storage tank is the most expensive and critical component and the capacity of the storage tank determine the cost of the system.

1.6.2 STATUS OF RAIN WATER HARVESTING IN NEPAL

In recent years collection of rainwater for domestic use has been promoted in Nepal by various agencies. The Department for Water Supply and Sewerage has produced some technical guidance on application and construction of rainwater systems, and several other sector agencies and NGO partners have followed suit (RWSSP-Finnida, Helvetas, NEWAH, Rural Water Supply and Sanitation Fund Board, Biogas Support Programme and the NGO Forum for Urban Water Supply and Sanitation). In the process, experience has been gained in suitable technical, social and financial aspects of rainwater harvesting. Currently it is estimated that over 11000 systems are in use in the hill districts of Nepal. A recent survey reported that around 78% of the users were satisfied with the service (Laia Domenech, MPPW & WHO-Nepal, and November 2008). It can be concluded therefore that some 47’000 people are getting a satisfactory service out of rainwater harvesting, often in water stress areas (uphill areas in Kaski, Tanhu, Doti, etc. The Department of Urban Development and Construction has been working since early 2006 on promotion of rainwater harvesting in the urban areas. This effort is supported by UN-Habitat, NGO Forum for Urban Water Supply and Sanitation, ENPHO, Lumanti, etc.



DUDBC has just produced a final draft of the RWH Guidelines which are to be used to guide municipal authorities and those engaged in the building trade. The focus of the guidelines is on collecting safe water for domestic purposes, conservation of water in the urban setting and management of drainage and flooding.

1.6.3 GOVERNMENT POLICY

The policies of the Government of Nepal aim to provide an adequate basic supply of safe drinking water to all its citizens. The methodologies of ensuring such access have been laid down in various government documents which guide the water supply development activities of government and NGOs. In some instances coverage is not possible or sustainable using groundwater or surface water as households may be situated at an elevation that makes the supply of water within a reasonable distance from the household impossible, or because the quality of the water is compromised by chemicals such as arsenic. In such instances, project authorities may consider supporting a domestic or institutional rainwater harvesting system.

Rainwater is a valuable resource, which should be exploited in the most efficient way to protect the people's health and livelihood. To ensure good utilization and conservation of water resources, the Government of Nepal has prepared a policy on rainwater harvesting to promote suitable developments in rainwater harvesting for human consumption and domestic use, and facilitate guidance and capacity building.

The policy aims to• foster optimum utilization of rainwater to cater for the needs of rural and urban households that face shortages of water for daily use; • stimulate development of technical and financial solutions to effective rainwater harvesting in domestic and institutional settings;• provide an enabling framework for local government and ngos to encourage and facilitate application of rainwater harvesting in all suitable situations.

Thus, the Ministry of Physical Planning and Works, with its departments; and in collaboration with the Ministry of Local Government, will promote the application of rainwater harvesting through support for research, piloting and evaluation of all relevant aspects of the rainwater harvesting chain. To that end the Ministry will encourage its departments, NGOs, universities and the private sector to develop and test suitable technologies and approaches.Rainwater Harvesting has gradually been gaining interest in both the urban and rural areas. To further raise the capacity in Nepal, the Ministry of Physical Planning and Works has consulted stakeholders and has drafted a concept for a Policy on Rain Water Harvesting.



CHAPTER – II: ASSESSMENT OF EXISTING SCENARIO

2.1 PHYSIOGRAPHIC SETTINGS

The site under consideration is located at Harihar Bhawan, Pulchowk Lalitpur, next to the UN Building. The site follows the generic gradient of Patan area sloping from south to north.

2.2 LAND USE

The site covers an approximate area of 71-11-0-1 (36472 sq. m.). Out of the total area 16.4% (approx.) is covered by road and walkways while the buildings cover 16.9% (approx.) of it. The remaining area covers three specifically allocated open space, a proposed building construction area, a proposed temple area, open area around individual buildings, greenery and flowerbed, etc.

Majority of the existing buildings were build during 1970s and new buildings were constantly added as per the necessity over time. Some are still being constructed, while some still wait for the initiation.

2.3 NEED OF RAINWATER HARVESTING

2.3.1 NEED OF RAIN WATER HARVESTING

Rainwater harvesting is the gathering, or accumulating and storing, of rainwater. Rainwater harvesting has been used to provide drinking water, water


http://en.wikipedia.org/wiki/Drinking_water


for livestock, water for irrigation or to refill aquifers in a process called groundwater recharge. Rainwater collected from the roofs of houses, tents and local institutions, or from specially prepared areas of ground, can make an important contribution to drinking water. In some cases, rainwater may be the only available, or economical, water source. Rainwater systems are simple to construct from inexpensive local materials, and are potentially successful in most habitable locations. Roof rainwater is usually of good quality and does not require treatment before consumption. Household rainfall catchment systems are appropriate in areas with an average rainfall greater than 200mm per year, and no other accessible water sources (Skinner and Cotton, 1992).

In the present Project, the lack of sufficient supply as per the demand of the complex is the major necessity of an alternative technology to breach the water supply demand-supply shortage, which is not being able to satisfy the demands of the existing occupants with the available supply. The next context to this project is to initiate a more sustainable solution to tap the free supply of water coming as rain, and available at a onetime investment. In this context, Rainwater Harvesting (RWH) would be the appropriate technology to implement for cost-efficient and effective alternate of water source.

Further, this problem being the prevalent condition in the rest of the valley as well, the easy implementation, cost-efficient and easy replication nature of the technology, makes it the appropriate choice.

2.3.2 EXISTING PROBLEMS OF WATER

Currently, the only source of water supply in the complex is the main supply line of KUKL. But, it is unable to meet the demand of water in the complex. And, water being an integral ingredient of daily life for any individual, the Minister’s Quarter is struggling to meet it’s water demands. The lack of alternative source of water makes it more difficult to meet the demand and at times become very expensive, if water has to be purchased from the private water suppliers. This water shortage problem has made the relevant government body to take an initiative in implementing a cheaper alterative technology to solve this problem.

2.3.3 KNOWLEDGE ABOUT THE PRESENT INITIATIVES

The Ministry of Physical Planning and Works has realized of the necessity of alternate technology for meeting the water supply demand. And, their understanding of the cost-effectiveness and benefits of Rainwater Harvesting (RWH) has evidently led to the creation of this project.


http://en.wikipedia.org/wiki/Groundwater_recharge

http://en.wikipedia.org/wiki/Groundwater_recharge

http://en.wikipedia.org/wiki/Aquifers

http://en.wikipedia.org/wiki/Irrigation

http://en.wikipedia.org/wiki/Livestock


CHAPTER – III: RAINWATER ANALYSIS AND DESIGN

3.1 GENERAL

Once the raw data is collected from the site and secondary sources, it is analyzed to establish the design parameters and criteria. The essential raw data are the water demand, available catchment area, annual rainfall data, the intended end use of collected water, slope of land, etc. After studying these raw data, the experts establish the design parameters such as size of storage tank, the location of the tank, the type and size of the filtration plant, etc. which ultimately results in the design of the Rainwater Harvesting System (RHS) to be implemented in the given site.

The design of the system includes the detailed design of the components of RHS, their locations, etc. and is meticulously assessed to utilize the available resources and land for constructing and using the system in most cost-effective and efficient way possible.

3.2 ESTABLISHMENT OF DESIGN PARAMETERS

The first step of designing Rainwater Harvesting System (RHS) is to assess the demand of water, the volume of water that can be captured and, the intended end use of the collected water. The variables of rainfall and water demand determine the relationship between required catchment area and storage capacity.

The potential of rainwater collection, being one of the important criteria for the design, was calculated. The total amount of rainwater that can be collected from all the blocks of the complex was calculated to be 6,146, 284.48 liters annually.

Sn Building TypeNumber of Blocks

Annual Rainwater collection of individual Blocks

Potential connection (80%) of Individual Block

Total Amount of Rainwater Collection (lt) Annually

Highest month (july)Collection of individual block (Lt)

Lowest Month (Dec) Collection of individual block (Lt)

1 Building A 5 371,378.70 297,102.96 1,485,514.80 83,041.20 1,384.022 Building B 4 370,300.00 296,240.00 1,184,960.00 82,800.00 1,380.003 Building C 5 370,300.00 296,240.00 1,481,200.00 82,800.00 1,380.004 Building D 4 314,030.50 251,224.40 1,004,897.60 70,218.00 1,170.30

5Canteen Block( inside) 1 203,665.00 162,932.00 162,932.00 45,540.00 759.00

6 APF building block 1 86,473.10 69,178.48 69,178.48 19,335.60 322.267 BCMDO Block 1 284,970.00 227,976.00 227,976.00 63,720.00 1,062.008 Army Quarter Block 1 473,662.00 378,929.60 378,929.60 105,912.00 1,765.209 Store Block 1 188,370.00 150,696.00 150,696.00 42,120.00 702.00

10Water Maintance office Block 1 0.00 0.00 0.00 0.00 0.00

1112

2,663,149.30 2,130,519.44 6,146,284.48 595,486.80 9,924.78Total Rainwater Collection

Potential Of Rainwater CollectionSite : Minister quarter

Address: Harihar BhavanClient: Building Construction and Maintenance Division Office

Building : Minister Quarter Complex

The various components and the system design are done after the study of the feasibility of the collection of rainwater from the various buildings present in the complex. These are dealt as components in the following section.



3.3 RAINWATER HARVESTING SYSTEM DESIGN

Rainwater collected in catchment areas, i.e. roof or terraces, is transported through gutters and pipes to a storage tank. Gutters (channels installed around the edge of roofs) transport water to pipes leading to a storage tank.

For the first 10-15 minutes the water is collected in a flush tank/pipe in order to stop the pollutants from both catchments area and atmosphere from entering the storage tank. A flush tank/pipe is installed in such a way that the water reaches the storage tank only after the flush tank/ pipe is filled.

The excess water, after the storage tank is filled, is sent underground through either dug well, recharge well, pond or soak pits. This process is termed as “underground recharge”.

Water collected by such process is first filtered by bio-sand filtration method before using in the household. The bio-sand filter can be installed either before the storage tank or before the underground recharge.

3.4 COMPONENTS OF RAINWATER HARVESTING SYSTEM

The rainwater harvesting system comprises five basic components:

i. Catchment surface: the collection surface from which rainfall runs off The roof of a building or house is the obvious first choice for catchment. Water quality from different roof catchments is a function of the type of roof material, climatic conditions, and the surrounding environment.

The quantity of rainwater that can be collected from a roof is in part a functionof the roof texture: the smoother the better.

ii. Gutters and downspouts: channel water from the roof to the tankGutters are installed to capture rainwater running off the eaves of a building.Some gutter installers can provide continuous or seamless gutters.

The most common materials for gutters and downspouts are half-round PVC, vinyl, pipe, seamless aluminum, and galvanized steel.

Seamless aluminum gutters are usually installed by professionals, and, therefore, are more expensive than other options.

Regardless of material, other necessary components in addition to the horizontal gutters are the drop outlet, which routes water from the gutters downward and at least two 45-degree elbows which allow the downspout pipe to snug to the side of the house. Additional components include the hardware, brackets, and straps to fasten the gutters and downspout to the fascia and the wall.



Typical Rain Water Harvesting Installation and Components

iii. Filtration Tank: After the gutter and downpour pipes the water comes to this part and is passed through various layers of gravel, coal, carbon etc to filter the rain water and to be collected to the storage tank. This influent is first passed through first flush and then only collected in this tank and through to the storage tanks.

iv. One or more storage tanks, also called cisternsThe storage tank is the most expensive component of the rainwater harvesting system.

The size of storage tank or cistern is dictated by several variables: the rainwater supply (local precipitation), the demand, the projected length of dry spells without rain, the catchment surface area, aesthetics, personal preference, and budget.

v. Delivery system: gravity-fed or pumped to the end useThe laws of physics and the topography of most homesteads usually demand a pump between water storage and treatment, and the house or end use.

vi. Treatment/purification: for potable systems, filters and other methods to make the water safe to reuse.



CHAPTER – IV: QUANTITY AND COST ESTIMATE

This chapter deals with the component wise cost of the project, basis of the cost estimate and project funding. It gives the details of the basic costs of the materials & labors, analysis of rates for different works, pay item cost, and engineers’ estimate. The detailed project cost estimate is presented in the report as a separate volume. The item wise summary of engineers estimate is presented below.

4.1 BASIC COST

The basic cost of the materials and labors are based on the Kathmandu district rates of the items approved by the DUDBC, Maintenance Division Office, Anamnagar, Factory rates with transportation and prevailing market rates.

Principally, the required materials have been divided into two categories. 1) Local materials and locally manufactured products, 2) Imported manufacture products.

The materials as Aggregates, Sand, Stone, Timber, Brick are considered to be local materials and locally manufactured products are considered as GI pipes and fittings, HDPE Pipes and fittings, Cement and Reinforcement bars.

4.2 RATE ANALYSIS

The unit rate analysis was based on the District rates of Kathmandu for the year 2066/067 were used in unit rate analysis wherever possible. For items where district rates are not available, the market rates were obtained from commercial establishments and civil contractors. Based on these rates, the rate for each construction item was developed. The analysis is based on the Norms of Rate Analysis of GON.

The analysis of rates is basically based on the norms for rate analysis for civil works of GON published by the Ministry of works and transport. These norms provide a guideline on the productivity and requirements of labor, materials and equipment for various construction works. However, for those activities where GON norms do not provide any guidelines on productivity and requirements, they have been derived from the manufacturer’s specifications and consultant’s experience.

4.3 OVERHEAD, PROFIT AND TAXES

An overhead and contractor’s profit of 15% is included in all unit rates except the pipe and other electromechanical works. 13% VAT has been included in the total project cost separately.

4.4 ABSTRACT OF COST

2.3.4 OPTION – 1: USING 25,000 LTR RCC/BRICK WATER TANK (RECOMMENDED OPTION)

After the detail cost estimate of the Rain Water Harvesting, the total abstract of the cost of the system is provided in the table below. This cost includes the separated cost of the



Gutter system works, Rain water pipes (for down pour and horizontals and also the pipes laid in trenches, Filtration tank, Reservoir tanks, Recharge pit and finally the installation of motor pumps for supply from the reservoir to the main supply tanks of the respective house. The total project cost has been calculated to be NRs 13, 516,124.42 excluding 13% VAT and NRs 15,273,220.6 Including 13% VAT.

Rain Water Harvesting at Ministerial Quarter, PulchowkBill of Quantity

Owner's Name : DUDBC, Maintenance Division, AnamnagarAbstract of Cost for Rain Water Harvesting System (By Items)

S. No. Description Amount Remarks1 Gutter Works 74,464.05 2 Rain Water Pipes 623,045.33 3 Filtration Tank 784,671.46 4 Reservoir (25,000 Ltr Capacity) 9,180,898.51 5 Recharge pit (2000 mm x 2000 mm x 2450mm depth) 2,606,935.70 6 Installation of Motor pumps 246,109.38

Sub Total 13,516,124.42 13% VAT 1,757,096.18

Grand Total 15,273,220.60


Owner's Name : DUDBC, Maintenance Division, AnamnagarAbstract of Cost for Rain Water Harvesting System (By Works)

S. No. Description Amount Remarks1 Civil Works 11,862,298.26 2 Sanitary and Plumbing (Rain Water) works 1,407,716.79 3 Electrical Works 246,109.38

Sub Total 13,516,124.42 13% VAT 1,757,096.18


2.3.5 OPTION – 2: USING 5,000 LTR PVC WATER TANK (For Comparison Purpose only)

After the detail cost estimate of the Rain Water Harvesting, the total abstract of the cost of the system (Option – 2) is provided in the table below. This cost includes the separated cost of the Gutter system works, Rain water pipes (for down pour and horizontals and also the pipes laid in trenches, Filtration tank, Reservoir tanks (5,000 Ltr PVC Tank) , Recharge pit and finally the installation of motor pumps for supply from the reservoir to the main supply tanks of the respective house. The total project cost has



been calculated to be NRs 6,370,096.74 excluding 13% VAT and NRs 7,198,209.32 Including 13% VAT.


Owner's Name : DUDBC, Maintenance Division, AnamnagarAbstract of Cost for Rain Water Harvesting System (Option 2)

S. No. Description Amount Remarks

1 Gutter Works 74,464.05 2 Rain Water Pipes 623,045.33 3 Filtration Tank 784,671.46 4 Reservoir (5,000 Ltr Capacity) 2,034,870.83 5 Rechargepit (2000 mm x 2000 mm x 2450mm depth) 2,606,935.70 6 Installation of Motor pumps 246,109.38

Sub Total 6,370,096.74 13% VAT 828,112.58



Owner's Name : DUDBC, Maintenance Division, AnamnagarAbstract of Cost for Rain Water Harvesting System (Option 2)

S. No. Description Amount Remarks1 Civil Works 4,716,270.58 2 Sanitary and Plumbing (Rain Water) works 1,407,716.79 3 Electrical Works 246,109.38

Sub Total 6,370,096.74 13% VAT 828,112.58


This option has been provided for an alternate solution only in case of low budget available for the client. No detail Drawings have been provided for this Option. This is mainly useful for comparing of cost and choosing the stages of implementation in future. This option can be applied in case of low budget only, but this option also needs to be looked to add more reservoirs in future as well so as to tap the potentially available rain water in the complex.



CHAPTER – V: FUTURE ACTION PLAN

5.1 LIMITATION OF THE STUDY

The major limitation of this study has been the available time for study and designing of the system. Had there been more time the study would be more comprehensive and would be in a detailed manner and Data available from the client was not updated. These limitations could be eliminated with more appropriate and timely actions taken by the concern agencies and clients.

5.2 RECOMMENDATION AND CONCLUSIONS

The various components of the system have been designed so as to build the system stage wise. The various components for different buildings can be constructed at different stages as per requirements of individual houses also, so as to meet the necessary budget available for the implementing agency.

The various components have been designed individually for future implementation and can be divided stage wise.



ANNEX


rain water harvesting in ministers quarter complex

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