Technical Bid for Rain Water Harvesting.

Ref : ESHTL-011/2012                                                                      Dated : 10-11-2012

The President

Friends Colony, RWA

New Delhi

            Subject : Technical Bid for Rain Water Harvesting.

Dear Sir,

            Reference your call and discussion to give our technical bid of Rain Water Harvesting project at your colony we are submitting the same for your kind consideration.  The undersigned and Associate Director Rahul Sagar, entered into a comprehensive dialogue with your club committee executive members at your club coffee shop in your premises at 11:00 AM dated 29, October 2012.

            We are in line of integrated water supply and management of water from last 100 years.  The humble son of money lender Late Kishori Lal Sagar the first generation has the distinction of studying in 1899 at Roorkee Engineering College, worked for 33 yrs in irrigation department, the next generation, Late Om Parkash Sagar in getting patent of the water drilling rig registered in Calcutta 1948 in the name of Sagar Sons Ltd.  The Third Generation the undersigned entered into incorporating various Pvt. Ltd. companies for the main objects of water management and fiscal management and the last to follow is Enkay  Sagar Holdings Pvt. Ltd. in the year 1991.

            With an holistic experience of water management integrating from ground water to commission of total palatable water supply to our customers, their need for individuals, organizations, various industries and township, is our forte.

            In the preliminary discussion we initiated with your esteemed club members and we tried to gather the basic details of your colony which is spread our 50 acres of land with nearly 96 mansions and Centre Park which run across two latitudinal segments.  The discussion centered around for mansions and colony, which has proper storm water drains, the purpose of us is to construct catchment area as rain water harvesting to enhance the water table which is rapidly receding in the last  5 to 10 years in the friends  colony.  Your Resident Welfare Association has shown keen interest to install complete rain water harvesting adequate various nodal points.  Thus we shall be preparing a complete project with logistics and without logistics for your need and kind consideration, the former is a consultancy and the later is the execution of the project. Hence we are initially submitting this technical bid after which hearing from you, we can submit the financial bid for your approval and consideration.

Technical Bid

            In view of increasing demand of water for various purposes like horticulture, domestic, industries etc., a greater emphasis has to be laid for a planned and optimal utilization of water resources.  Due to uneven distribution of rainfall both in time and space, the surface water resources are unevenly distributed.  Also, increasing intensities of uses of irrigation, other domestic uses from surface water alone may result in alarming rate of water table creating acute problem. The continuous increased withdrawals from a ground water reservoir in excess of replensihable recharge may result in regular lowering of water table.  Thus a precarious problem is created resulting in drying of shallow wells and increase in pumping head for deeper wells and tube wells, which led to emphasis on planned and optimal development of water resources.

            Thus it is imperative to maintain the ground water reservoir in a state of dynamic equilibrium over a period of 5 to 10 years for the water level fluctuations to be put under severe monitoring, and to lay complete water harvesting bodies in the nodal points for absorbition of rain water.

Groundwater Quality

            Ground water quality is highly depended on the nature of the aquifers and on the ambient climatic conditions.  Pollutant inputs related to domestic wastes and industry have an impact on water quality throughout your colony and the discussion of pollution impact from organic compounds and pathogenic organisms is beyond the scope of our offer but inorganic constituents reports needs to be first taken from the available aquifer and the same has to be compare with the available plantation and trees in the colony.  Your colony lies in the best-yielding aquifer of northern Indian which is the Quaternary alluvial deposits of the Gangetic plain.  This constitutes a major source of water supply.  Good groundwater yields are also found in many of the tertiary sediments.  Groundwater storage in crystalline basement rocks is restricted to the fractures and groundwater yields are determined by fracture density.

Ground Water Harvesting

            The change in ground water storage is an indicator of the long term availabilities of ground water.  The change in ground water storage between the beginning and end of the non-monsoon season indicates the total quantity of water withdrawn from ground water storage, while the change between the beginning and end of monsoon season indicates the volume of water gone into the reservoir.  During the monsoon season, the recharge is more than the extraction and hence the ground water storage increase, which can be utilized in the subsequent non-monsoon season.

            To assess the change in ground water storage, the water levels are observed through a network of observation wells spread over the area.  The water levels are highest immediately after monsoon in the month of June or July.

The Rain water harvesting has broadly three concepts which are elaborated as under:-

Pit Method:

            Pit are excavated into permeable formations, which serve as ideal facilities for artificial recharge, abandoned gravel pits are most economical for this purpose.  This method has also very little application in Punjab and Haryana.

Induced Recharge:

            Induced recharge occurs where groundwater in pumped from a location near a surface water body so that lowering of ground water level induces water to enter the ground from the surface source.

            The method is effective in permeable formations, which hydraulically connected between the stream and the aquifer. (Shown in Fig. 1).  The amount of water depends on: pumping rate,

Fig.1 : Showing Flow Pattern with Pumping well

Permeability, type of well distance from stream and natural groundwater movement.  The stream velocity should be sufficient to prevent sediment deposition from sealing the streambed.

Injection methods:

            Such methods are of particular interest where over drafting occurs in confined aquifers and areas are located close to major canals.  As water is available during monsoons, injunction methods are suitable on account of clean water available close to sites (shown in fig. 2 ).  Such methods can be tried areas having confined aquifers and suffering from over drafting of groundwater.

Fig :2

            We hope that your RWA find our technical offer in the best of spirit and we look forward for your valued further order and are prepared to query if any in this regards. Please pay us a sum of Rupees Forty thousand only as our retainer fees for the technical concepts supply to you as your preliminary requirement for arranging from the government approval for the works requirement of drilling of five to six wells and same number of shallow wells for the same. Another Rs50,000/-for online information for the subject with progress details

We have worked for various Foreign missions and embassies in India and public sector undertaking, various industries the list is enclosed for your reference.  

Thanking you,

Yours Faithfully,

For ENKAY SAGAR HOLDINGS PVT. LTD.

Naresh Kumar Sagar

DIRECTOR

C.C. : - General Secretary (RWA Friends Colony)