Percolation Pit is also like Rainwater Harvesting System A percolation pit, in its most low-tech form, is a simple hole dug into the ground. It facilitates groundwater recharge through infiltration of surface runoff into the soil or rock. Differences to contour trenches: Better water storage capability due to greater depth. Percolation tank is an artificially created surface water body, submerging in its reservoir a highly permeable land so that surface runoff is made to percolate and recharge the ground water storage. The percolation tanks are mostly earthen dams with masonry structure only for spillway. Percolation tank is an artificially created surface water body, submerging in its reservoir a highly permeable land so that surface runoff is made to percolate and recharge the ground water storage. Percolation tank should be constructed preferable on second to third order streams, located on highly fractured and weathered rocks which have lateral continuity down stream. The recharged area down stream should have sufficient number of wells and cultivable land to benefit from the augmented ground water. The size of percolation tank should be governed by percolation capacity of strata in the tank bed. Normally percolation tanks are designed for storage capacity of 0.1 to 0.5 MCM. It is necessary to design the tank to provide a ponded water column generally between 3 & 4.5 m. The percolation tanks are mostly earthen dams with masonry structure only for spillway. The purpose of the percolation tank is to recharge the ground water storage and hence seepage below the seat of the bed is permissible. for dams upto 4.5 m. height, cut off trenches are not necessary and keying and benching between the dam seat and the natural ground is sufficient.

Digital water flow meter as per CGWA Compliance ELECTROMAGNETIC FLOW METER Digital Flow Meter With Telemetry As Per CGWA Guidelines Installation of Digital Water Flow Meter on Ground water abstraction structures Whereas the Central Government constituted the Central Ground Water Authority (hereinafter referred to as the Authority) vide notification Number S.O. 38(E), dated 14th January, 1997, followed by notification number S.O. 1124(E) dated 6th November, 2000 and S.O. 1121 (E) dated 13th May, 2010 of the Government of India in the Ministry of Environment & Forests, for the purposes of regulation and control of ground water development and management in the whole of India and to issue necessary regulatory directions. And whereas the Authority has issued ‘Guidelines to control and regulate ground water extraction in India’ vide notification number 3289(E) dated 24th September, 2020, wherein under Section 9 (i) “Installation of digital water flow meter (conforming to BIS/ IS standards) having telemetry system in the abstraction structure(s) shall be mandatory for all users seeking No Objection Certificate and intimation regarding their installation shall be communicated to the CGWA within 30 days of grant of No Objection Certificate through the web-portal.” THIS IS TO BRING TO THE NOTICE OF ALL GROUND WATER USERS THAT: All the project proponents/users drawing ground water and seeking/having NOC shall have to mandatorily install tamper-proof digital water flow meters with telemetry on all the ground water abstraction structures within their premises. All the Micro and Small Enterprises drawing less than 10 cum/day shall also be mandatorily required to install digital water flow meters on all the ground water abstraction structures within their premises. Such enterprises shall be subjected to randomised inspections. The afore-mentioned conditions need to be strictly followed by all the users and any ground water withdrawal without the installation of tamper-proof digital water flow meters and telemetry (wherever applicable) shall be construed as illegal. Non-compliance of these conditions shall invite a Penalty provision and/or Environmental Compensation against the proponent for illegal withdrawal of ground water as per the CGWA Guidelines and may result in cancellation/rejection of NOC and sealing of ground water abstraction structures.

Water Conservation, Ground Water Rejuvenation and Development via Rainwater Management and Harvesting Rainwater through Ponds and Borewell Recharging Structures to Support Increasing Demand of Water for Daily usage for Domestic, Industrial and Agricultural purposes. Water Conservation and Harvesting Structures in Naturally Water Scarce Regions creates Geo-Hydrological Opportunity and Economic Viability. Ponds recharging structure, farm pond, stop Dam, and small pond etc. It is seen that different Geographical Location and unique Geophysical and Hydrological Nature and every situation needs to be addressed, separately, the groundwater recharge capacity of the varies regions may vary depending upon area specific geophysical nature of earth strata. Recharge Wells provide an opportunity to extract sub-surface flow of the region without exploiting the Groundwater reserve.

Geophysical survey for Rainwater Harvesting, a number of years of experience and technical knowledge we are able to provide you the most suitable locations to drill a Borewell on your site. By using technically advanced equipment like Resistivity meters & Electromagnetic (EM) VLF instruments we provide high quality service with excellent execution. Before any Rainwater Harvesting System construction is done, we help you in identifying the nature of Soil Structure & what is the actual Depth to recharge Rainwater.

CGWA Clearance Central Ground Water Board (CGWB) . Statement indicating position of pending cases received for NOC for ground water withdrawal. Statement showing list of project proposals to whom NOC for ground water withdrawal has been issued. The annual replenishable ground water resources availability plays an important role in defining the guidelines. The latest assessment of the state wise ground water resources as on 31.03.2009 is available at the Central Ground Water Board . As per the ground water resource estimates of 2009, out of the 5842 assessment units (Blocks, Mandals, Talukas, districts), 802 over-exploited units, 169 critical units, 523 semi-critical units, 4277 safe units and 71 saline units have been identified across the country by Central Ground Water Board. The Annual replenishable ground water resources have been estimated as 431 Billion Cubic Meters (bcm). The Net Ground Water Availability is 396 bcm and the overall stage of ground water development of the country is 61%. Therefore, prior permission/NOC from CGWA has to be obtained before construction of any Groundwater abstraction structure viz. Tube wells, Bore wells, Dug wells etc. Allegiance can offers its client the following services: Examining the area of the groundwater against availability Water requirement Availability of aquifer A Shallow aquifer B Deeper aquifer Status of the groundwater development of the area Preparation of proposal for augmentation of groundwater abstraction Preparation and implementation of water conservation measures Facilitation for obtaining NOC from CGWA, New Delhi

Digital Water Level Recorder (DWLR) with Telemetry which can be used in piezometer wells for measurement of water level data. Devices in Water level measurement are the next-generation products in the water sector. Ideal solution for *Real-time measurement of fluctuations in water table *Central Ground Water Board(CGWB) NOC compliances *Determining efficiency of rain water harvesting systems *Planning crops and drought forecasting in agriculture Data communications GPRS/GSM Data visualization - Graphs & list view of data collected - Analytical tools for trend analysis - Location of wells on Google maps User configurable features - Roles and accessibility - Frequency setup* - Remote triggering* Data download options - CSV and xlsx format - Reports

Digital Water Level Recorder (DWLR) Non-Telemetry which can be used in piezometer wells for measurement of water level data. devices in Water level measurement are the next-generation products in the water sector. Ideal solution for *Real-time measurement of fluctuations in water table *Central Ground Water Board(CGWB) NOC compliances *Determining efficiency of rain water harvesting systems *Planning crops and drought forecasting in agriculture Data download options - CSV and xlsx format

‘V’ Wire Injection Well Technology to Recharge Groundwater Source: • The Rain Water is lead through water channel and first reaches the silt trap, which allows for silt to accumulate in the chamber. The overflow water is lead into the injection well, passing through multilayer’s of Filtration media placed at the top of the injection well. The water is accommodated in a specially designed storage well, which creates water column, injecting large quantities of water into the deeper layers of the semi impervious earth’s strata through the Non Clogging V-Wire screens attached to the specifically designed percolator pipe, placed to a depth of 30 meters below the ground. The water column and the dual V-Wire Screen allow for the water to reach the dry joints, cracks, aquifers and recharge the ground water source. • This technology does not employ moving parts; the assured life span of the material is a minimum of twenty years. The maintenance cost involves desalting of the silt trap and replacement of filtration media once in five years. • The technology was adaptable to harvest rain water, irrespective of the presence of any bore well in place and also irrespective of terrain. The technology gave maximum flexibility to be used either in low lying areas or in upland conditions. • All materials used in this Technology are eco-friendly and recyclable. • Technology works on the Gravitational Principal Geomorphic profiling through vertical electrical Sounding of the soil strata is done to ascertain enormous quantity of water, quickly penetrating the rainwater into groundwater source. • The Provisioning of silt Trap fitted with Horizontal V wire Screen Filter eliminated the need of periodic maintenance and also facilitating significant volumes of rainwater to get into the recharging well.

Rainwater Harvesting Filters. FL 100 (Rooftop Area upto 1200 Sq. Ft) The characteristic features of FL Series Dual Intensity RWH Filter is its capacity to take up the load up to 10 to 110 square meters of Roof area with variable intensity of rainfall of 5 to 75 mm/ hour with a discharge capacity of 10 to 105 Liters per minute. This filter can be conveniently used for Harvesting Rainwater for Individual households, Schools, and Smaller Roof area Buildings. • Item Code: FL-100 Suitable up to area: 110 SQMTRS Max: Intensity of Rainfall: 75 mm/hr Working Principle : Cohesive Force & Centrifugal force Operating Pressure: Less than 2 feet of head (0.060kg/cm2) Capacity: 105 LPM Filter Element: SS-304 Screen Mesh Size: 250 Microns Inlet: 90 MM Clean Water Outlet: 63 MM Drain Outlet: 90 MM Housing: High Density Polyethylene Efficiency of Filter: Above 90% Source of Power: Gravity

Rooftop Rainwater Harvesting Filters. for Industries Use FL 500 (Rooftop Area 5000 Sq.ft.) The characteristic features of FL Series Dual Intensity Rain Water Harvesting Filter is its capacity to take up the load up to 10 to 500 square meters of roof area with variable intensity of rainfall of 5 to 75 mm/hour with a discharge capacity of 10 to 480 liters per minute. This filter can be conveniently used for harvesting rainwater for apartments, institutions, hospitals, commercial buildings, industries, corporate houses of medium and large sizes. • Item Code: FL-500 Suitable up to area: 500 SQMTRS Max: Intensity of Rainfall: 75 mm/hr Working Principle : Cohesive Force & Centrifugal force Operating Pressure: Less than 2 feet of head (0.060kg/cm2) Capacity: 480 LPM Filter Element: SS-304 Screen Mesh Size: 250 Microns Inlet: 110 MM Clean Water Outlet: 90 MM Drain Outlet: 110 MM Housing: High Density Polyethylene Efficiency of Filter: Above 90% Source of Power: Gravity

Rainy Rainwater Harvesting Filter. FL 300 (Rooftop Area upto 3600 sq.ft) The characteristic features of FL Series Dual Intensity Rain Water Harvesting Filter is its capacity to take up the load up to 10 to 350 square meters of roof area with variable intensity of rainfall of 5 to 75 mm/hour with a discharge capacity of 10 to 340 liters per minute. This filter can be conveniently used for harvesting rainwater for individual households, schools, apartments, institutions, hospitals and commercial buildings of medium and small sizes. • Item Code: FL-300 Suitable up to area: 350 SQMTRS Max: Intensity of Rainfall: 75 mm/hr Working Principle : Cohesive Force & Centrifugal force Operating Pressure: Less than 2 feet of head (0.060kg/cm2) Capacity: 340 LPM Filter Element: SS-304 Screen Mesh Size: 250 Microns Inlet: 110 MM Clean Water Outlet: 90 MM Drain Outlet: 90 MM Housing: High Density Polyethylene Efficiency of Filter: Above 90% Source of Power: Gravity

Rooftop Harvesting Filters. FL 200/250 (Rooftop Area upto 2500 Sq.ft.) The characteristic features of FL Series Dual Intensity Rain Water Harvesting Filter is its capacity to take up the load up to 10 to 225 square meters of roof area with variable intensity of rainfall of 5 to 75 mm/hour with a discharge capacity of 10 to 225 liters per minute. This filter can be conveniently used for harvesting rainwater for individual households, schools, apartments, institutions, and commercial buildings of medium sizes. • Item Code: FL-200 Suitable up to area: 225 SQMTRS Max: Intensity of Rainfall: 75 mm/hr Working Principle : Cohesive Force & Centrifugal force Operating Pressure: Less than 2 feet of head (0.060kg/cm2) Capacity: 225 LPM Filter Element: SS-304 Screen Mesh Size: 250 Microns Inlet: 110 MM Clean Water Outlet: 75 MM Drain Outlet: 90 MM Housing: High Density Polyethylene Efficiency of Filter: Above 90% Source of Power: Gravity