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State of Punjab - Section

Section 41 in Punjab Urban Planning and Development Building Rules, 2018

41. Rainwater harvesting.

- The harvesting of rainwater simply involves the collection of water from surfaces on which rain falls, and subsequently storing this water for use. The rainwater collected can be stored for direct use or can be recharged into the underground aquifers. In scientific terms, water harvesting (broadly) refers to collection and storage of rainwater from the rooftops. This also restricts evaporation and seepage into building foundations.A rainwater harvesting system consists of the following:-(a)Roof catchment;(b)Gutters;(c)Down pipes;(d)Rain water/ Storm water drains;(e)Filter Chamber;(f)Storage Tanks/ Pits/ Sumps; and(g)Ground Water recharge structures like pit, trench, tube well or combination of above structure.
(1)Rainwater harvesting techniques. - There are two main techniques of rain water harvestings, namely:-
(a)Storage of rainwater under surface; and
(b)Recharge to ground water.
(2)Harvesting provisions in various building categories. - The provision for rain water harvesting is as under:
Table 53Provisions for Rainwater harvesting by building types
Category/Use Area of Plot Provisions to be made Other conditions
Residential Plotted Houses
New Proposals Above 250 sq. mt. Construction of Rain Water Harvesting Structure. Shall have emphasis on both storage and reuse.
Group Housing    
New Proposals All plot sizes Construction of RainWater Harvesting Structure.Concrete paving to be avoided and permeablematerials are to be used for all open parking spaces. Should indicate the system of Strom WaterDrainage, Rain Water Harvesting Structure and Recharging Well
Govt. &Semi Govt. Public Buildings &Private Institutions
All Proposals Above 250 sq.mt. Shall have Rain Harvesting Structure and storageShall have Recharge pits Water Shall have emphasis on both storage andreuse.
Commercial / Mixed use Buildings
All Proposals Above 100 Sq.mt. Construction of RainWater Harvesting Structure.Soft landscape provisionand open spaces with Percolation pits.Common treatment plant to be made part of theintegrated development. funded by sale of commercial space. Should indicate the system of Stor WaterDrainage, Rain Water Harvesting Structure and Recharging Well.Shall have emphasis on both storage and reuse.
Industrial
All proposals Above 100Sq.mt. Construction of RainWater Harvesting Structure.Soft landscapeprovisions and open spaces with Percolation pits.Common treatment plant to be made part of theintegrated development funded by sale of commercial space. Should indicate thesystem of Strom Water Drainage, Rain Water Harvesting Structureand Recharging Well.Provision should be made not to injectcontaminated water into recharge structures in industrial areasand care to be taken to keep such structure away from sewerlines,septic tanks, soak pits, landfill and other sources ofcontamination.
Provided that design and structural specification of rain water harvesting system shall be prepared and certified by an Engineer dealing with civil work.