Rain water harvesting is mandatory for all buildings with ground coverage 80 sq.mt and above.
The system of storm water drainage and storage in reservoirs and recharge should conform to one of the following specifications:
A. For Buildings with ground coverage above 80 sq.mt and below 500 sq.mt:
Percolation Pit or Bore Recharge shall be provided in the marginal space around the building. Such pits shall be filled with small pebbles, brick jelly or river sand and covered with perforated concrete slabs
B. For Buildings with building‐unit area above 500sq.mt and up to 1500 sq.mt:
Percolating Well with Rain Water Harvesting System (up to ground first river):
C. For Buildings with building‐unit area above 1500 sq.mt and up to 4000 sq.mt:
Percolating Well with Rain Water Harvesting System shall be provided for every 4000sq.mt (up to ground second river).
D. For Buildings with building‐unit area above 4000 sq.mt:
One Percolating Well shall be provided as per Regulation 17.2.2(c) for every 4000 sq.mt land area. As an alternative to providing multiple percolating wells, a Water Retention Pond with minimum capacity of 300, 000 liters with a percolating well for every five percolating wells or part thereof shall be permitted as an alternative.
Rain Water Storage:
For all building‐units with area more than 1000 sq.mt, Rain water storage tank shall be mandatory with adequate storage capacity.
Keywords
pits
units
liters
recharge
buildings
unit area
land area
reservoirs
river sand
Regulation
brick jelly
alternative
small pebbles
marginal space
ground coverage
Percolation Pit
minimum capacity
Water Retention Pond
Rain water harvesting
Rain water storage tank
following specifications
perforated concrete slabs
adequate storage capacity
multiple percolating wells
system of storm water drainage
