What are the building codes about Rain Water Harvesting and Storm water discharge?
All homeowners need to obtain a permit before building their homes and the following is a summary of building codes concerning rainwater discharge from Nepal National Building Code NBC 208:2003 1. Rainwater falling on roofs, paved areas and other open areas must be collected and disposed of efficiently and quickly. Provision should be made for a separate and independent storm water disposal system leading to the public storm-water drain or natural watercourse for individual buildings. A collection tank can be built to “dispose” of the rainwater and/or a recharge pit (for groundwater recharging), qualifies as a natural watercourse. 2. For large and tall buildings free fall of rainwater from the roof is prohibited. It is necessary to catch the rainwater in roof gutters provided with down take pipes at suitable locations. Down take pipes are a component of a rainwater collection system. 3. A rain-water pipe shall not discharge into or connect with any soil pipe or its ventilating pipe or
