Rooftop rainwater harvesting pdf

Rooftop rain water harvesting is the technique through which rain water is captured from the roof catchments and stored in reservoirs. Collection area, conveyance system, filtration treatment storage usage recharge the collection area in most cases is the roof of a house or a building. Methods of rainwater harvesting components, transport and. Technical details of rainwater harvesting 5 technical description a rooftop rainwater harvesting system consists the following elements. Rainwater harvesting rwh from rooftops may be one of the alternative water supply sources to supplement the potable water demand of addis. Rainwater harvesting seminar and ppt with pdf report. There is always some skepticism regarding roof top rainwater harvesting. Water pipes should be uv resistant isi hdpepvc pipes of required capacity. Rooftop rain water harvesting is a technique through which rain water is captured from roof catchments and stored in reservoirs 8, 10. Manual for rooftop rainwater harvesting systems metameta. Added to urbanization, scanty and erratic rainfall is often resulting in reduction in water levels indicating depletion in storage in the surface reservoirs.

Each drainpipe should have mesh filter at mouth and first flush device before connecting to storage tank. For developing a sustainable remedy policy, rooftop rainwater harvesting rrwh strategies were implemented into the water supply and. Pretank filtration after m ore than 20 years in the rainwater industry, rainwater managem ent solutions has identified the w isy 4step system as the ideal m ethod for rainwater harvesting. Rainwater from rooftop should be carried through down take water pipes or drains to storage harvesting system. Using rainwater, where appropriate, conserves potable. It is hoped that this will serve as a helpful guide to the field engineers. Pdf issues and challenges related to rooftop rainwater harvesting system have been discussed to highlight present knowledge. Rains are main source of water, and if rain water is harvested, the scarcity of water can be eliminated. First flush first flush is a device used to flush off the water received in first shower.

Our earth is covered with 75% of water and 25% of land but water scarcity is a global issue because the large extent of water is not used for the domestic purpose, irrigation purpose and one of the solutions for such problem is the rainwater harvesting in the areas of regular rainfall, the perfect alternative to overcome the water. Rainwater harvesting systems are simple which can be adopted by individuals 8. Readers are encouraged to consider the information, recommendations, and guidelines in relation to their specific requirements. In hilly terrains, rain water harvesting is preferred 10. Rooftop rainwater harvesting refers to the collection and storage of water from rooftops whereby the quality of harvested rainwater depend on the types of roof and the environmental conditions. The rain water harvesting is a simple and cost effective method of collecting or storing rain water by using scientific techniques. Rainwater harvesting is an excellent means of supplementing water for use on site if the process is permitted by state andor local laws. The rooftop rainwater harvesting manual and its companion volumes are designed to serve as general references and guides. At terraces, mouth of the each drain should have wire mesh to restrict floating. Pdf rooftop rainwater harvesting a case study iosr. The book on rain water harvesting is an attempt by iricen to propagate the concept of rain water harvesting which can be effectively implemented in our office and residential establishments. It includes the collecting, storing, and use of rainwater.

Water from sloping roofs could be caught through gutters and down take pipe. Roof top rain water harvesting central ground water. Assessing the potential for rooftop rainwater harvesting. The surface that receives rainfall directly is the catchment. The rooftop rain water harvesting is less expensive 7. Rooftop rain water harvesting systems are easy to construct, operate and maintain 9. In saline or coastal areas, rain water provides good quality water and. The potential area for rooftop rainwater harvesting adoption can be identified with the detail information of the rooftops and quality assessment in geospatial environment.