SamSamWater Rainwater Harvesting ToolStep 4 of 4 (results)




Summary of results


The calculation could not be made. Either there is no rainfall data for this location, or the roof area or water demand is missing. Please go back to the previous steps and check your input, or start a new calculation.

Data source


The rainfall data used for this calculation is based on the CRU CL 2.0 dataset which is described in New, M., Lister, D., Hulme, M. and Makin, I., 2002: A high-resolution data set of surface climate over global land areas. Climate Research 21:1-25.

More information


Show information on the construction and maintenance of rainwater harvesting systems.

Literature on rainwater harvesting systems



Water from roofs

Water from roofs


Erik Nissen-Petersen, DANIDA (2006)

A handbook for technicians and builders on survey, design, construction and maintenance of roof catchments (source)
Roofwater Harvesting; A Handbook for Practitioners

Roofwater Harvesting; A Handbook for Practitioners


T.H. Thomas, D.B. Martinson, IRC (2007)

A handbook with guidelines for implementing (low cost) domestic roofwater harvesting systems or programmes. (source)
Construction of wire-reinforced cement mortar tanks

Construction of wire-reinforced cement mortar tanks


Neil Herath, Comminity Water Supply & Sanitation Project (CWSSP), Ministry of Housing, Construction & Public Utilities, Sri Lanka (1995)

this document has been scanned from earlier manuals and standardizations prepared by Neil Herath for CWSSP – Sri Lanka ( April 1995), and as Manual 3 of the Technical Manual Series on Rural Water Supply and Sanitation, Gravity Water Supply Systems: design and construction (January 2005). It is redesigned to look like the 2005 CWSSP manual guiding field work on wirereinforced cement mortar tanks, commonly known as ferrocement tanks (Han Heijnen, October 2010) (source)
RAIN Water Quality Guidelines; Guidelines and practical tools on rainwater quality

RAIN Water Quality Guidelines; Guidelines and practical tools on rainwater quality


RAIN Foundation, RAIN Foundation (2008)

This document addresses RAINs guidelines towards water quality and gives criteria and practical guidelines to improve and maintain an acceptable water quality of harvested rainwater for drinking purpose. (source)
Rainwater harvesting for domestic use

Rainwater harvesting for domestic use


Janette Worm, Tim van Hattum, Agromisa (2006)

Book Agrodok 43: 'Rainwater harvesting for domestic use' with useful and practical applications of rainwater harvesting in developing countries. (source)

Organizations with experience in the construction of rainwater harvesting systems



SamSamWater Foundation


SamSamWater Foundation aims to increase the number of people in developing countries with sustainable and reliable access to water and sanitation.
'SamSam' means 'together'. We work together to reach our goal: safe and reliable water to all! We believe in practical solutions, realised in close collaboration with our partners and beneficiary communities.

RAIN Foundation


RAIN is an international network with the aim to increase access to water for vulnerable sections of society in developing countries - women and children in particular - by collecting and storing rainwater.
Started in December 2003, RAIN focuses on field implementation of small-scale rainwater harvesting projects, capacity building of local organisations and knowledge exchange on rainwater harvesting on a global scale.

Acacia Water


Acacia Water “for solutions in groundwater” was established in 2003 at the Vrije Universiteit Amsterdam (Faculty of Earth and Life Sciences). Acacia Water focuses on groundwater in relation to surface water, environment and infrastructure. This varies from implementation of field measurements and model calculations, to giving training and strategic advice. Acacia distinguishes itself by the cooperation with the University, as a result of which Acacia Water has access to the latest scientific developments in the field of hydrology and environment. We translate this knowledge to innovative and practical solutions.




Meters Feet


Litres Gallons