Technical Performance Evaluation of Domestic Roof Water Harvesting Schemes (The Case of Minjar and Shenkora Woreda Schemes)
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Date
2008-07
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Addis Ababa University
Abstract
The objective of the study is to diagnoses the technical performance of DRWH
schemes implemented by Water Action (an indigenous NGO) in Minjar and
Shenkora Woreda, Amhara Regional State. The key selected technical
performance evaluation indicators are reservoir capacity, capacity of gutter and
down pipes and water quality.
The study is conducted on all of the DRWH schemes implemented by water
Action in the woreda. The study methodologies employed are literature review,
semi-structured interviews, questionnaires, PRA and RRA has been employed to
probe more information on the grass root level. The mass curve technique and
the SIMTANKA software are also used to establish optimal tank/reservoir/ size.
Traditionally excavated pounds, River and deep wells are the major sources of
water supply for human being and livestock watering in the woreda. As
compared to other water sources traditional excavated ponds are the most
reliable sources of water supply though exposed for various contaminants and
serves for a few months.
Rainwater harvesting is back after having been ignored for decades. For arid and
semi-arid regions, DRWH has proven track-record of providing safe water next
to the house. The increased interest has been facilitated by a number of external
factors among others includes the shift towards more community based
approaches, the decrease in the quality and quantity of ground and surface water,
the failure of many piped water supply system due to poor O & M, etc.
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The study reveals that, in general, lack of awareness, policy issues, poor system
operation or management; lack of regular monitoring and maintenances are
among the main technical performance problems on the promotion and
implementation of the technology.
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Keywords
Water supply system due, Traditionally excavated pounds