Rainwater Harvesting As Alternative Water Supply Source Case Study Of Siyadebirna Wayu Woreda

The main objective of this research is identifying rainwater harvesting as alternative waterrnsupply sources in Siyadebirna wayu woreda to solve shortage of water during critical dryrnseasons. The research is carried out based on case-study of Ejersa kubeti kebeles (Zinjerornwuha, Kubeti, Gotet dega and Kebet amba sub-kebeles), from November 2018 to May 2019.rnThe site has about 316 individual compounds which areas 1000mrn with an average roof area ofrn62mrn2rn2rn and 93.6% of the study area have suitable roof distribution for rainwater harvestingrnsystem.rn rnA descriptive quantitative study was carried out in order to achieve the objectives of the study.rnA daily rainfall data, catchment characteristics, roof material, family size, water consumptionrnand water demand data were collected from primary and secondary sources. The communityrnperspective and practice about rainwater harvesting was assessed. The collected data wasrnanalyzed using different tools including samsamwater RWH model, Google earth, GIS, MSrnExcel spread sheets. rnThe average annual rainfall of the study area is 961.12mm. The water consumption data of thernspecific sub-kebeles which included in the case study collected from the community throughrnquestionnaires and from local water committee. The average water consumption of the specificrnstudy area is 143 liter per compound per day. The results from minimum rainfall depth canrnfulfill the amount of additional water required for five months critical dry season of the studyrnarea (33mrn3 rn, 15,360m³ fromrnMicro/Macro). In addition to the rooftop rainwater harvesting the courtyard rainwaterrnharvesting can applicable as combined with roof. In other ways, the possibility large amount ofrnwater collection is high. The storage tank can be under ground and covered withrngeomembraine for protection of water loss through infiltration. The storage tank alsornconstructed with other materials depends on the community capacity. rnfrom rooftop, 63m³ from Courtyard with area 150mrn2rnThe amount of water collected from this system used as intermittent. RWH can be used tornbridge the dry period with the stored water when other sources are dry. Rainwater harvestingrnhas significant advantages for the study area including health, time saving, energy saving asrnwell as income generation.

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