Development of methodology for existing rainwater harvesting assessment in (semi-) arid regions

Ammar Adham, M.J.P.M. Riksen, Mohamed Ouessar, Rasha Abed, C.J. Ritsema

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Arid and semiarid regions face water scarcity and climatic uncertainty. Rainwater harvesting (RWH) has been used for generations to cope with these challenges. Numerous methods have been applied to select suitable sites for RWH. However limited attention has been given to evaluation of RWH structure performance. In this study, a comprehensive methodology to evaluate and optimize the performance of existing RWH techniques in (semi-)arid regions was developed and tested. Engineering, biophysical, and socioeconomic aspects were integrated by using analytical hierarchy process (AHP) supported by geographic information system (GIS). Sixteen RWH locations (subcatchments) in the Oum Zessar watershed in Tunisia were examined. Based on the criteria selected, some 88% of the sites scored between 2 and 3 (low to moderate) on a 1–5 suitability scale; 6% scored higher than 3, and 6% received suitability scores less than 2. Improving RWH design by raising spillway heights by 50% increased overall suitability, with 69% of the sites scoring between 3 and 4 after such optimization. Our highly flexible, widely applicable methodology proved effective, easy to use and low cost. Its further application is recommended to support designers and decision-makers in assessing and optimizing the performance of both existing and new RWH systems.
Original languageEnglish
Title of host publicationWater and Land Security in Drylands
Subtitle of host publicationResponse to Climate Change
EditorsMohamed Ouessar, Donald Gabriels, Atsushi Tsunekawa, Steven Evett
PublisherSpringer Publishers
Pages171-184
ISBN (Electronic)9783319540214
ISBN (Print)9783319540207
DOIs
Publication statusPublished - 2017

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    Adham, A., Riksen, M. J. P. M., Ouessar, M., Abed, R., & Ritsema, C. J. (2017). Development of methodology for existing rainwater harvesting assessment in (semi-) arid regions. In M. Ouessar, D. Gabriels, A. Tsunekawa, & S. Evett (Eds.), Water and Land Security in Drylands: Response to Climate Change (pp. 171-184). Springer Publishers. https://doi.org/10.1007/978-3-319-54021-4_16