Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 550447
Title Assessing the impact of climate change on rainwater harvesting in the Oum Zessar watershed in Southeastern Tunisia
Author(s) Adham, Ammar; Wesseling, Jan G.; Abed, Rasha; Riksen, Michel; Ouessar, Mohamed; Ritsema, Coen J.
Source Agricultural Water Management 221 (2019). - ISSN 0378-3774 - p. 131 - 140.
DOI https://doi.org/10.1016/j.agwat.2019.05.006
Department(s) Soil, Water and Land Use
Soil Physics and Land Management
PE&RC
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Climate change - GCMs - SDSM - Tunisia - Water harvesting model
Abstract

Climate change is believed to have a large impact on water resources system both globally and regionally. It has become a major global issue, especially in developing countries because these are most affected by its impacts. Rainwater harvesting techniques offer an alternative source of water and represent specific adaptive strategies to cope with water scarcity within future climate change. Studying the impact of climate change on rainwater harvesting techniques, however, is difficult, because the general circulation models (GCMs) which are widely used to simulate scenarios of future climate change operate on a coarse scale. We estimated the impact of climate change on water availability at the watershed level by downscaling precipitation and temperature from the GCMs using a statistical downscaling model. A water harvesting model then assessed the performance of the rainwater harvesting techniques for the Oum Zessar watershed in southeastern Tunisia under current climatic conditions and scenarios of future climate change. Annual temperature tended to increase and precipitation tended to decrease. These changes of climatic variables were used in the water harvesting model to simulate future water availability. Changing the directions of water flow between sub-catchments in combination with changing the spillway heights strongly affected the performance of rainwater harvesting under the scenarios of future climate, resulting in a sufficient water supply for 92% of all sub-catchments, compared to 72% without these changes.

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