E3S Web Conf.
Volume 183, 2020International Conference on Climate Nexus Perspectives: Water, Food and Biodiversity (I2CNP 2020)
|Number of page(s)||15|
|Section||Water Food Energy Nexus/Climate Change and Sustainable Water Management|
|Published online||03 August 2020|
Spatial and temporal rainfall variability and erosivity: Case of the Issen watershed, SW-Morocco
Geosciences and Environment Team (EGE), Department of Geology, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
* Corresponding author: email@example.com
The Issen basin is a dry area affected by climate variability and desertification. It is located in high spot of Moroccan flora biodiversity that includes argan tree ecosystem as a part of the Western High Atlas (WHA). The objective of this work is to assess rainfall variability and erosivity as determining factors of soil erosion and vegetation cover degradation. The results reveal an arid to superior semi-arid climate where annual rainfall range from 200 mm in the centre of the Argana corridor, to 500 mm in the snow-covered northern foothills. The analysis of the 37 years of rainfall data indicate a coefficient of variation Cvis about67%. The erosivity index presents a high variability range from 34 to more than 81 MJ.mm/ha.h.yr in the wettest areas, indicating considerable soil erosion. In addition, the basin suffering from severe periods of drought due to the occurrence of the continuous decrease of the accumulated precipitation. Eventually, the rainfall variability and erosivity can affect ecosystem function and services (ecosystem degradation, water availability, etc).
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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