A comparative assessment of five precipitation products in the Saharan desert of Morocco: Sakia El Hamra basin case study-Reference-Cited by-同舟云学术

A comparative assessment of five precipitation products in the Saharan desert of Morocco: Sakia El Hamra basin case study

Published:2023-11-07 Issue: Volume: Page:
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Author:

El-Alaouy Nafia¹,GOUMI Said EL²,LAFTOUHI Nour-Eddine¹,Lahrouni Abderrahmane¹,Bouras El Houssaine³,Amazirh Abdelhakim⁴,Gouzrou Abdeljalil

Affiliation:

1. Cadi Ayyad University

2. Sultane Moulay Slimane University

3. Lund University

4. Université Mohammed VI Polytechnique

Abstract

Abstract The Sakia El Hamra basin, located in the Saharan region of southern Morocco, presents risks of sudden and devastating floods despite a generally arid climate. In this complex hydro-climatic context, the accurate estimation of rainfall is of paramount importance for the management of water resources and flood forecasting. However, the low density of rain gauges networks as well as the rugged topography of the Saharan Atlas, limit the knowledge of rainfall regimes. This study aims to evaluate the performance of five satellite precipitation products (GPM IMERG, TRMM 3B42, ERA5, PERSIANN and CHIRPS) compared to monthly observations from two weather stations (Laayoune and Essmara) over the period 2001–2017. The results reveal notable differences between the satellite products. On a monthly scale, the GPM IMERG product has the best overall accuracy with a mean square error (MSE) of 16.8 mm/month. However, TRMM 3B42 shows better temporal correlations with correlation coefficient (CC) of about 0.83. On an annual scale, TRMM 3B42 performed better than other products with the highest accuracy.

Publisher

Research Square Platform LLC

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