Rainfall regionalization and variability of extreme precipitation using artificial neural networks: a case study from western central Morocco
| Autor: | Assma Bouiji, Mohamed El Mehdi Saidi, Mounia Benrhanem, Abdelhafid El Alaoui El Fels |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Atmospheric Science
Global and Planetary Change precipitation extremes rainfall variability 010504 meteorology & atmospheric sciences Artificial neural network 0208 environmental biotechnology 02 engineering and technology Management Monitoring Policy and Law 01 natural sciences Environmental technology. Sanitary engineering 020801 environmental engineering Environmental sciences Geography rainfall regionalization Climatology principal components analysis GE1-350 Precipitation morocco artificial neural networks TD1-1066 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal of Water and Climate Change, Vol 12, Iss 4, Pp 1107-1122 (2021) |
| ISSN: | 2408-9354 2040-2244 |
| Popis: | Here, we investigate the precipitation regionalization and the spatial variability of rainfall extremes, using a 47-year long station-based dataset from western central Morocco, a region with marked topographic and climatic variations. The principal component analysis revealed three homogeneous rainfall regimes, consistent with topographic features: the coastal area receives heavy rainfall during autumns and winters, whereas the inner lowlands, in the middle of the study area, are characterized by an overall rainfall deficit regardless of their high water demand for irrigation, and the highest rainfall amounts take place in the mid-mountain area, including the summer seasons. Furthermore, the frequency analysis of daily rainfall extremes revealed high ten-year precipitation amounts in the coastal region (about 88 mm) and exceptional daily precipitation for longer return periods (182 mm for a 100-year period). Using artificial neural networks, the spatialization of these extreme precipitation events shows that they increase from the plain to the Atlas mountains and especially from the plain to the Atlantic Ocean. The spatial distribution of extreme precipitation highlights the areas where stormwater management needs to be improved, such as efficient stormwater drainage, and where floods are more likely to take place in the future. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|