Techniques for monthly rainfall regionalization in southwestern Colombia
| Autor: | TERESITA CANCHALA, CAMILO OCAMPO-MARULANDA, WILFREDO ALFONSO-MORALES, YESID CARVAJAL-ESCOBAR, WILMAR L. CERÓN, EDUARDO CAICEDO-BRAVO |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Anais da Academia Brasileira de Ciências, Vol 94, Iss 4 (2022) |
| Druh dokumentu: | article |
| ISSN: | 1678-2690 0001-3765 |
| DOI: | 10.1590/0001-3765202220201000 |
| Popis: | Abstract The knowledge of rainfall regimes is a relevant requirement for many activities such as water resources planning, risk management, agriculture activities management, and other hydrologic applications. The present study has consisted of validating four techniques (one linear, one non-linear, and two hybrids) that allow identifying homogenous regions. We take the monthly rainfall in the Southwestern Colombia (Nariño), an area of 33,268 km2 characterized by complex topography and local factors that can influence the rainfall behavior, to test all techniques. The results showed overall the best performance for the approach related to non-linear principal component analysis and self-organizing map. However, in all mainly prevail two regions: the Andean Region and Pacific Region with a bimodal and unimodal regime, respectively. The bimodal one dominates over the Andes mountains range and the unimodal one the coastal zone. The application of non-linear approaches provided a better understanding of the seasonality of rainfall, and the results may be useful for water resource management. |
| Databáze: | Directory of Open Access Journals |
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