International Journal of
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Research Article Volume 10 Issue 3
Probability of maximum flows in tropical watersheds: central pacific, Costa Rica
Marvin E Quesada
Received: March 05, 2026 | Published: June 15, 2026
Citation: Quesada ME. Probability of maximum flows in tropical watersheds: central pacific, Costa Rica. Int J Hydro. 2026;10(3):103-108. DOI: 10.15406/ijh.2026.10.00432
Abstract
The Parrita River basin that is located on the Pacific slope of Costa Rica, which has two defined climatic seasons: dry and rainy, is investigated. The method of the possibility of high flows occurring was applied, some methods address nonstationarity. Two frequency distributions were considered for the classical analysis as (a) the Generalized Extreme Value (GEV), (b) Gumbel to analyze the variation of the location, scale and shape parameters of the Gumbel and Pearson type 3 logarithmic distributions. Another way to estimate the occurrence of extreme flows is by frequency analysis. The probability of not exceeding a certain maximum flow value is considered. The research suggests that the Parrita River basin presents a rapid response to intense precipitation events, possibly associated with steep slopes, inadequate land use, limited surface storage capacity, and a dense hydrological drainage network. As a result of intense river channels. The increase in the frequency of extreme flow values, which would alter the connectivity processes between the main channel and the floodplains. The ENSO event has a direct influence on the flow levels of the Pirris, Candelaría y Parrita rivers. The Cold phase increases maximum flows due to a lot of rainfall and increases the risk of flooding.
Keywords: flow rate, gumbel, person, steep slopes, extreme flow, ENSO
©2026 Quesada. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.