Open AccessHydrological and hydroclimatic regimes in the Ouergha watershed
Author(s) -
Karim Msatef,
Lahcen Benaabidate,
Aziz Bouignane
Publication year - 2018
Publication title -
e3s web of conferences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.203
H-Index - 22
eISSN - 2555-0403
pISSN - 2267-1242
DOI - 10.1051/e3sconf/20183704001
Subject(s) - gumbel distribution , watershed , flood myth , environmental science , hydrology (agriculture) , water balance , climatology , climate change , extreme value theory , geography , geology , mathematics , oceanography , statistics , archaeology , geotechnical engineering , machine learning , computer science
This work consists in studying the hydrological and hydroclimatic regime of the Ouergha watershed and frequency analysis of extreme flows and extreme rainfall for peak estimation and return periods, in order to prevention and forecasting against risks (flood...). Hydrological regime analysis showed a regime of the rain type, characterized by rainfed abundance with very high winter flows, so strong floods. The annual module and the different coefficients show hydroclimatic fluctuations in relation to a semihumid climate. The water balance has highlighted the importance of the volumes of water conveyed upstream than downstream, thus confirming the morphometric parameters of watershed and the lithological nature. Frequency study of flows and extreme rainfall showed that these flows governed by dissymmetrical laws based on methods Gumbel, GEV, Gamma and Log Pearson III.