文章基本信息

标题：Sub-daily hydrological-hydrodynamic simulation in flash flood basins: Una river (Pernambuco/Brazil)
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作者：Otacílio Correia Lima Neto ; Alfredo Ribeiro Neto ; Fellipe Henrique Borba Alves 等
期刊名称：Revista Ambiente & Água
印刷版ISSN：1980-993X
出版年度：2020
卷号：15
期号：5
页码：1-13
DOI：10.4136/ambi-agua.2556
出版社：Instituto de Pesquisas Ambientais em Bacias Hidrográficas
摘要：Flash floods are observed in the Una River Basin, Pernambuco/Brazil.This particular type of flood is a short-duration hydrological event with occurrence of the peak flow within minutes to few hours after the onset of the rainfall, taking place typically in mountainous regions.The objective of the paper was to assess the sub-daily hydrological and hydrodynamic modeling of flood events in 2011 and 2017.Sub-daily precipitation and streamflow were applied to the models Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) and River Analysis System (HEC-RAS).Model evaluation methods such as Nash-Sutcliffe efficiency (NSE), percent bias, and the ratio of the root mean squared error to the standard deviation of measured data (RSR) were used in the calibration process.The maximum infiltration rate and the Snyder peak coefficient estimation were the most sensitive parameters in the hydrological model.The calibration of the HEC-HMS showed good performances (Catende station NSE=0.78 and RSR=0.46; Palmares station NSE=0.68 and RSR=0.57).During HEC-RAS 1D flow simulations, steep regions in the Una River caused numerical instabilities.The 2D solution was needed to overcome this problem, allowing us to represent the water level in the city of Palmares satisfactorily.
关键词：hydrologic modeling system; natural disasters; river analysis system; 2D simulation.