Hydrological Drought
Assessment: The Use of the ARRF Model for Monthly Streamflow Generation on
Intermittent Rivers of the Northeast Brazil
Marcos Airton de Sousa Freitas1,
Gabriel Belmino Freitas2
1(Senior Water Resources
Specialist with National Water Agency)
2(Department of Economy, University
of Brasília - UnB)
Corresponding Author: National Water
Agency – Adress code: 70.610-200; masfreitas@ana.gov.br
ABSTRACT:
This
paper presents the ARR model (Alternating Renewal Reward) for generating annual
streamflow, coupled with the Fragment model to disaggregate the annual
streamflow to monthly ones. This new coupled model, namely ARRF model, has been
applied to three typical intermittent basins in the State of Ceará - Brazil. In
order to better understand the phenomenology of the processes involved in modeling,
several statistical tests were applied to flood and drought events of the
typical hydrological streamflow series of this region. The ARRF model was able
to preserve the analyzed statistical parameters of the historical streamflow
series, as well as to reproduce the persistence (long periods of low and high
flow, i.e. drought and flood periods) encountered in the historical flow
series, which are fundamental for hydrological drought assessment and for the design
and operation optimization of multi-purpose reservoirs system.
KEYWORDS: Streamflow
Generation and Simulation, Semiarid Regions, Reservoir Operation Optimization
Artigo completo:
Received 10 Dec2019;
Accepted21 Dec.,
2019© The author(s) 2019.
Published with open access at www.questjournals.org
Quest JournalsJournal
of Research in Environmental and Earth SciencesVolume 5~
Issue 2(2019)
pp: 29-37ISSN(Online): 2348-2532
