scholarly journals Application of Markov chains to Standardized Precipitation Index (SPI) in São Francisco River Basin

2019 ◽  
Vol 14 (3) ◽  
pp. 1
Author(s):  
Esdras Adriano Barbosa dos Santos ◽  
Tatijana Stosic ◽  
Ikaro Daniel de Carvalho Barreto ◽  
Laélia Campos ◽  
Antonio Samuel Alves da Silva
Keyword(s):  
Markov Chains ◽  
River Basin ◽  
Arid Region ◽  
Standardized Precipitation Index ◽  
Precipitation Index ◽  
Severe Drought ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Semi Arid Region ◽  
Semi Arid

This work evaluated dry and rainy conditions in the subregions of the São Francisco River Basin (BHSF) using the Standardized Precipitation Index (SPI) and Markov chains. Each subregion of the BHSF has specific physical and climatic characteristics. The data was obtained from the National Water Agency (ANA), collected by four pluviometric stations (representative of each subregion), covering 46 years of data, from 1970 to 2015. The SPI was calculated for the time scales of six and twelve months and transition probabilities were obtained using the Markov chain. Transition matrices showed that, at both scales, if the climate conditions were severe drought or rainy, switching to another class would be unlikely in the short term.  Correlating this information with the probabilities of the stationary distribution, it was possible to find the regions that are most likely to be under rainy or dry weather in the future. The recurrence times calculated for the stations that belong to the semi-arid region were smaller when compared to the value of the return period of the representative station of Upper São Francisco that has higher levels of precipitation, confirming the predisposition of the semi-arid region to present greater chances of future periods of drought.

scholarly journals New record of Heraclides a. astyalus (Godart) (Lepidoptera: Papilioninae: Papilionini) on the northern São Francisco river, Brazil

Check List ◽  
2012 ◽  
Vol 8 (5) ◽  
pp. 927 ◽  
Author(s):  
Carlos Eduardo Beserra Nobre ◽  
Clemens Schlindwein
Keyword(s):  
Arid Region ◽  
New Record ◽  
National Park ◽  
First Record ◽  
Northeastern Brazil ◽  
Single Male ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Semi Arid Region ◽  
Semi Arid

A single male of Heraclides a. astyalus was collected in the Catimbau National Park, Buíque, Pernambuco, located in the semi-arid region of northeastern Brazil. It is the first record for the species in the Caatinga domain and the first record for the subspecies in latitudes above the São Francisco river.

Drought assessment using a TRMM-derived standardized precipitation index for the upper São Francisco River basin, Brazil

2017 ◽  
Vol 189 (6) ◽  
Author(s):  
Celso Augusto Guimarães Santos ◽  
Reginaldo Moura Brasil Neto ◽  
Jacqueline Sobral de Araújo Passos ◽  
Richarde Marques da Silva
Keyword(s):  
River Basin ◽  
Standardized Precipitation Index ◽  
Precipitation Index ◽  
Drought Assessment ◽  
Sao Francisco River ◽  
São Francisco River

1H NMR and LC-MS-based metabolomic approach for evaluation of the seasonality and viticultural practices in wines from São Francisco River Valley, a Brazilian semi-arid region

2019 ◽  
Vol 289 ◽  
pp. 558-567 ◽  
Author(s):  
Elenilson G. Alves Filho ◽  
Lorena Mara A. Silva ◽  
Paulo R.V. Ribeiro ◽  
Edy S. de Brito ◽  
Guilherme J. Zocolo ◽  
...  
Keyword(s):  
1H Nmr ◽  
Arid Region ◽  
River Valley ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Semi Arid Region ◽  
Metabolomic Approach ◽  
Semi Arid

scholarly journals Stable isotopic and geochemical characteristics of groundwater in Kherlen River basin, a semi-arid region in eastern Mongolia

2007 ◽  
Vol 333 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Maki Tsujimura ◽  
Yutaka Abe ◽  
Tadashi Tanaka ◽  
Jun Shimada ◽  
Satoru Higuchi ◽  
...  
Keyword(s):  
River Basin ◽  
Arid Region ◽  
Geochemical Characteristics ◽  
Stable Isotopic ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Eastern Mongolia

scholarly journals An environmental analysis of the acaraú river basin, Brazilian northeastern region

2020 ◽  
Vol 4 (3) ◽  
pp. 117-123
Author(s):  
Vanda Claudino-Sales
Keyword(s):  
Sustainable Development ◽  
Water Resources ◽  
River Basin ◽  
Environmental Degradation ◽  
Environmental Analysis ◽  
Arid Region ◽  
Hydrographic Basin ◽  
Semi Arid Region ◽  
Regional Authorities ◽  
Semi Arid

The rivers and their watersheds are fundamental elements of socioeconomic activities. In this article, we analyze the hydrographic basin of the Acaraú River, situated in the northeast of Brazil, from its geoenvironmental aspects, based on the perspective of the geosystem. In this perspective, a geoenvironmental picture of the hydrographic basin in question is presented, as well as the environmental problems that characterize it, postulating the need to carry out this type of survey to define the basin as a fundamental planning unit. The Acaraú River basin has particular characteristics, since it is located in a poor and extremely populous semi-arid region, which results in socio-environmental stress, whose main consequence is the environmental degradation of the fluvial course. The regional authorities need to be aware of the geoenvironmental elements raised in order to reverse this framework of socio-environmental degradation of water resources and to allow territorial growth based on sustainable development.

Sign in / Sign up

Export Citation Format

Share Document