@article{BarbosaAlmeidaRabeloCoelhoetal.2018,
  author    = {Barbosa, Luis Romero and Almeida, Cristiano das Neves and Rabelo Coelho, Victor Hugo and Freitas, Emerson da Silva and Galvao, Carlos de Oliveira and de Araujo, Jose Carlos},
  title     = {Sub-hourly rainfall patterns by hyetograph type under distinct climate conditions in Northeast of Brazil},
  series = {RBRH Revista Brasileira de Recursos H{\´i}dricos Brazilian Journal of Water Resources},
  volume    = {23},
  journal   = {RBRH Revista Brasileira de Recursos H{\´i}dricos Brazilian Journal of Water Resources},
  publisher = {Associa{\c{c}}{\~a}o Brasileira de Recursos H{\´i}dricos},
  address   = {Porto Alegre},
  issn      = {1414-381X},
  doi       = {10.1590/2318-0331.231820180076},
  pages     = {14},
  year      = {2018},
  abstract  = {The lack of process-based classification procedures may lead to unrealistic hyetograph design due to complex oscillation of rainfall depths when assimilated at high temporal resolutions. Four consecutive years of sub-hourly rainfall data were assimilated in three study areas (Guaraira, GEB, Sao Joao do Cariri, CEB, and Aiuaba, AEB) under distinct climates (very hot semi-arid and tropical wet). This study aimed to define rainfall events (for Minimum Inter-event Time, MIT, and Minimum Rainfall Depth, MRD, equal to 30 min and 1.016 mm, respectively), classify their hyetograph types (rectangular, R, unimodal with left-skewed, UL, right-skewed, UR, and centred peaks, UC, bimodal, B, and shapeless, SL), and compare their key rainfall properties (frequency, duration, depth, rate and peak). A rain pulse aggregation process allowed for reshaping SL-events for six different time spans varying from 2 to 30 min. The results revealed that the coastal area held predominantly R-events (64\% events and 49\% rainfall depth), in western semi-arid prevailed UL-events (57\% events and 63\% rainfall depth), whereas in eastern semi-arid mostly were R-events (61\% events and 30\% rainfall depth) similar to coastal area. It is concluded that each cloud formation type had important effects on hyetograph properties, differentiating them even within the same climate.},
  language  = {en}
}