|
|
|
|
|
| Juan,Wang; Pute,Wu; Xining,Zhao. |
| Soil infiltration is a key link of the natural water cycle process. Studies on soil permeability are conducive for water resources assessment and estimation, runoff regulation and management, soil erosion modeling, nonpoint and point source pollution of farmland, among other aspects. The unequal influence of rainfall duration, rainfall intensity, antecedent soil moisture, vegetation cover, vegetation type, and slope gradient on soil cumulative infiltration was studied under simulated rainfall and different underlying surfaces. We established a six factor-model of soil cumulative infiltration by the improved back propagation (BP)-based artificial neural network algorithm with a momentum term and self-adjusting learning rate. Compared to the multiple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rainfall intensity; Vegetation cover; Soil permeability; Sensitivity analysis. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100010 |
| |
|
|
| Lima,Cleene A. de; Palácio,Helba A. de Q.; Andrade,Eunice M. de; Santos,Julio C. N. dos; Brasil,Paulilo P.. |
| The characteristics of rainfall can provide important information for management and land use may also minimize the water erosion problems. This study was carried out to evaluate soil and water loss in erosion plots with different coverage, and the interference of natural rainfall characteristics on these processes. The experiment was carried out during the rainy season in the years of 2009 and 2010, on three erosion plots, each of 20 m², and under different land use conditions: native 'caatinga', thinned 'caatinga' and natural herbaceous cover. The rainfall was classified into three different rainfall patterns, characterized as early, intermediate and late. The predominant rainfall pattern for the two years under study was early rainfall with 47.6%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rainfall intensity; Erosivity; Water erosion. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013001100014 |
| |
|
|
| Almeida,Wilk S. de; Carvalho,Daniel F. de; Pereira,Fernandes A. C.; Rouws,Janaína R. C.. |
| ABSTRACT The study was carried out to evaluate sediment production, water infiltration and surface runoff in an Ultisol under simulated rainfalls with similar erosivity, but different combinations of intensity (Int) and duration (Dur). The rainfalls were applied after soil tillage in the period from August to September 2017, in Seropédica, RJ State, Brazil. Using a computer program, the treatments were defined from the erosivity calculated for a rainfall with intensity of 60 mm h-1 and duration of 60 min, resulting in the other combinations of Int and Dur: 44.5 mm h-1 and 106 min; 53.5 mm h-1 and 78 min; 66.9 mm h-1 and 48 min; and 76.5 mm h-1 and 38 min, in a completely randomized design with five repetitions. Sediment production varied from 2.17 to 6.11... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Erosivity; Rainfall intensity; Rainfall duration; Surface runoff. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800572 |
| |
|
|
| Pizarro,Roberto; Valdés,Rodrigo; García-Chevesich,Pablo; Vallejos,Carlos; Sangüesa,Claudia; Morales,Carolina; Balocchi,Francisco; Abarza,Alejandro; Fuentes,Roberto. |
| The study and analysis of precipitation has become a crucial tool in understanding the temporal and spatial behavior of water resources, in terms of availability and impact on extreme events. The objective of this study was to evaluate different rainfall parameters (intensities for 1-h duration D = 1 h and return periods of T = 5 and 100 yr, and mean annual precipitation) for different latitudinal and climatic zones in Chile. We analyzed the information recorded on thousands of pluvial bands and rain gauges for 49 stations; this because it is unclear how rainfall intensities change along the country (though total amounts do), in addition to a lack of literature focused on ranges and amounts on the behavior of rainfall variables. The Gumbel probability... |
| Tipo: Journal article |
Palavras-chave: Precipitation; Frequency-duration-intensity curves; IDF curves; Rainfall intensity. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000200014 |
| |
|
|
|
