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Title: Distribuição espacial da pressão na lateral de um pivô central com base em um modelo digital de elevação (MDE)
Other Titles: Pressure head spatial distribution center pivot lateral line based digital elevation model
Keywords: Engenharia de irrigação
Irrigação de precisão
Irrigation engineering
Precision irrigation
Issue Date: Aug-2017
Publisher: Universidade Federal do Recôncavo da Bahia
Citation: BARBOSA, B. D. S. et al. Distribuição espacial da pressão na lateral de um pivô central com base em um modelo digital de elevação (MDE). Water Resources and Irrigation Management, Cruz das Almas, v. 6, n. 2, p. 131-139, maio/ago. 2017.
Abstract: The spatial distribution of pressure head values along a 432,6m long center pivot lateral line was determined using measured values, taken at the inlet and end sections of the lateral line, and combined with topographic elevation data from a SRTM (Shuttle Radar Topography Mission) image. Data furnished by SRTM describes topographic elevation values along the wheel tracks of each one of the eight towers used for the sustentation of the center pivot lateral line. For validation purposes of the process used for the determination of the pressure head distribution along the lateral line length, on 18 angular positions equally spaced along a complete turn of the lateral line, values of pressure head were also measured on 6 distinct points of the lateral line. Differences, on a 5% significance level for the student t means test, were observed when measured values were compared to pressure head values estimated based on SRTM's altitude data. After the creation of thematic maps, there was a coincidence in the positioning of the regions of occurrence of the highest of pressure head, also, the lower pressure head values. The study demonstrates that the use of elevation data from SRTM images is acceptable only for the elaboration of thematic maps destined to delimit within the irrigated area the occurrence of regions where different pressure head values prevailed
Appears in Collections:DEG - Artigos publicados em periódicos

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