Data/hora: 19/05/2024 23:35:08

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 13/02/1996
Data da última atualização: | 11/11/2011
Autoria: | SOUZA, F. de.
Título: | Non linear hyorddynamic model of furrow irrigation.
Ano de publicação: | 1974
Fonte/Imprenta: | California: University of California, 1974.
Páginas: | 172p.
Idioma: | Inglês
Notas: | Tese Doutorado.
Conteúdo: | A mathematical model of the entire furrow-irrigation process has been developed. This model can be used to analyze and predict the performance of free-draining sloping furrow irrigation systems; capability for prediction of flow with cutback was also provided. The model is based on the solution of the complete continuity and momentum conservation equations, which govern the unsteady, gradually varied flow of water in open channels. Therefore, it is a  complete hydrodynamic model. In addition, it has been demonstrated that zero-inertia conditions can also be simulated by the present model. A fully implicit finite-difference scheme was used to find approximate solutions for the integrated form of the non-linear governing equations, which are simultaneously solved by the double-sweep technique. The input to the model consists of the inflow discharge, furrow slope, cutoff (application) time, length, roughness (the Manning n), soil-infiltration characteristics (k and a in the Kostiakov equation), and furrow shape (C and M in the top width equation, B = CyM, for a power-law cross section). Output information consists of advance and recession times, post-irrigation areal distribution of infiltrated water along the furrow, runoff volume, as well as water application and storage efficiencies. Dimensional analysis was applied to reduce the number of governing parameters in the equations.
Palavras-Chave: | Furrow; Mathematical model; Sulco.
Thesagro: | Irrigação; Modelo Matemático.
Thesaurus Nal: | irrigation.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (5033-1) - ADD - TS - PP - TS 007/1974 -  - TS007/1974 - DIS