Influence of recession on the infiltration in open furrows on slopes, under constant flow

During surface irrigation, some phases related to its hydraulics are produced. The monitoring of these phases allows determining dvance and recession curves. The recession phase occurs after the application of water to furrows. Hydraulically, it is the most complex phase and therefore difficult to predict in mathematical treatments. To obtain the recession phase, it is necessary to determine the time at which water advances over the soil surface to specific points, called stations, over the area and then record the time at which it disappears. Observing the passage of the recessive front through the measuring stations along the furrows as a function of time defines the recession curve. Using field data obtained by Ramsey (1976) and by the Department of Agriculture and Chemical Engineering, University of Colorado (1980), in three different farms:  Horticulture, Stieben e Benson. This work aimed to study the effect of the recession time on the infiltrated profile in surface irrigation.

Influence of recession on the infiltration in open furrows on slopes, under constant flow

During surface irrigation, some phases related to its hydraulics are produced. The monitoring of these phases allows determining dvance and recession curves. The recession phase occurs after the application of water to furrows. Hydraulically, it is the most complex phase and therefore difficult to predict in mathematical treatments. To obtain the recession phase, it is necessary to determine the time at which water advances over the soil surface to specific points, called stations, over the area and then record the time at which it disappears. Observing the passage of the recessive front through the measuring stations along the furrows as a function of time defines the recession curve. Using field data obtained by Ramsey (1976) and by the Department of Agriculture and Chemical Engineering, University of Colorado (1980), in three different farms: Horticulture, Stieben e Benson. This work aimed to study the effect of the recession time on the infiltrated profile in surface irrigation.Durante a execução da irrigação por superfície se produz uma série de fases, de forma simultânea ou sucessiva, relacionadas com sua hidráulica. O acompanhamento das diversas fases da irrigação superficial permite a determinação das curvas de avanço e de recessão. A fase de recessão ocorre após o encerramento da aplicação de água aos sulcos. Hidraulicamente, é a fase mais complexa e, portanto, difícil de ser prevista nos tratamentos matemáticos. Para obtê-las é necessário ir ao campo e determinar o tempo em que a água avança sobre a superfície do solo até pontos específicos, chamados estações, ao longo da área e em seguida anotar o tempo em que a mesma desaparece. A observação da passagem da frente recessiva através das estações de medição ao longo dos sulcos e em função do tempo define a curva de recessão. Utilizando dados de campo obtidos por Ramsey (1976) e pelo Departamento de Agricultura e Engenharia Química da Universidade do Estado do Colorado (1980) em três diferentes localidades (HORTICULTURE, STIEBEN e BENSON) estudou-se, neste trabalho, o efeito do tempo de recessão sobre o perfil infiltrado na irrigação por sulco aberto em declive