Avaliação do desempenho de sistemas de drenagem subterrânea do perímetro irrigado de bebedouro - Petrolina-PE.

Abstract

The Bebedouro irrigation district subsurface drainage systems performance were evaluated, basing on the time of hydraulic head dropping. Among the five drainage systems evaluated, it was identified a area that does not need subsurface drainage, at the depths up to 2.0m. There is a area in which the drainage system is not being able to perform a satisfactory dropping in the water table, during a three days period, but in another one the system is draining over the project expectancy. The others systems exhibited a good performance, even satisfying the drainage system design requirements.