Permeabilidade à água de solos utilizados no fundo de reservatórios na carcinicultura: um estudo de caso em Jaguaruana-CE

Abstract

Shrimp farming is a specific branch of aquaculture that has been expanding exponentially in recent years, especially in the Baixo Jaguaribe region in the state of Ceará, with emphasis on the municipality of Jaguaruana. Because it is an activity that demands a large amount of water for its operation, as it develops economically, stimulating the opening of new producing areas, the pressure on available water resources increases. Part of this demand is due, among other factors, to the need to cover losses due to soil infiltration. Thus, to ensure the sustainability of the sector regarding the rational use of water resources in order to contribute to the reduction of impacts related to infiltration, studies on soil permeability become imperative. In this regard, the objective of this work is to analyze the permeability of the soil used at the bottom of a reservoir in shrimp farming located in the interior of Jaguaruana - CE. For this, laboratory tests were carried out for geotechnical characterization and determination of the water permeability coefficient under variable load of three soil samples collected at different points on the bottom of a nursery that was in the initial construction phase. Based on the obtained results, it was verified that all collected points presented permeability coefficients in the order of 10 cm/s. Considering the values established by FAO (2006), it is concluded that the soil −7 of the place under study proved to be suitable for use in the construction of nurseries.