Assessing the Performance of a Subsurface Water Retention System (SWRS) Prototype: First Evaluation of Work Productivity and Costs

Abstract

The potential to use Subsurface Water Retention Systems (SWRSs) to combat desertification and improve agriculture in arid and semiarid areas has already been investigated and proved promising. Nevertheless, a lack of specific machinery has prevented this technology from demonstrating its effectiveness on vast areas. In the present study, a specific prototype is presented along with the results obtained from a preliminary study conducted to assess effectiveness, performance and associated cost. During the test, the machinery permitted the construction of a SWRS 100 cm belowground using a 140 kW tractor. The effective field capacity (EFC) averaged at 0.19 ha h–1 whilst total cost was estimated to be as high as 4800.00 € ha–1. However, 93% of the cost was associated with the purchase cost of the removable impermeable film. A removal operation was also investigated using a 42 kw excavator for evaluating the EFC and cost which averaged at 0.2 ha h–1 and 655.79 € ha–1, respectively.