An excerpt from an oral presentation delivered at a civil and environmental engineering symposium states:
"Our multidisciplinary team completed a 24-month monitoring project evaluating ancestral recharge channels, known as acequias de careo, across the southern slopes of the Sierra Nevada in southeastern Spain. These medieval infiltration networks divert high-altitude spring snowmelt runoff into fractured bedrock fissures, utilizing the mountain aquifer as a natural subterranean reservoir. Our hydrologic sensors revealed that water diverted into the upper recharge zones during peak snowmelt in April required an average transit duration of 115 days to re-emerge at downslope agricultural springs in late summer. Crucially, isotopic tracer analysis confirmed that these traditional unlined channels increased late-season spring discharge by 38 percent compared to modern concrete conduits, which accelerate drainage rather than subsoil percolation. While contemporary regional planning frequently prioritizes pressurized drip grids, our empirical data confirm that regular communal desiltation of historic clay-and-stone trenches sustains this slow-recharge capacity with minimal expenditure."
Based on the oral presentation, which specific detail is supported regarding the operation of the ancestral infiltration channels?
- AThe primary goal of the two-year investigation was to mandate the complete elimination of pressurized drip irrigation across regional farms.
- Diverted snowmelt takes an average of 115 days to travel from the high-altitude infiltration zones to downslope agricultural springs.Cevap
- CThe medieval builders lined the channels with concrete to accelerate runoff velocity toward downhill communities.
- DThe speaker expressed skepticism regarding whether manual desiltation of traditional trenches provides any measurable filtration benefit.