'Slow-rate' land treatment of wastewater differs from 'rapid infiltration' in that:
Choose the correct answer
Slow-rate uses underground pipes; RI uses sprinklers
Slow-rate applies at agronomic (crop uptake) rates; RI uses high percolation rates to recharge groundwater
Slow-rate is faster than rapid infiltration
No difference — both are the same treatment
Correct Answer
B. Slow-rate applies at agronomic (crop uptake) rates; RI uses high percolation rates to recharge groundwater
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Slow-rate: wastewater applied at agronomic rates (crop uptake + ET ≈ 1.5–10 cm/week); crop uptake of nutrients; minimal percolation. Used for: agricultural irrigation with treated effluent. Rapid infiltration (RI): high-rate infiltration through permeable soil (30–120 cm/week); recharges groundwater; needs pervious soil. Overland flow: applied on grassed impermeable slopes, runoff collected.
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