Variations in sediment yield from an agricultural drainage basin in central Belgium

摘要: At the outlet of a 250 ha agricultural drainage basin in Belgian loess belt, discharge and suspended sediment samples were sampled to study variations yield. Sediment yield during observation period 14 months equalled 9.8 t -1 year . In winter concentrations are relatively high because absence significant vegetation cover on fiel s. summer, fields with produce runoff but very little sediment. Furthermore, these trap eroded further upslope, resulting lower for similar discharges However, early spring events contribute most total as they have discharges. Within clockwise hysteresis was observed. Grain-size distribution is discharge-dependent: up 0.25 m 3 s sediments enriched fine particles.