Presentation on theme: "Zone 4 Line A Preliminary Suspended Sediment Load Estimates HY08 Rand Eads RiverMetrics LLC 503-435-7516 Sources."— Presentation transcript:
Zone 4 Line A Preliminary Suspended Sediment Load Estimates HY08 Rand Eads RiverMetrics LLC www.rivermetrics.com firstname.lastname@example.org 503-435-7516 Sources Pathways and Loadings Workgroup December 8, 2008 Item # 2b
Zone 4 Line A HY07 11/10/06 – 4/30/07 Rainfall 10.38 in. 21 storms Max Q 308 cfs Total Q 33,400 cfs 84 SSC analyzed Max SSC 2,744 mg/L Max turbidity 1590 TU Est. load 139.6 MT HY08 1/31/08 – 6/11/08 Rainfall 2.11 in. 18 storms Max Q 241 cfs Total Q 22,900 cfs 66 SSC analyzed Max SSC 2,095 mg/L Max turbidity 892 TU Est. load 94.7MT Item # 2b
Changes in Data Collection Methods from HY07 to HY08 Bed-mounted boom provided complete data record for season Turbidity sensor and sampler intake at depth-proportional sampling position Improved debris shedding Possible increase in sand to fine ratio Item # 2b
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