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Mik Lewicki San Francisco Estuary Institute SPLWG December 12, 2007 Watershed Specific Suspended Sediment Loads Modeling.

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Presentation on theme: "Mik Lewicki San Francisco Estuary Institute SPLWG December 12, 2007 Watershed Specific Suspended Sediment Loads Modeling."— Presentation transcript:

1 Mik Lewicki San Francisco Estuary Institute SPLWG December 12, 2007 Watershed Specific Suspended Sediment Loads Modeling

2 Introduction Suspended sediment loads are influenced by climate, geology and tectonics, soils, basin size and slope, land use and management.

3 Suspended Sediment Loads Vs. Discharge

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9 Alameda Ck. At Niles Arroyo De La Laguna Near Pleasanton Alamewda Ck. Below Welch Ck. Near Sunol Arroyo Valle Near Livermore Arroyo Valle Below Lang Canyon Near Livermore Cull Ck. Above Cull Ck. Reservoir Near Castro Valley Cull Ck. Below Cull Creek Dam Near Castro Valley San Lorenzo Ck. Above Don Castro Reservoir Near Castro Valley Water Year 1117900011177000111735751117650011176400111809601118096511180825 196014,674 19619 196236,784 1963163,405 52,293 19646,431 196599,569 15,592 19665,745 485 1967260,780 133,938 19688,344 1969146,757 197079,417 197124,999 19722,766 1973209,652 1974 8,037 1975 10,752 1976 6 1977 2 1978 65356? 1979 2,6418,475337 1980 43,038 1981 1,282 548 1982 93,217 66,828 1983 87,180 80,469 1984 19,508 10,714 1985 4,186 3,034 1986 48,908 47,243 1987 2,359 3,226 1988 98 1,040 1989 280 453 1990 1991 1992 1,328 4,852 1993 1994 589 1995 15,826 1996 12,560 1997 35,701 1998 45,291 151,514 1999 7,081 21,328 200035,41243,35513,887 8,116 27,032 20015,4627,145109 132 279 20028,09916,7641,441 1,496 3,738 2003394,341207,2958,230 10,216 79,756 200489,675 200541,933 2006150,401

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11 Results Information from these studies will be combined with information from other studies mainly through mass budgets to provide a more complete picture of temporal trends and spatial patterns in contaminant loads in the Bay We hope to learn where it might be the most appropriate to apply limited resources to achieve mass loading target, loads avoided target, or a sediment concentration target.


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