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Middle Trinity |
Topic |
Sediment: Upper Middle Trinity - Slide Volumes by Land Use 1944-2000 |
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Caption: This chart shows the percent of total sediment volume resulting from landslides in the Upper Middle Trinity River Planning Watershed. Landslides are categorized by land use associations that include categories of road, harvest, or forest. Road and harvest landslides are considered management related. Forest slides were identified in non-managed areas. Total Sediment production has increased in volume since the 1944 period. Road-related volumes declined from 37% in 1944, to 23% in 1979, but then increased to 27% in 2000. Harvest-related landslide volumes increase from essentially 0% in 1944, to 23% in 1979, and remained at 21% in 2000. Forest slides declined from 63% in 1944, to 54% in 1979, to 52% in 2000. Data are from Graham Matthews and Associated Trinity River Sediment Source Analysis (2001). See Info Links for more information.
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sed_slides_type_pw_trinity_gma_1944_2000.dbf (size 1,385 bytes)