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Southern Mattole |
Topic |
Timber Harvest: Percent Area Harvested, S. Mattole Subbasin 1983-2001 |
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Caption: The chart above shows the percent area of each Calwater Planning Watershed in the Southern Mattole Subbasin permitted for timber harvest between 1983 and 2001. Greater than 25% percent of the area of the Thompson Creek Calwater Planning Watershed was permitted for timber harvest. These data were compiled from records of Timber Harvest Plans (THPs) approved by the California Department of Forestry, but the plans were not necessarily implemented. Areas were summed without subtracting for overlapping THPs, and do not include harvest from plans approved in 1977-1982 yet delayed for up to five years. The reference value of 25% harvest is shown because Reeves et al. (1992) found that the diversity of salmonids in Oregon coastal streams diminished when basins were harvested above that level. Click on the Picture Tab to see THP and digital orthophoto quadrangle images.
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thp_mat_amount_south.dbf (size 4,228 bytes) .
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thp_mat_amount_source.dbf (size 23,862 bytes)