| Area | Basinwide/General |
| Topic | Timber Harvest: Matthews By Large Basin (Area) 1933-1999 |
The map image above is from the KRIS Ten Mile Map project in ArcView and shows timber harvests from 1990 to 1999. The layer is derived from data provided by the California Department of Forestry. The legend at left shows timber harvest plans (THP) as they were approved by year (plans in 1990 = THP90). Calwater boundaries are shown for geographic reference.
The image above shows timber harvests of different historical periods as presented in Matthews and Associates (2000) as Figure 31. Analysis was done using aerial photos. The most recent timber harvest plan data (post-1988) comes from the California Department of Forestry.
The image above is of Figure 46 from Matthews and Associates (2000) and shows the amount of sediment in tons coming from timber harvest activities by period. Analysis was done using aerial photos. The most recent wave of logging did not trigger the extensive mass wasting of earlier logging periods, which is reflected in less sediment yield.
Figure 43 from Matthews and Associates (2000) shows the percentage of each Planning Watershed (large sub-basins) harvested by period. The data is derived from aerial photographs except for the most recent period when data relies on information provided by the California Department of Forestry.
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