Table 5. Results for selected metrics used to evaluate future impacts of each of the six watershed management strategies. Evaluation metrics are summarized over all reaches in the watershed for sediment, hydrology, and riparian metrics, and over reaches currently accessible to winter steelhead for habitat suitability, spawner capacity, and egg-to-fry survival. Newly accessible habitat is summarized for each species. The maximum potential column describes the difference between estimates for current and historical conditions, an estimate of the maximum improvement in habitat condition or biological response that could be expected with infinite resources. Habitat suitability improvements include increases in both quantity and quality of habitat. Barriers and Riparian management strategy (Bar./Rip.), mass wasting (MW), pool-forming conifers (PFC), large woody debris (LWD), 90% confidence interval (CI); change (∆), an increase in the value over current conditions (↑), a decrease in the value (↓). Fine sediment = 0.25 to 1.0 mm. 1Laterally derived sediment is sediment entering a reach from adjacent hillslopes.
2Locally derived sediment = sediment entering a reach from adjacent hillslopes and from upstream reaches.


Evaluation Metric Barriers Bar./Rip. EDT Federal Landscape Expert Max Potential
Sediment
km laterally derived1 surface sediment ↓ 0.0 4.7 27.7 0.0 11.6 11.5 5569
km locally derived2 surface sediment ↓ 0.0 14.6 58.2 0.0 56.1 56.7 5805
km laterally derived1 MW sediment ↓ 0.0 0.8 0.0 9.3 3.0 2.2 2261
km locally derived2 MW sediment ↓ 0.0 5.8 7.6 90.3 42.0 29.5 3412
km laterally derived1 road sediment ↓ 0.0 0.0 70.3 256.9 142.6 98.9 4247
km locally derived2 road sediment ↓ 0.0 0.0 105.9 716.7 457.8 239.5 5224
km % of fine sediment entering reach ↓ 0.0 7.0 108.0 710.5 442.9 229.6 4230
km % fine sediment deposited in reach ↓ 0.0 5.9 101.7 705.2 424.8 215.2 5065
km fines deposited is newly <10% 0.0 0.0 4.7 24.8 9.8 7.8 724
Hydrology
km hydrologic runoff entering reach ↓ 0.0 4.7 29.0 0.0 11.7 11.9 5596
km 2.33-yr flood discharge ↓ 0.0 5.0 6.2 352.2 199.1 105.2 5466
km the index of bed scour ↓ 0.0 8.6 97.4 750.5 470.2 231.3 5325
Riparian
km shade score has ↑ 0.0 0.0 19.3 0.0 7.3 8.5 1719
km PFC score has ↑ 0.0 0.0 5.5 0.0 8.3 5.4 818
km LWD score has ↑ 0.0 0.0 27.2 0.0 9.6 10.3 3819
km all 3 riparian scores ↑ 0.0 0.0 27.2 0.0 9.1 10.7 3953
Habitat suitability
km suitability ↑ for chum 10.7 5.2 17.3 0 2.4 3.7 247
kmsuitability ↑ for spring Chinook 38 22.3 12.5 0 5.6 3.9 1020
km suitability ↑ for fall Chinook 38 22.3 19.2 0 5.7 3.8 1000
km suitability ↑ for winter steelhead 38.5 22.8 12.5 0 5.7 3.9 1123
km suitability ↑ for summer steelhead 38.5 22.8 12.5 0 5.6 3.9 1090
Spawner Capacity (Chinook)
km capacity ↑ (due to ∆ in reach quality) 0.0 0.0 14.8 0.0 9.2 5.3 168
km capacity ↑ (above and ∆ in accessibility) 38.0 22.3 15.2 0.0 13.7 6.6 679
Egg-to-dry survival
km Chinook/steelhead survival ↑ 0.0 0.0 96.6 0.0 73.0 58.0 1015
km coho survival ↑ 0.0 0.0 96.5 0.0 70.6 56.1 1014
EDT outputs (current w/out harvest; fall Chinook)
Capacity 24370 24370 25102 24370 24402 24489 29897
Equilibrium abundance 22367 22367 23305 22367 22406 22523 28265
Productivity 26.89 26.89 30.83 26.89 26.99 27.62 40.02
Accessibility
km newly accessible to chum 10.7 5.2 0.4 0.0 1.2 1.0 66
km newly accessible to coho 38.0 22.3 0.4 0.0 4.5 1.3 514
km newly accessible to spring and fall Chinook 38.0 22.3 0.4 0.0 4.5 1.3 531
km newly accessible to winter and summer steelhead 38.5 22.8 0.4 0.0 5.0 1.3 588