Salmon Habitat Potential

Intrinsic potential (IP) provides an estimate of relative habitat potential inferred from attributes of channel size (based on estimated mean annual flow), channel gradient, and the valley-width index (the ratio of channel to valley width) as inferred from a DEM. Using the CLAMS model (Burnett .), intrinsic potential IP is defined as

IP = (I _FLOW *I _GRADIENT *I _VWI ) ^1/3 . (1)

Here IFLOW , IGRADIENT , and IVWI are the rankings based on mean annual flow, channel gradient, and valley-width index, respectively. Each varies between zero and one as shown if Figure 1.

IFLOW	IGRADIENT	IVWI

Figure 1. Functional relationships used to define Intrinsic Potential (IP); IFLOW: f1, f2, f3, and f4 are user-specified values currently set to 0.01, 0.06, 21.24, and 76.45 m³/sec; IGRADIENT: Here g1 and g2 are user-specified values currently set to 0 and 0.05, respectively; IVWI: VWI1 and VWI2 are user-specified values currently set to 3.31 and 7.4.