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| Title | Chehalis River Basin, WRIAs 22 and 23, Fish Habitat Analysis Using the Instream Flow Incremental Methodology | |||
| Month-Year Published | April 2004 | |||
| Online Availability |
4074 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
See abstract below. (Also see abstract below) | |||
| Publication Number | 04-11-006 | |||
| Author(s) | Brad Caldwell and Jim Pacheco, WR and Hal Beecher, Terra Hegy and Robert Vadas, WDFW | |||
| Print Availability |
Copies are available from the Water Resources Program
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| Number of pages | 103 | |||
| Keywords | fish, fish habitat, flow, habitat, hydrology, IFIM, instream flow, Methodology, model, river, stream, stream flows, study, technical | |||
| Subject Waterbodies |
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| Related Web Content | Instream Flows in Washington | |||
| Related Publications | Title | Relationship | ||
| Walla Walla River Fish Habitat Analysis Using the Instream Flow Incremental Methodology | similar topic | |||
| Entiat and Mad Rivers Fish Habitat Analysis Using the Instream Flow Incremental Methodology | similar topic | |||
| Tucannon River Fish Habitat Analysis Using the Instream Flow Incremental Methodology | similar topic | |||
| East Fork Lewis River Fish Habitat Analysis Using the Instream Flow Incremental Methodology and Toe-Width Method for WRIA 27 | similar topic | |||
| Kalama River Fish Habitat Analysis Using the Instream Flow Incremental Methodology | similar topic | |||
| Washougal River Fish Habitat Analysis Using the Instream Flow Incremental Methodology and the Toe-Width Method for WRIAs 25, 26, 28, and 29 | similar topic | |||
| Big Quilcene River Fish Habitat Analysis Using the Instream Flow Incremental Methodology | similar topic | |||
| Abstract | Long Description |
The Washington state departments of Ecology and Fish and Wildlife conducted an instream flow study in the Chehalis River Basin using the Instream Flow Incremental Methodology (IFIM). This study provides information about the relationship between streamflow and fish habitat, which can be used in developing instream flow requirements for fish. Four key variables of fish habitat were examined: depth, velocity, substrate, and cover The Chehalis River basin study included six rivers: the Humptulips, Satsop, Chehalis, West Fork Hoquiam, Black, and Skookumchuck Rivers. The six river sites were chosen to represent a specific reach of each river. Field data were collected and entered into the computer model to simulate the distribution of water depths and velocities with respect to bottom substrate and overhead cover under a variety of flows. The simulated habitat parameters were then used to generate the quantity of available habitat at each modeled flow; this index is referred to as "weighted usable area" (WUA). |
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This page last updated November 4, 2009
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