Gualala River Assessment Report

Title and Acknowledgements (390KB pdf) ...

Table of Contents (60KB pdf) ...

Executive Summary (821KB pdf) ...

Program Introduction and Overview (48KB pdf) ...

Assessment Strategy and General Methods (101KB pdf) ...

Basin Profile (1.6MB pdf) ...

Interdisciplinary Synthesis and Findings (1.5MB pdf) ...

Gualala River Estuary (0.5MB pdf) ...

North Fork Subbasin (4.9MB pdf) ...

Rockpile Subbasin (4.0MB pdf) ...

Buckeye Subbasin (4.6MB pdf) ...

Wheatfield Subbasin (6.1MB pdf) ...

Mainstem South Fork Subbasin (4.0MB pdf) ...

Limitations, References, Glossary, Abbreviations (100KB pdf) ...

Gualala River Assessment Products:

The products are intended to be useful to landowners, watershed groups, agencies, and others interested in restoration activities to guide habitat improvement, future land use, and management decisions, and direct further studies.

The compilation of existing data, collection of new data, and synthesis of those data provided the following products:

New California Geological Survey (CGS) maps of landslides, relative landslide potential, and instream sediment features at a 1:24,000 scale for the entire Gualala River Watershed. Mapping was conducted from 1984 and 1999/2000 aerial photo sets.

New California Department of Fish and Game (CDFG) habitat inventory surveys and observed juvenile salmonid presence data for large portions of the major tributaries in the watershed (101.1 miles).

New CDFG electrofishing presence status of coho salmon and steelhead trout.

Historical fisheries data for some areas in the Gualala River Watershed.

New CDFG table of Limiting Factors Affecting Salmonid Health and Production Based Upon Habitat Inventory Surveys Conducted in 1999 and 2001, and EMDS Stream Reach Scores in the Gualala River Watershed, California.

New CDFG table of Potential Salmonid Refugia Based Upon Habitat Inventory Surveys, EMDS Stream Reach, professional judgment, and local expertise in the Gualala River Watershed, California.

Map of Gualala Basin Stream Level Refugia Rating

New California Department of Forestry and Fire Protection (CDF) mapping of historical and current land use patterns across the Gualala River Watershed.

New CDF description of historical land use in the Gualala River Watershed.

Data excerpted from the North Coast Regional Water Quality Control Board (NCRWQCB) TMDL study and other water quality studies of the Gualala River.

Various data provided by cooperative landowners and the Gualala River Watershed Council in the Gualala River Watershed.

A hydrologic report for the Gualala River Watershed prepared by the Department of Water Resources.

New CGS, CDF, and CDFG map of Potential Restoration Sites and Habitat Limiting Factors for the Gualala River Watershed (Plate 3).

New CDFG table of Priorities for Restoration for the Gualala River tributaries.

Recommendations for management and restoration.

Recommendations for additional monitoring.