There are a host of resources available on the web. Below are some links to get you started:
Creeks and Watershed Information
Oakland Museum of California
The Oakland Museum of California has various documents, geographic information systems and google earth versions of maps available for the San Francisco Bay Area Creeks.
Jef Poskanzer - Berkeley Creeks
A geographic and photographic database of the current and former creeks in the Berkeley area.
California Oak Mortality Task Force
A non-profit working group which coordinates research, management, monitoring, education, and public efforts to manage Sudden Oak Death in California.
The Weed Workers Handbook
Published by the Watershed Project and the California Invasive Plant Council, the Weed Workers' Handbook explains how to remove more than 35 of the San Francisco Bay Area's most invasive plants.
The Ecology Center provides sustainability resources for the public. ReScape California, also known as the Bay-Friendly Landscaping & Gardening Coalition, is an advocate and expert in the creation of sustainable landscapes.
The Ecology Center is a Berkeley-based non profit that provides sustainability resources for the public.
The Water Institute
The Water Institute develops innovative science-based solutions for communities and the environment to address the legacy of hydrologically destructive land-use practices and policies on California’s watersheds.