Subdrainage Zone No. 1167 Watershed Condition Assessment: John Muir National Historic Site, Martinez, California

The purpose of this watershed condition assessment is to guide John Muir National Historic Site (JOMU) in choosing the best combination of land management practices in order to improve watershed conditions and reduce flooding downstream. The assessment is intended to document the effects of land uses on watershed runoff and to suggest opportunities for reducing flooding by improving watershed conditions. Variables of greatest concern at JOMU include vegetation and channel conditions and the presence/absence of stock water detention ponds. The report is structured to present an overview of the study watershed, a description of the runoff model, a brief explanation of the methods and alternative scenarios, and a discussion of the results and the conclusions. The report will describe how watershed processes at JOMU affect the relationship between rainfall and the potential for producing floods and model rainfall/runoff to examine several land management options.