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Reports

Cache Creek Watershed Weed Management Plan

Weed Management Plan

For years, invasive species have been recognized as a natural resource concern in the Cache Creek Watershed. Federal, state, and local governments, and local stakeholder entities have acknowledged that invasive plant species pose severe threats to wildlife habitat, increase property damage from flooding, deplete and degrade water quantity and quality, and lead to more erosion problems in an area already prone to flooding and erosion. With the Yolo County RCD taking the lead, the Cache Creek Watershed Forum proposes to develop a plan which provides a watershed-wide approach to assess, treat, and monitor priority non-native invasive plant species. Our intent is to provide an invasive species management plan that will support past and current management efforts and ensure that current and future resources available for the crucial work of invasive species management are most effectively utilized.

 

Watershed-Based Assessment of Hydrologic and Geomorphic Conditions in Cache Creek through Capay Valley

Cache_Creek

Above: Photo of a point bar surface showing the Cache Creek streambed composed primarily of gravel- and cobble sized sediments.

The Capay Valley segment of Cache Creek flows through a rural area in northwestern Yolo County that supports a productive agricultural community. Resource management issues affecting lands along the stream corridor include: streambank erosion, the spread of invasive, non-native plants, and elevated levels of mercury in the ecosystem. As part of the conservation planning effort to address these issues, the Yolo County Resource Conservation District retained Kamman Hydrology & Engineering, Inc. (KHE) to prepare this assessment of the hydrologic and geomorphic conditions of Cache Creek within Capay Valley. Work was funded through the CALFED Watershed Program, Department of Water Resources and the California Bay-Delta Authority. The assessment describes the physical processes that collectively shape the stream corridor and control channel changes over time. The objectives of the study are to:

  • Document the physical characteristics of the stream channel and surrounding watershed;
  • Identify the causes of streambank erosion affecting lands along the stream corridor; and
  • Evaluate whether the prevailing geomorphic processes and stream channel morphology are indicative of a stable channel.

The preceding is from the Executive Summary of the 107 page report, which you can download here.