IEP Technical Publications

IEP Technical Reports focus on scientific topics for resource managers, scientists and the public. An IEP Technical Report is an irregularly produced publication series that provides an avenue for reporting on larger, more complex studies or data collection effort. IEP Technical Reports are usually greater than 70 type written pages and do not undergo external peer review. Findings should be interpreted with caution.

Recent Technical Reports

Synthesis of data and studies related to the effect of climate change on the ecosystems and biota of the Upper San Francisco Estuary Year 2022
Climate Change MAST (Climate Change - Management, Analysis and Synthesis Team).  2022. Synthesis of data and studies related to the effect of climate change on the ecosystems and biota of the Upper San Francisco Estuary. IEP Technical Report 99.

  • An important climate change review has been published as an IEP Technical Report. This recent effort (PDF) effort by the Climate Change Management Analysis and Synthesis Team (MAST) represents critical analysis of issues important for continued management of water and aquatic habitats in the upper San Francisco Estuary and surrounding watersheds.

White papers providing a synthesis of knowledge relating to Delta Smelt biology in the San Francisco Estuary, emphasizing effects of flow
FLOAT-MAST (Flow Alteration - Management Analysis and Synthesis Team), 2022. White papers providing a synthesis of knowledge relating to Delta Smelt biology in the San Francisco Estuary, emphasizing effects of flow. Interagency Ecological Program, Sacramento, CA. IEP Technical Report #98. 191 pp.

  • Prepared by the Flow Alteration (FLOAT) Management Analysis and Synthesis Team (MAST), these white papers (PDF) are part of developing an annual summary and synthesis of factors affecting the Delta Smelt population. They provide the necessary background for understanding the annual summary and synthesis (in development) and will be useful to any one needing a basic background in Delta Smelt ecology.
  • These white papers are also are intended to be living documents updated at intervals to remain current with recent advances in understanding of the Delta Smelt population.

Synthesis of data and studies relating to Delta Smelt biology in the San Francisco Estuary, emphasizing water year 2017
FLOAT-MAST (Flow Alteration - Management, Analysist, and Synthesis Team). 2020. Synthesis of data and studies relating to Delta Smelt biology in the San Francisco Estuary, emphasizing water year 2017. IEP Technical Report 95. Interagency Ecological Program, Sacramento, CA

  • A two-page fact sheet (PDF) serves as a quick overview of findings. One bottom line from the report summary: High fall outflow may be important, but outflow alone is not sufficient to provide favorable conditions for Delta Smelt. High flows in 2017 resulted in many good habitat characteristics for Delta Smelt but smelt did not have the expected high survival or abundance. High temperatures in 2017 may have stopped Delta Smelt from thriving.
  • IEP Technical Report 95(PDF) and associated report appendices(PDF)

Interagency Ecological Program Long-term Monitoring Element Review: Pilot approach and methods development
IEP Long-term Survey Review Team. 2021. Interagency Ecological Program Long-term Monitoring Element Review: Pilot approach and methods development (2020). IEP Technical Report 96. 206 pp.

  • This study (PDF) evaluated the feasibility of reviewing and re-thinking IEP long-term compliance and monitoring surveys using a small subset of surveys and gears during the pilot review effort in 2020. The authors documented the insights gained into how to perform meaningful reviews and made explicit recommendations on proposed survey changes.

2017-2018 Delta Smelt Resiliency Strategy Action for Enhanced Control of Aquatic Weeds and Understanding Effects of Herbicide Treatment on Habitat
Rasmussen, N., L. Conrad, H. Green, S. Khanna, J. Caudill, P. Gilbert, P. Goertler, H. Wright, K. Hoffmann, S. Lesmeister, J. Jenkins, L. Takata, D. Bosworth, T. Flynn, E. Hard, T. Sommer. 2020. 2017-2018 Delta Smelt Resiliency Strategy Action for Enhanced Control of Aquatic Weeds and Understanding Effects of Herbicide Treatment on Habitat. Interagency Ecological Program Technical Report 94. 316 pp.

  • This study (PDF) examined ecological effects of submersed aquatic weeds in areas important for Delta Smelt and efficacy of fluridone for control of these weeds. Study elements discussed in this report span a broad range of topics including water quality monitoring, remote sensing, ecological community surveys, herbicide fate tracking, and toxicology experiments.

Zooplankton Integrated Dataset Metadata Report
Kayfetz, K., S. M. Bashevkin, M. Thomas, R. Hartman, C. E. Burdi, A. Hennessy, T. Tempel, and A. Barros. Zooplankton Integrated Dataset Metadata Report. IEP Technical Report 93. California Department of Water Resources, Sacramento, California.

  • The goal of this study (PDF) is to increase the usability and comparability of zooplankton data collected by IEP.

Framework for Aquatic Vegetation Monitoring in the Delta
Khanna, S., Conrad, L. Caudill, J., Christman, M. Darin, G. Ellis, D., Gilbert, P., Hartman, R., Kayfetz, K., Pratt, W., Tobias, V., & Wasserman, A. (2018). Framework for Aquatic Vegetation Monitoring in the Delta. Interagency Ecological Program Technical Reports, 1-54.

  • The goal of this study(PDF) is to describe potential frameworks for monitoring the aquatic vegetation community and distribution in the Delta and Suisun Marsh in a manner that informs resource management needs.

A History of the Operational and Structural Changes to the Tracy Fish Collection Facility
Morinaka, J. (2013). A History of the Operational and Structural Changes to the John E. Skinner Delta Fish Protective Facility from 1968 to 2010. Interagency Ecological Program Technical Reports, 1-33.

  • The purpose of this document (PDF) is to provide a background to the Tracy Fish Collection Facility and to describe the changes that have occurred, both operational and structural, at the facility throughout its existence.

Effects of Tidal Wetland Restoration on Fish
Sherman, S., Hartman, R., & Contreras, D. (2017). Effects of tidal Wetland Restoration on Fish: A Suite of Conceptual Models. Interagency Ecological Program Technical Reports, 1-358.

  • A suite of conceptual models (PDF) developed to articulate current understanding of the drivers and processes that govern how restoration will impact native fish species and their environment.

Technical Report Archive

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