IEP Seasonal Monitoring Report
Overview
Long-term ecological surveys have been a core function of the Interagency Ecological Program (IEP) since the program’s inception in the 1970s. The IEP Seasonal Monitoring Report presents the full time series for selected water quality, plankton, and fisheries surveys conducted by IEP in a single graphical report. The report is generated on a quarterly basis, with different set of ecosystem variables and surveys highlighted in each season. The report is developed by IEP scientists (including leads for monitoring surveys and the IEP Lead Scientist) and is reviewed by the IEP Science Management Team and Coordinators before online publication.
This report was last updated in April 2023, with available data through 2022.
Water Year Summary
Figure 1: mean is represented by a dotted red line
Figure 2: missing data are represented by tan triangles
Figure 3: Graph of water year type from 1966 to 2022. Values range from 3.1 to 15.3.
Table of Contents
Spring
- Delta Outflow
- Secchi Depth
- Water Temperature
- Chlorophyll
- Zooplankton
- Fish
- Recent Trends
Summer
- Delta Outflow
- Secchi Depth
- Water Temperature
- Chlorophyll
- Zooplankton
- Fish
- Recent Trends
Fall
- Delta Outflow
- Secchi Depth
- Water Temperature
- Chlorophyll
- Zooplankton
- Fish
- Recent Trends
Winter
- Delta Outflow
- Secchi Depth
- Water Temperature
- Chlorophyll
- Zooplankton
- Fish
- Recent Trends
Metadata
- Report Information
- Overview
- General Information
- Data Sets
Figure 4: IEP logo
Disclaimer: While substantial efforts are made to ensure the accuracy of these data, complete accuracy of data sets cannot be guaranteed. This report was developed by the IEP Synthesis Team. For questions, comments, or corrections, contact Rosemary Hartman – Rosemary.Hartman@water.ca.gov