Release Notes The following is a summary of the differences between the current release DSM2 FC.2023.01 and the previous release DSM2 v8.2.2: - Updated cross-sections and channel lengths using the DSM2 GIS Reference Project, which used 2018 bathmetry, and determined channel lengths using the CSDP centerline lengths (for more information, see Chapter 2 of the 2020 Annual Report at https://data.cnra.ca.gov/dataset/dsm2/resource/010599fd-6d3c-42a6-bade-37822d4aa486). - Added reservoirs to represent the Yolo Flyway, Decker Island, and Tule Red restoration areas - Added channels to represent the Lindsey Slough restoration area. - Added a channel to connect the two branches of Paradise Cut. - Added channels to connect the Yolo Flyway, Decker Island, and Tule Red Restoration areas to the model grid. - Added layered reservoir input for all reservoirs. - Added channels for the Yolo Toe Drain, aka Prospect Slough. - Added Yolo Toe Drain inflow data as a boundary inflow. - Removed low flows from Calaveras flow input (lower flows don't make it to the Delta). This release contains time series inputs from the 2022 DSM2 historical release, with the following changes: - removed lower flow values from Calaveras River inflow time series. These lower flows do not actually make it to the Delta. - Added a time series for Yolo Toe Drain (aka Prospect Slough) inflow. Source Code: DSM2 HYDRO, QUAL, and PTM: https://github.com/CADWRDeltaModeling/dsm2/releases/

The current release DSM2 V8.2.1 differs from the previous release DSM2 V8.2.0 as follows: ========================================================================= 1. An updated grid map is included. 2. ECO-PTM is included in the current release. 3. DCD and SMCD packages are included. 4. The historical setup includes new SMCD results and updated output locations.

The current release DSM2 v8.2.2 differs from the previous release DSM2 v8.2.1 in that a bug in ECO-PTM was fixed. Specifically, ECO-PTM in DSM2 v8.2.2 improves the channel selection algorithm so that when particles encounter a gate or barrier that has no open culverts or weirs, they will not cross the gate or barrier.

DSM2 Version "DSM2 Input 2025-07-03 historical update" is based on "DSM2 Input 2025-05-28", and includes the following improvements: * Corrections to SMSCG time series input for the RADIAL_FRACT_UP and RADIAL_FRACT_DOWN time series. * Modified pipe coefficients for False River Barrier and the South Delta Temporary Barriers. Previously, some of these coefficients were greater than 1.0, which is used in SCHISM to simulate barrier leakage. Since barrier leakage in DSM2 is simulated differently, the coefficients do not need to be greater than 1.0. Source code and executables: DSM2 HYDRO, QUAL, and PTM: https://github.com/CADWRDeltaModeling/dsm2/releases/ DSM2 input 2025-07-03 release: https://data.cnra.ca.gov/dataset/dsm2-input-2025-07-03-historical-update

Files related to the 2020 calibration of DSM2 v 8.2.0

DSM2 Version "DSM2 Input 2025-07-03 historical update" is based on "DSM2 Input 2025-05-28", and includes the following improvements: * Corrections to SMSCG time series input for the RADIAL_FRACT_UP and RADIAL_FRACT_DOWN time series. * Modified pipe coefficients for False River Barrier and the South Delta Temporary Barriers. Previously, some of these coefficients were greater than 1.0, which is used in SCHISM to simulate barrier leakage. Since barrier leakage in DSM2 is simulated differently, the coefficients do not need to be greater than 1.0. Source code and executables: DSM2 HYDRO, QUAL, and PTM: https://github.com/CADWRDeltaModeling/dsm2/releases/ DSM2 input 2025-07-03 release: https://data.cnra.ca.gov/dataset/dsm2-input-2025-07-03-historical-update

DSM2 historical data updated through December 31, 2021

DSM2 version 8.3.1

DSM2 version 8.3.1

DSM2 V8.2.0 employs the daily DCD channel depletions instead of the monthly values produced by DICU as in the previous release.