SacPAS Fish Model

Criterion	Explanation
General Description	The SacPAS Fish Model begins with egg deposition at the time of spawning where development rate and survival are controlled by various methods to determine fry emergence timing and survival. The user controls temperature inputs, redd/carcass/adult counts, and survival details for egg development modeling. The output of this emergence sub-model becomes the input for a migration sub-model where flow drives movements and survival. The migration sub-model is based on the COMPASS model for the Columbia River.
Model Domain	Model domain is flexible but currently configured for winter-run Chinook Salmon in Sacramento River
Developer	Columbia Basin Research (University of Washington) for Bureau of Reclamation
Hardware computing requirements	Not specified
Code language	Not specified (but COMPASS written in C)
Original application	The Sacramento Prediction and Assessment of Salmon (SacPAS) data and analysis tools were developed specifically to assist managers and interested parties in understanding and forecasting salmon emergence, migration, and survival. It is a suite of integrated tools for data selection and manipulation, coupled to a spawning-to-emergence model and a juvenile migration model.
Public/proprietary and cost	Model is publicly available through web interface at no cost
Physically or empirically based	Mechanistic and empirical
Mathematical methods used	For the emergence timing sub-model, users can select from four options. One is a mechanistic model based on temperature and egg depletion. The other three options are empirical models taking polynomial, power, or linear forms. For the egg/juvenile survival sub-model, users can choose among three options. One option is constant survival. Another option includes temperature and a linear spawner density effect. The last option uses a Beverton-Holt spawner density effect. Empirical model of flow-velocity relationship. The in-river survival sub-model is based on the XT survival model but requires mapping XT model parameters to the internal survival parameters of the COMPASS model.
Input data requirements	The primary input data requirements are water temperature and temporal spawning distribution.
Outputs	Temporal distributions of spawning, fry emergence, fry arrival at RBDD, and fry arrival at Feather River. Total redds, total eggs, mean emergence day, and overall survival from egg to RBDD. Results can be exported from the web app as text files (CSV or TXT) and figures can be saved as image files (PNG).
Pre-processing and post-processing tools	No processing tools provided (aside from the web interface)
Representation of uncertainty	Uncertainty not incorporated
Prevalence	Bureau of Reclamation uses SacPas for in-season management of winter run Chinook Salmon.
Ease of use for public entities	Model is easily accessible through internet. No special hardware or training are required.
Ease of obtaining information and availability of technical support	No user group or commercial help desk
Source code availability	Not available
Status of model development	Model is available for immediate use. Calibration of in-river survival sub-model is ongoing. Future versions may include migration from other rivers, option to select other spawning grounds, and more control over parameters in egg development sub models.
Challenges for integration	The primary barrier to integration is that the source code is not publicly available. However, integration via the web interface is tractable.

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