I. Introduction

CRiSP.1 describes in detail the movement and survival of individual stocks of natural and hatchery-spawned juvenile salmonids through hundreds of miles of river and up to nine dams. Constructed from basic principles of fish ecology and river operation, CRiSP.1 provides a synthesis of current knowledge on how the major hydroelectric system in the country interacts with one of its major fisheries. Biologists, managers and others interested in the river system can use this interactive tool to evaluate the effects of river operations on smolt survival.

There are two modes that CRiSP.1 can use: a Scenario Mode that illustrates the interactions of model variables, and a Monte Carlo Mode, which is stochastic, providing measures of variability and uncertainty in predicted passage survival. Between any two points in the river system, estimates of probability distributions for survival and travel time can be determined for any stock.

CRiSP.1 has advanced programming features including:

• graphical interface to access and change model variables and equations
• flexible data structure that allows expansion of the model while assuring backwards compatibility with earlier versions
• reconfigurability to a different river without reprogramming
• on-line help tool
• on-line tutorials.

CRiSP.1 was developed at the University of Washington's Center for Quantitative Science under a contract from the Bonneville Power Administration's (BPA) Fish and Wildlife Division.