Model Documentation

Model Data Sets






The states of Nebraska, Wyoming, and Colorado, and the US Department of the Interior have entered into a
Cooperative Agreement (CA) partnership to address endangered species (whooping crane, piping plover,
least tern, pallid sturgeon) issues affecting the Platte River Basin. The initiative has two major purposes:

Recovery Implementation Program

Endangered Secies Act

To develop and implement a "recovery implementation
program" to improve and conserve habitat for four
threatened and endangered species that use the
Platte River in Nebraska.

To enable existing and new water uses in the
Platte River Basin to proceed without additional
actions required for the four species under the
Endangered Species Act.


Section 0 - Table of Contents & Executive Summary

Need a place to start? Read the Executive Summary located here.

Section 1 - Introduction

Learn about the COHYST background, goals and objectives, project
organization and gain an overview of the 2017 Model documentation

Section 2 - Project Setting

Learn about the physical and human settings, and institutional

Section 3 - Model Overview

Learn about the conceptual model, observed water balance, model
integration and modeling processes.

Section 4 - Datasets

Learn about the model datasets used by COHYST.

Section 5 - Watershed Model

Learn about how the Watershed Model partitions precipitation and
irrigation water sources into crop consumption, recharge, and runoff
based on a variety of model inputs.

Section 6 - Surface Water Model

Learn about the Surface Water model, which tracks how water is diverted
from the river and used to meet crop demands and generate power.

Section 7 - Groundwater Model

Learn about how the Ground Water Model takes inputs from the
Watershed Model and Surface Water model and computes the impact
on ground water levels and aquifer/stream interactions.

Section 8 - Integrated Model

Learn about how COHYST uses the Watershed, Surface Water, and
Groundwater Model to develop an integrated model which models
the entire water budget.

Section 9 - Model Evaluations

Learn about how well the COHYST model met its goals, and what
limitations it has in future use.

Section 10 - Model Applications

Learn about how the COHYST Model can be applied to a variety of
different modeling applications.

Section 11 - References

Need a reference citation? You'll find it here.

Section 12 - Links to Data Files

Links to data files used throughout the modeling effort can be found in this section.

Model Documentation Appendices

Didn't find what you were looking for in the documentation and want more
information? Try the appendices.

Full Documentation Report (140 mb)

Prefer to have the entire report and all the appendices in one document? You can find all 1700 pages here.


Full Model Dataset Download - 7.8 GB

All of the required model datasets needed to run the model. Includes
Watershed Model inputs, Surface Water Model Stella Model, Ground
Water MODFLOW model, and GUI used to link all three models.

Watershed Model Source Code

Looking for the Watershed Model source code? Get it here. Best edited
and compiled with Microsoft Visual Studio (not included).

Surface Water Model - Stella Only

Looking for just the Surface Water Model? Download the Stella Model
here. You'll need a Stella License to open it (not included).

Groundwater Model - MODFLOW

Want to run the Groundwater Model on its own? Get the MODFLOW 2005
model inputs here. Can be run with MODFLOW 2005, or by importing
into Ground Water Vistas (not included, hint, load the .RCH and .WEL
file separately from the others).


Archive Files

Looking for old items? You can find them here. Includes prior datasets.



Model Documentation

Model Data Sets