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PEWI: A Dynamic Land Use & Ecosystem Service Tradeoffs Assessment ToolRobert Valek, Lisa Schulte Moore, John Tyndall | Iowa State University, Ames, Iowa, USA
What is PEWI? Learning Goals Try it Out
Funding from The McKnight Foundation, US Forest Service Northern Research Station, Iowa State University Department of Agronomy, Leopold Center for Sustainable Agriculture, and USDA McIntire-Stennis Program have supported
development of PEWI. We thank Assata Caldwell, Cindy Cambardella, Carrie Chennault, Justin Choe, Diane Debinski, Ranae Dietzel, Stephanie Enloe, Ryan Frahm, Nancy Grudens-Schuck, Emily Heaton, Matt Helmers, Noah Hagen, Jake Hill,
Michael Hofmockel, Tom Isenhart, Charlie Labuzzetta, Matt Liebman, Devan McGranahan, Elise Miller, Larysa Nadolny, Laura Roy, Nancy Shyrock, John VanDyk, and the Natural Capital Project for contribution to PEWI’s development and review.Acknowledgements
Land-use Options in PEWI
Play OnlineTo play, access background information,
or download learning exercises:
nrem.iastate.edu/pewi
PEWI 3.0 includes an in-game glossary with
relevant definitions and explanations to assist
users and inform the learning process.
Conservation
Corn
Conservation
Soybean
Mixed Fruits
& Vegetables
Herbaceous
Perennial
Bioenergy
Rotational
Grazing
Prairie
Conservation
Forest
Short-rotation
Woody
Bioenergy
Learning Ecologically Complex Interactions
PEWI puts the user in the driver’s seat to creatively
imagine alternative land-use configurations. Outputs
dynamically respond to constraints in the biophysical
environment and user’s land use choices.
The 2400-ha (6000-ac) watershed in PEWI is based on
the physiographic characteristics of two Iowa
landforms: the Des Moines Lobe landform and
Southern Iowa Drift Plain.
Each landform presents unique challenges to users in
achieving their agricultural and environmental goals.
These goals take shape as users annually design the
watershed with 15 available land uses over 3 years.
Experimenting with Trade-offs
PEWI users consider both
synergies and tradeoffs
among the multiple
objectives they hold for
agricultural landscapes.
Develop Land-use Scenarios
Conservation crops
with strategic land use
Conservation &
alternative crops with
strategic land use
Traditional corn &
soybean system
Example 1
Example 2
Example 3
Interactively Evaluate Results
Physical Features:
Soil Class and Drainage
Class are 2 of 5 physical
features in PEWI.
Weather Variability: Each year, users
randomly encounter 1 of 7 annual
precipitation levels.
Responding to Geographic & Interannual Variability
Agriculture Production of annual and perennial
crops & livestock
Biodiversity Habitat for native species & game
wildlife
Soil Soil erosion & control, soil carbon
sequestration
Water In-stream nitrate, phosphorus &
sediment delivery
Conventional
Corn
Conventional
Soybean
Alfalfa
Grass Hay
Permanent
Pasture
Wetland
Conventional
Forest
PEWI, short for People in Ecosystems/Watershed
Integration, is a simple web-based learning tool
to help people understand human-landscape
interactions. PEWI addresses our need to
balance agricultural production with other
environmental benefits, including clean water,
abundant wildlife, and recreation. While PEWI
focuses on the US Corn Belt, its lessons apply to
agricultural regions across the globe.
The results of user
watershed designs
can be evaluated in
three ways:
(Above) through interactive plots, (Right)
through numerical scores, and (Left) for a
subset of scores, through mapped output.
Interface Customizations
Multiplayer Map
Divisions
Customize
Sandbox Interface
Restrictions