New ArcSLAMM Version Released

Posted March 27, 2017, 7:41 p.m.

 A new version of ArcSLAMM package can be downloaded from The new version is linked from ArcSLAMM v2. Please read the description at that page. 


Iowa Water Center 2017 Conference Presentations

Posted March 27, 2017, 5:10 p.m.

John DeGroote and students Ben Gavin (undergraduate) and Aaron Padilla (graduate) presented results of an Iowa Department of Agriculture and Land Stewardship funded project at the 2017 Iowa Water Center conference in Ames on March 23-24, 2017. They presented (oral presentation by John and poster by students) progress on a project developing and applying GIS databases/custom tools that work with an urban stormwater model. The presentations detailed the tools and application to several urban watersheds in Iowa. 
Iowa Water Center Poster  


Presentation at Iowa Stormwater Summit

Posted Dec. 6, 2016, 6:53 a.m.

John DeGroote provided an overview of ArcSLAMM package to approximately 75 professionals at the 2nd Annual Iowa Stormwater Summit in Marion, IA on December 6, 2016. The presentation detailed the GIS tools/databases developed by the GeoTREE Center to make it easier to model urban runoff quantity/quality using industry standard WinSLAMM model. The Summit was put on by the Iowa Storm Water Education Program who invited the GeoTREE presentation.  Presentation at ISWEP


GeoTREE provides ArcSLAMM workshops

Posted Oct. 20, 2016, 6:57 a.m.

The UNI GeoTREE Center (John DeGroote and Research Assistants Garrett Jepsen and Aaron Padilla) and collaborator Rebecca Kauten provided three workshops in Ankeny, Dubuque, and Coralville. Approximately 40 attendees from local government (e.g. cities of Cedar Rapids, Dubuque, Coralville) watershed management and education groups (e.g. Easter Lake Watershed and Dry Run Creek Watershed Coordinators), and private engineering companies (e.g. Shive-Hattery, RDG Planning & Design). The workshops highlighted work the GeoTREE Center is doing under an Iowa Department of Agriculture and Land Stewardship grant to highlight custom ArcGIS tools the GeoTREE Center has developed for working with an urban stormwater modeling software. The workshops included example applications in several watersheds. The GIS tools as well as all modeling results for watersheds in Iowa will be made publicly available. 


IEDA Webinar on ISAM

Posted Sept. 8, 2016, 5:12 p.m.

John DeGroote presented a webinar in conjunction with Iowa Economic Development Authority (IEDA) Energy Office. The webinar presentation described the large data processing solar radiation modeling project the GeoTREE Center completed under an IEDA grant. The project resulted in a several order of magnitude more detailed mapping of solar radiation potential and a public facing web mapping application which can be accessed by anyone including individual property or business owners who would like to investigate solar potential of their property/building or solar installation companies who can use the application to do preliminary investigation of solar radiation potential anywhere in the state of Iowa. This web mapping application and underlying database are called the Iowa Solar Asset Mapping (ISAM) tool. The webinar was attended by individuals from academia, private companies, government agencies, and non-profit organizations. 

Register to watch the recorded webinar

ISAM application