Comparison of the Soil-Plant-Air-Water Model and the Iowa State University-Effluent Limitation Guidelines Model to Replicate Holding Basin Performance
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Since 1905, the Department of Agricultural Engineering, now the Department of Agricultural and Biosystems Engineering (ABE), has been a leader in providing engineering solutions to agricultural problems in the United States and the world. The department’s original mission was to mechanize agriculture. That mission has evolved to encompass a global view of the entire food production system–the wise management of natural resources in the production, processing, storage, handling, and use of food fiber and other biological products.
History
In 1905 Agricultural Engineering was recognized as a subdivision of the Department of Agronomy, and in 1907 it was recognized as a unique department. It was renamed the Department of Agricultural and Biosystems Engineering in 1990. The department merged with the Department of Industrial Education and Technology in 2004.
Dates of Existence
1905–present
Historical Names
- Department of Agricultural Engineering (1907–1990)
Related Units
- College of Agriculture and Life Sciences (parent college)
- College of Engineering (parent college)
- Department of Industrial Education and Technology, (merged, 2004)
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
In Iowa, all open beef feedlot operations over 1,000 head are required to have runoff control systems. Iowa regulations allow the use of vegetative treatment systems (VTS) on open beef feedlots that meet regulatory siting requirements. For a National Pollutant Discharge Elimination System (NPDES) permit, the runoff control performance of VTSs must meet or exceed the performance of traditional runoff containment basins as predicted by the Iowa State University-Effluent Limitations Guideline (ISU-ELG) model. The ISU-ELG model is based on a model developed by Koelliker in 1975 to predict the performance of a holding basin at controlling feedlot runoff. In this paper, the criterion used to determine if a particular day is a “dewatering day” is investigated to determine its effect on basin performance, for wetter areas in Iowa the number of drying days has a large effect on basin performance, where as for the drier northwest region of Iowa this effect is limited. This paper compares results from the ISU-ELG model to results obtained using the Soil-Plant-Air-Water (SPAW) model to simulate traditional feedlot runoff containment basin performance. The SPAW model uses a soil moisture criterion to determine if conditions are acceptable for land application of basin effluent. The results show that the ISU-ELG model over-predicts performance of traditional containment systems in comparison to the SPAW model at all five locations investigated.
Comments
This is an ASABE Meeting Presentation, Paper No. 083839.