Please join the Johnson County Green Team, Johnson County Soil and Water Conservation District staff and Iowa NRCS Soil Scientist Jason Steele as they demonstrate the Iowa NRCS Rainfall Simulator. The interactive mobile education display shows, on a small scale, the impacts of rainfall and runoff on conservation and land management practices. The demonstration, which is free and open to the public, will be held at 12:15 p.m. Tuesday, April 21, in the employee parking lot next to the Johnson County Administration Building, located at 913 S. Dubuque Street in Iowa City.
The simulator can simultaneously distribute rainfall on five different surfaces. The runoff from these scenarios is collected in glass jars that clearly show the results. For example, the rainfall simulator can highlight how keeping various amounts of residue, such as corn stubble, on the land surface can reduce sediment loss. The simulator also shows how cover crops can be effective, or how much runoff occurs on a solid surface such as an urban parking lot.
The simulator provides farmers, local watershed groups, and urban residents scientific information directly applicable to their land and helps inform neighbor-to-neighbor conversations related to water quality.