AMES, Iowa—Iowa Learning Farms will host a webinar on Wednesday, April 1 at noon. This webinar will explore the relationship between stream channel incision and the depth to groundwater in riparian corridors.
Riparian buffers have the capacity to remove nitrogen from shallow groundwater in the riparian corridor, but this function depends on the denitrification potential of these areas. The highest potential for denitrification will occur in areas with available organic carbon and high levels of nitrate, where there is saturation of the riparian zone near the ground surface. Interactions between the shallow groundwater table and riparian vegetation will also remove nitrogen from groundwater through plant uptake. By determining the relationship between precipitation, evapotranspiration, stream stage and soil characteristics, it may be possible to better guide riparian buffer planning in order to maximize efficiency in areas where it is not possible to monitor groundwater depth. Streams with a higher degree of incision may be less likely to have elevated groundwater tables, reducing their potential for nitrate removal from shallow groundwater.
Hilary Pierce, an Extension Outreach Specialist with Iowa State University, will discuss this research project, which analyzed six sites in southwestern Minnesota.
To participate in the live webinar, shortly before 12:00 pm on April 1st:
Click this URL, or type this web address into your internet browser: https://iastate.zoom.us/j/364284172
Or, go to https://iastate.zoom.us/join and enter meeting ID: 364 284 172
Or, join from a dial-in phone line:
Dial: +1 312 626 6799 or +1 646 876 9923
Meeting ID: 364 284 172
The webinar will also be recorded and archived on the ILF website, so that it can be watched at any time. Archived webinars are available at https://www.iowalearningfarms.org/page/webinars.
A Certified Crop Adviser board-approved continuing education unit (CEU) has been applied for, for those who are able to participate in the live webinar. Information about how to apply to receive the credit (if approved) will be provided at the end of the live webinar.
Established in 2004, Iowa Learning Farms is building a Culture of Conservation by encouraging adoption of conservation practices. Farmers, researchers and ILF team members are working together to identify and implement the best management practices that improve water quality and soil health while remaining profitable. Partners of Iowa Learning Farms include the Iowa Department of Agriculture and Land Stewardship, Iowa State University Extension and Outreach, Leopold Center for Sustainable Agriculture, USDA Natural Resources Conservation Service, and Iowa Department of Natural Resources (USEPA section 319) and GROWMARK, Inc.
Hilary Pierce Jacqueline Comito
Extension Outreach Specialist ILF Program Director