2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 2:30 PM - 2:45 PM | REAL-TIME NITRATE DATA PROVIDE INSIGHTS INTO NITRATE-N EXPORT DURING STORMS IN TWO CONTRASTING AGRICULTURAL WATERSHEDS | 306A
REAL-TIME NITRATE DATA PROVIDE INSIGHTS INTO NITRATE-N EXPORT DURING STORMS IN TWO CONTRASTING AGRICULTURAL WATERSHEDS
Accurately estimating watershed nutrient export can be challenging as traditional monitoring approaches using grab samples often underestimate nutrient loads during storms. Continuous nitrate-N sensors offer an opportunity to examine nutrient dynamics on a more resolved temporal scale that could help document benefits of conservation and restoration. We deployed continuous nitrate-N sensors in two agricultural watersheds in northern Indiana where agricultural conservation practices are being adopted at the watershed scale. We used the high-resolution data to evaluate nitrate-N export during storms in the Shatto Ditch (SDW) and Kirkpatrick Ditch Watersheds (KDW). Nitrate-N loads varied with storm size in SDW and increased linearly with storm size until direct runoff was >80% of total flow, yet there was no dilution effect in SDW. In contrast, in KDW, nitrate-N concentrations decreased during large storms suggesting dilution. Despite minimal increase in nitrate-N concentrations with the largest storms in both watersheds, we observed significant increases in nitrate-N loads leaving both watersheds. High-resolution nutrient data will be critical in quantifying the impacts of conservation by improving estimates of nutrient export during critical periods such as storms.
- C10 Biogeochemistry
- C24 Eutrophication
- C10 Biogeochemistry
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Shannon Speir
(), University of Notre Dame, sspeir@nd.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jennifer L. Tank
(), University of Notre Dame, tank.1@nd.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Todd V. Royer
(), Indiana University Bloomington, troyer@indiana.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Ursula H. Mahl
(), University of Notre Dame, umahl@nd.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Matt Trentman
(), Flathead Lake Biological Station, University of Montana, matt.trentman@flbs.umt.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Brittany Hanrahan
(), USDA Agricultural Research Service, br.hanrahan@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Kara Prior
(), Indiana University, kprior@indiana.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Sheila Christopher
(), University of Notre Dame, sheila.christopher@nd.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -