Zachary Kisfalusi Masters Thesis Research 100915 Overview Introduction Hypotheses Study Site Methods Results Discussion Conclusions Future Work Temperature An effective proxy to measure interactions ID: 728372
Download Presentation The PPT/PDF document "The effects of tile drain input on a gai..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
The effects of tile drain input on a gaining stream: Using a thermal end member mixing model and a statistical analysis approach
Zachary Kisfalusi
Master's Thesis Research
10/09/15Slide2
OverviewIntroductionHypothesesStudy SiteMethods
Results
Discussion
ConclusionsFuture WorkSlide3
Temperature An effective proxy to measure interactions (Baskaran et al., 2009,
Stonestrom
and Constantz, 2004)
Seasonal vs diurnal
variations
(Silliman and Booth, 1992; Peterson and Sickbert, 2006)Surface water experiences diurnal variations and large seasonal changeNear-surface GW is more constant with a muted and lagged effect from seasonal and diurnal alterationsSlide4
Agricultural settingLarge amounts of contaminant runoff from fertilizers Decoupled hydrologic cycle due to tile drains (Sickbert and Peterson, 2014)Tile drain inputs interfere and influence the water chemically and thermallySlide5
HypothesesThe thermal input from the tile-drain will have no effect on stream temperature.Though, during low frequency, high magnitude precipitation events, the tile drain input is expected to influence the stream temperature.Slide6
Study SiteT3 is a semi-natural, low-order gaining streamOne known direct tile drain inputThe reservoirs to be studied: GW aquifer to the east, the tile drain, upstream and downstream of inputSlide7
Tile diversion
zone east of stream for nitrate removal
Drains 65 acre
farm
Larger project to look at tile diversion
GW signature from 13 & 15 along with from diversion boxSlide8
MethodsTemperature 150 HOBO Pendant loggers spaced at every 50 cm in streamOne logger in each well (2 in riparian and 12 in hyporheic) and 1 in the tile directly
Record data every 15 minutes
Discharge
Velocity measured using a flow meter and the cross-sectional area of stream
Taken at 3 locations (Hyporheic wells)
Q
GW=
Q
out
-
Q
in-
Q
tileSlide9Slide10
Time seriesConstant groundwater thermal signatureSampling dates visible by spikesLarge diurnal changes evident in stream temperatureWeather fronts evident
Tile is constant throughout summer
Noise at end due to composition of diversion boxSlide11
Stream correlation to tile flowTemperature data from Dec. 2014-Sept. 2015Tile warmer than stream in winter
Chaos in spring; 1:1 otherwise
Post-diversion has
1:1 ratio within an envelopeSuspected tile influenceSlide12
ConclusionsThermal signature of tile is more constant throughout dataset similar to groundwaterTile drain input does seem to have an effect on the temperature variance of the stream when comparing upstream to downstream between April and early JulySlide13
Future workPull data loggers in DecemberQuantify hyporheic exchange, groundwater influence on stream, using HZ temperature loggersPerform a statistical analysis on datasetInterpret full dataset for seasonal changes on stream due to tile flowDetermine if mass or variance in temperature play a larger role in the influence of tile drains on streamsSlide14
AcknowledgementsPrimary Advisor – Dr. Eric W. PetersonThesis Committee – Dr. Catherine M. O’Reilly & Dr. Dagmar Budikova
Persaud
City of Bloomington - Richard
TwaitIllinois Groundwater Association, Geological Society of America, Illinois State Graduate School, and ISU Department of Geography-Geology Powell Club for financial support
Current and past graduate and undergraduate students of Illinois State University for assistance throughout the last year
Tamru
Taye for assistance in the field, conceptual model, and project collaborationEileen Maxwell for background dataKelly
Sanks and Tyler Rothschild for field support Many others for assistance in the field since December 2014-PresentSlide15
Thank you for your time.Questions?