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Chris Jones
University of Iowa-IIHR
IIHR’s Continuous Monitoring Network and
Water Quality Information System
Unit of the College of Engineering
Director: Larry Weber
90 Graduate Students from 16 countries
61 Research Engineers and Scientists
Engineering Research Center since 1920
Municipal Water Supply Projects
• Boone Water Works
• Ottumwa Water Works
• Rural Water System #2 (Hospers, IA)
• City of Sioux Center
• Rock Valley Rural Water
University of Iowa’s Water Quality Information System
Chris JonesResearch Engineer
christopher-s-jones@uiowa.edu319-335-0589
Raccoon River at Van Meter, 2006
2008: Four nitrate sensors purchased by IIHR through a contribution from the Carver Trust
IIHR engineers developed own data logging and device control systems to record and relay data to Iowa City or Mississippi River Research station at Muscatine
Network Expansion
2012: 7 sensors deployed in Lower Iowa River Watershed
2013: 3 sites added , equipment purchased with funding from HUD, deployment in
Otter Creek and Slough Creek Wetland (NE Iowa) and Skunk River at Augusta
2014: 12 more deployments, funding from HUD and INRC. 22 sites total
2015: 28 sites total, funding from HUD, INRC, City of Dubuque, and IDNR
IIHR 2016 Real-Time Monitoring Network
About 80% of the water leaving the state will be monitored for nitrate in 2016.
Iowa has 1/3 of all the continuous nitrate monitors in the U.S.
Typical Deployments
Monitoring Objectives
• Generate credible data for science and policy
• Practice Assessment
• Water Quality and Hydrologic Research
• Quantify loads for Nutrient Reduction Strategy
http://s-iihr50.iihr.uiowa.edu/iwqis/app/?demo=2016-06-06
New Sites 2017
• Cedar Rapids WWTP (also Phosphax)
• Rock River near Hawarden
• Yellow River near Ion
• Soldier River near Pisgah
• Upper Iowa River near Dorchester
• Gere Creek
• CERA (Grinnell College)
Publications• Jones et al.. “Nitrate transport and supply limitations quantified using high-
frequency stream monitoring and turning point analysis.” Submitted, Journal of Hydrology.
• Arenas, A. et al. “Estimation of tile drainage contribution to streamflow and nutrient loads at the watershed scale based on continuously monitored data.” Submitted, Environmental Monitoring and Assessment.
• Jones, Christopher, Sea-Won Kim, and Keith Schilling. "Use of continuous monitoring to assess stream nitrate flux and transformation patterns." Environmental Monitoring and Assessment 189.1 (2017): 35.
• Jones, C. S., et al. "Crop rotation and Raccoon River nitrate." Journal of Soil and Water Conservation 71.3 (2016): 206-219.
• Reynolds, Kaycee N., et al. "Optimizing Sampling Strategies for Riverine Nitrate Using High-Frequency Data in Agricultural Watersheds." Environmental science & technology 50.12 (2016): 6406-6414.
• Davis, Caroline A., et al. "Antecedent moisture controls on stream nitrate flux in an agricultural watershed." Journal of environmental quality 43.4 (2014): 1494-1503.
• Feng, Zhujing, Keith E. Schilling, and Kung-Sik Chan. "Dynamic regression modeling of daily nitrate-nitrogen concentrations in a large agricultural watershed." Environmental monitoring and assessment 185.6 (2013): 4605-4617.
Manchester
Big Spring
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5
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25
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/28
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/25
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mg
/L N
Manchester and Big Spring NO3-N
Manchester Big Spring
12.4
3.6
15.6
18.9
15.6
25.0
0
5
10
15
20
25
30
ave min max
mg/
L N
Big Spring vs Manchester NO3-N
Big Spring Manchester
July 23-24 Big Spring
Odp
shaly carbonate rocks
shale
St. Peter Sandstone
Osp
Silv
er
Cre
ek
Ro
bert
s C
ree
k
Q
Q
Q
Q
Q
Og
Og
Og
Omf
Omf
Omf
Omf
Top of
potentiometric
Base of Galena
Gro
und
wate
rflow
Elevationin
meters feet400
350
300
250
1200
1150
1100
1050
1000
950
900
850
800
700
750
650
Sinkhole AreaSinkhole Area
GroundwaterDivide
GroundwaterDivide
Galena
A C
alluviumGalena
How
ard
Cre
ek
B
SU
Q
1 1/2 0 1 mile
1 1/2 0 1 kilometer
Quaternary depositsundiferentiated loess, till, etc.
Holocene alluvium(stream deposits)
Silurian dolomitesSU
Omb
Omf
Og
Odp
Osp
Maquoketa Formation
Maquoketa Formation
Brainard Shale Member
Ft. Atkinson, Clermont, and Elgin Members
Galena carbonate rocks
Decorah, Platteville,and Glenwood Fms.
St. Peter Sandstone
Shakopee FormationOsh
Osh
Q
GEOLOGIC UNITS
Big Spring vs Roberts Creek, 2000 vs 2016
Real-Time oP monitoring
Surrogates for TP
Surrogates for TP
Regression equations developed for 43 Iowa stream sites using turb, oP, q, and Chloride
Surrogates for TP
Questions?
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