IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Comprehensive analysis of hydrologic processes and nitrate concentrations at the watershed scale bas...
Comprehensive analysis of hydrologic processes and nitrate concentrations at the watershed scale based on continuous monitoring data
Mitigation of flood related damages and improvements to stream water quality require a thorough understanding of the
relation between hydrologic processes and stream nutrient concentrations. Recent advances in technology allow for
collection of high frequency data that can shed light on the interactions between surface water, groundwater, and water
quality. In this study we analyzed nutrient concentrations, precipitation, soil water content, discharge, and groundwater
levels collected every 15 minutes in the Otter Creek (122 km2) a watershed in the State of Iowa, USA. We focused on
the timing of different processes that occur at the watershed scale, from the onset of precipitation and early soil moisture
changes, to production of runoff that leads to subsequent peak discharge and nutrient concentration. We propose a
methodology based on time series slope thresholds that has the potential to enhance flood preparedness in areas prone
to flash floods. Stream nutrient concentration trends were correlated with land cover, subsurface drainage, and LIDAR
data. Measured data are also being used to calibrate a physically-based watershed model and numerical results from
this model are presented in a companion paper entitled ˇ°Quantitative assessment of flood damage reduction projects
through physically-based watershed modelsˇ±.
File Size : 2,647,527 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 18/08/2015
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