Journal article
Hydrograph separation of subsurface tile discharge
Environmental monitoring and assessment, Vol.191(4), pp.231-10
04/01/2019
DOI: 10.1007/s10661-019-7377-4
PMID: 30895458
Abstract
Baseflow is an important component of streamflow and watershed hydrologic budgets, yet quantifying the baseflow fraction of tile drainage has rarely been reported. In this study, we used two common hydrograph separation methods (local minimum method, recursive digital filter) to separate the discharge hydrographs from three drainage district tiles located in Iowa. Based on data collected from 2009 to 2013, annual baseflow ranged from 116 to 162 mm and comprised approximately 60% of the annual discharge. Baseflow was greatest during June (average of 34% of annual baseflow) and the March through August period produced 86% of the total annual baseflow. We found that the two methods of hydrograph separation produced similar results but the digital filter method was less erratic in estimating baseflow fraction. Study results can be used to better quantify hydrologic pathways in tiled landscapes and improve the design, implementation, and evaluation of nutrient reduction strategies.
Details
- Title: Subtitle
- Hydrograph separation of subsurface tile discharge
- Creators
- Keith E. Schilling - University of IowaChristopher S. Jones - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Environmental monitoring and assessment, Vol.191(4), pp.231-10
- Publisher
- Springer Nature
- DOI
- 10.1007/s10661-019-7377-4
- PMID
- 30895458
- ISSN
- 0167-6369
- eISSN
- 1573-2959
- Number of pages
- 10
- Language
- English
- Date published
- 04/01/2019
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984383311202771
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