Quantifying the contribution of tile drainage to basin-scale water yield using analytical and numerical models

dc.contributor.author Schilling, Keith E.
dc.contributor.author Gassman, Philip W.
dc.contributor.author Arenas-Amado, Antonio
dc.contributor.author Jones, Christopher S.
dc.contributor.author Arnold, Jeff
dc.contributor.department Center for Agricultural and Rural Development
dc.contributor.department Iowa Nutrient Research Center
dc.date.accessioned 2022-01-19T16:24:00Z
dc.date.available 2022-01-19T16:24:00Z
dc.date.issued 2019-03
dc.description.abstract The Des Moines Lobe (DML) of north-central Iowa has been artificially drained by subsurface drains and surface ditches to provide some of the most productive agricultural land in the world. Herein we report on the use of end-member mixing analysis (EMMA) models and the numerical model Soil and Water Assessment Tool (SWAT) to quantify the contribution of tile drainage to basin-scale water yields at various scales within the 2370 km2 Boone River watershed (BRW), a subbasin within the Des Moines River watershed. EMMA and SWAT methods suggested that tile drainage provided approximately 46 to 54% of annual discharge in the Boone River and during the March to June period, accounted for a majority of flow in the river. In the BRW subbasin of Lyons Creek, approximately 66% of the annual flow was sourced from tile drainage. Within the DML region, tile drainage contributes to basin-scale water yields at scales ranging from 40 to 16,000 km2, with downstream effects diminishing with increasing watershed size. Developing a better understanding of water sources contributing to river discharge is needed if mitigation and control strategies are going to be successfully targeted to reduce downstream nutrient export.
dc.description.comments This article is published as Schilling, Keith E., Philip W. Gassman, Antonio Arenas-Amado, Christopher S. Jones, and Jeff Arnold. "Quantifying the contribution of tile drainage to basin-scale water yield using analytical and numerical models." Science of The Total Environment 657 (2019): 297-309. doi:10.1016/j.scitotenv.2018.11.340. Posted with permission of INRC. Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/jw27POGv
dc.language.iso en
dc.source.uri https://doi.org/10.1016/j.scitotenv.2018.11.340 *
dc.subject.disciplines DegreeDisciplines::Life Sciences::Agriculture
dc.subject.disciplines DegreeDisciplines::Physical Sciences and Mathematics::Earth Sciences::Soil Science
dc.subject.disciplines DegreeDisciplines::Physical Sciences and Mathematics::Environmental Sciences::Water Resource Management
dc.subject.keywords Artificial drainage
dc.subject.keywords Tiles
dc.subject.keywords End member mixing analysis
dc.subject.keywords EMMA
dc.subject.keywords SWAT
dc.subject.keywords Iowa
dc.subject.keywords Agriculture
dc.title Quantifying the contribution of tile drainage to basin-scale water yield using analytical and numerical models
dc.type Article
dspace.entity.type Publication
relation.isOrgUnitOfPublication 1a6be5f1-4f64-4e48-bb66-03bbcc25c76d
relation.isOrgUnitOfPublication 2f553ce8-7236-41ae-86cd-837e75627a2f
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