| Abstract: | Increasing baseflow and baseflow percentage over the second half of the 20th century in Iowa has contributed to increasing nitrate-nitrogen concentrations measured in Iowa rivers because nitrate is primarily delivered to streams as baseflow and tile drainage. The relation of baseflow and baseflow percentage to row crop land use was evaluated for 11 Iowa rivers and their watersheds for their period of streamflow record (58-73 years period). Results indicated increasing baseflow in Iowa‘s rivers is significantly related to increasing row crop intensity. A 13-52% increase in row crop percentage in many Iowa watersheds has contributed to an increase of 33-135 mm increase in baseflow and 7-31% increase in baseflow percentage. Limited historical water quality data from two larger Iowa rivers (Cedar and Raccoon rivers) suggest that increasing row crop land use over the 20th century has produced more baseflow and contributed to increasing nitrate concentrations in Iowa‘s rivers. ?? 2004 Elsevier B.V. All rights reserved. |
| Genre: | Article |
| ProdID: | 70029168 |
| Citation Author: | Schilling, K. E. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 438 |
| Citation Issue: | 1-2 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Agriculture, Ecosystems and Environment |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 6 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Relation of baseflow to row crop intensity in Iowa; 2005; Article; Journal; Agriculture, Ecosystems and Environment; Schilling, K. E. |
| Citation Start Page: | 433 |
| Citation Volume: | 105 |
| Citation Year: | 2005 |
| Type: | citation/reference |
| Text: | Relation of baseflow to row crop intensity in Iowa; 2005; Article; Journal; Agriculture, Ecosystems and Environment; Schilling, K. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.agee.2004.02.008 |
| Date Other: | Sat, 1 Jan 2005 00:00 -0600 |
| Publisher: | |
