DOI: 10.5061/dryad.bd157bv
title: Data from: Long-term agroecosystem research in the Central Mississippi River Basin: Goodwater Creek Experimental Watershed and regional herbicide water quality data

description: PLEASE NOTE, THESE DATA ARE ALSO REFERRED TO IN ANOTHER PUBLICATION.
 PLEASE SEE http://doi.org/10.2134/jeq2013.12.0518. Goodwater Creek
 Experimental Watershed (GCEW) has been the focus area of a long-term
 effort to document the extent of and to understand the factors controlling
 herbicide transport. We document the datasets generated in the 20-yr-long
 research effort to study the transport of herbicides to surface and
 groundwater in the GCEW. This long-term effort was augmented with a
 spatially broad effort within the Central Mississippi River Basin
 encompassing 12 related claypan watersheds in the Salt River Basin, two
 cave streams on the fringe of the Central Claypan Areas in the Bonne Femme
 watershed, and 95 streams in northern Missouri and southern Iowa. Details
 of the analytical methods, periods of record, number of samples, study
 locations, and means of accessing these data are provided. In addition, a
 brief overview of significant findings is presented. A key finding was
 that near-surface restrictive soil layers, such as argillic horizons of
 smectitic mineralogy, result in greater herbicide transport than soils
 with high percolation and low clay content. Because of this, streams in
 the claypan soil watersheds of northeastern Missouri have exceptionally
 high herbicide concentrations and relative loads compared with other areas
 of the Corn Belt.
description: Herbicide, nutrient, and
 suspended sediment data for streams in the Devils Icebox and Hunters
 CavesThe data set contains
 concentration, load, and daily discharge data for Devils Icebox Cave and
 Hunters Cave from 1999 to 2002. The data are available in Microsoft Excel
 2010 format. Sheet 1 (Cave Streams Metadata) contains supporting
 information regarding the length of record, site locations, parameters
 measured, parameter units, method detection limits, describes the meaning
 of zero and blank cells, and briefly describes unit area load
 computations. Sheet 2 (Devils Icebox Concentration Data) contains
 concentration data from all samples collected from 1999 to 2002 at the
 Devils Icebox site for 12 analytes and two computed nutrient parameters.
 Sheet 3 (Devils Icebox SS Conc Data) contains 15-minute suspended sediment
 (SS) concentrations estimated from turbidity sensor data for the Devils
 Icebox site. Sheet 4 (Devils Icebox Load & Discharge Data) contains
 daily data for discharge, load, and unit area loads for the Devils Icebox
 site. Sheet 5 (Hunters Cave Concentration Data) contains concentration
 data from all samples collected from 1999 to 2002 at the Hunters Cave site
 for 12 analytes and two computed nutrient parameters. Sheet 6 (Hunters
 Cave SS Conc Data) contains 15-minute SS concentrations estimated from
 turbidity sensor data for the Hunters Cave site. Sheet 7 (Hunters Cave
 Load & Discharge Data) contains daily data for discharge, load, and
 unit area loads for the Hunters Cave site.c3.jeq2013.12.0516.ds1.xlsxStream water concentrations of herbicides and nutrients for sites in the northern Missouri and southern Iowa region, 1994 to 1999The data set contains stream water concentrations of herbicides and nutrients for 153 sites in the northern Missouri/southern Iowa region from 1994 to 1995 and additional data from 1996 to 1999 for 21 sites. The data are available in Microsoft Excel 2010 format. Sheet 1 (Metadata) of the file contains supporting information regarding the length of record, site locations, parameters measured, concentrations units, method detection limits, describes the meaning of zero and blank cells, defines the major land resource areas (MLRAs) of the region, and provides a link to the U. S. Geological Survey discharge data. Sheet 2 (Site names and locations) has a list of the site names by MLRA, river system, and site name. It also contains site locations, provided as Universal Transverse Mercator coordinates, drainage areas, and indicates which sites were co-located at U. S. Geological Survey gauge sites. Sheet 3 (Concentration Data) contains data for 15 herbicide and nutrient analytes along with the corresponding site name, river system, and MLRA.c3.jeq2013.12.0516.ds2.xlsx