Hydrologic Simulations of the Maquoketa River Watershed Using SWAT Working Paper 09-WP 49,June 2009

This paper describes the application of the Soil and Water Assessment Tool (SWAT) model to the Maquoketa River watershed, located in northeast Iowa. The inputs to the model were obtained from the Environmental Protection Agency’s geographic information/database system called Better Assessment Science Integrating Point and Nonpoint Sources (BASINS). Climatic data from six weather stations located in and around the watershed, and measured streamflow data from a U.S. Geological Survey gage station at the watershed outlet were used in the sensitivity analysis of SWAT model parameters as well as its calibration and validation for watershed hydrology and streamflow. A sensitivity analysis was performed using an influence coefficient method to evaluate surface runoff and base flow variations in response to changes in model input hydrologic parameters. The curve number, evaporation compensation factor, and soil available water capacity were found to be the most sensitive parameters among eight selected parameters when applying SWAT to the Maquoketa River watershed. Model calibration, facilitated by the sensitivity analysis, was performed for the period 1988 through 1993, and validation was performed for 1982 through 1987. The model performance was evaluated by well-established statistical methods and was found to explain at least 86% and 69% of the variability in the measured stream flow data for the calibration and validation periods, respectively. This initial hydrologic modeling analysis will facilitate future applications of SWAT to the Maquoketa River watershed for various watershed analysis, including water quality.

GIS - Based Decision and Outreach Tools for Aggregate Source Management, September 2008

This research project combined various datasets, existing and created for this project, into an Interactive Mapping Service (IMS) for use by Iowa DOT personnel, county planning and zoning departments and the public in order to make more informed decisions regarding aggregate sources and future access to them. Iowa DOT Technical Advisory Committee meetings were held, along with public forum presentations, in order to understand better the social, ecological and economic limitations to extracting aggregate. The information needed by potential users was conveyed and integrated into a single informational source, the Aggregate Planning IMS.

A Review of Urban Geocoding,1973.

The purpose of this report is to describe and evaluate recent efforts in spatial referencing problems and to assess the utility of the developments for urban research, particularly. and to speculate on future developments in the field attempting to structure the issues and review literature and directions of what has become known as "geocoding."

Final Planning Report for City of Boone, Iowa, 1962, Vol. 1

This is volume 1 of the final report on the Comprehensive Plan for the City of Boone. Contained in this report are reproductions of the important maps and charts prepared in connection with this study.

Final Planning Report for City of Boone, Iowa, March 1962, Vol. 2

This is volume 2 of the final report on the Comprehensive Plan for the City of Boone. Contained in this report are reproductions of the important maps and charts prepared in connection with this study.

Final planning report for City of Boone, Iowa, 1962, Vol. 3

This is volume 3 of the final report on the Comprehensive Plan for the City of Boone. Contained in this report are reproductions of the important maps and charts prepared in connection with this study.

Acreage Answers, April-May 2000, Vol. 1, No. 2

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Answers, April-May 2001, Vol. 2, No. 2

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Answers, February-March 2001, Vol.2, no.1

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Answers, January 2000, Vol. 1, no.1

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Answers, April-May 2001, Vol. 2, no.3

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Living, December 2003-Jaunary 2004

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Living, June-July 2003

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Answers, April-May 2003, Vol. 4, no. 2

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.

Acreage Living, April 2008

Newsletter for those who reside on acreages in Iowa. Produced by the Iowa State University Extension Office.