William J. Waltman

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Drought affects virtually all regions of the world and results in significant economic, social, and environmental impacts. The Federal Emergency Management Agency estimates annual drought-related losses in the U.S. at $6--$8 billion, which is more than any other natural hazard. Congress enacted the Agricultural Risk Protection Act of 2000 to encourage the(More)
The National Agricultural Decision Support System (NADSS) is a joint project with the U.S. Department of Agriculture and the University of Nebraska-Lincoln. The initial focus of the NADSS project is to improve the quality and accessibility of drought related knowledge, information, and data for drought risk management. At the core of the NADSS project is a(More)
This paper presents an overview of the motivation for, and the use of time-series data mining in, a Geospatial Decision Support System (GDSS). Our approach is based on a combination of time-series data mining algorithms and spatial interpolation techniques. The initial focus of the system is to facilitate drought risk management. We develop two association(More)
Results of a set of four regression models applied to recent survey data of farmers in eastern Nebraska suggest the causes that drive farmer intentions of using weather and climate information and forecasts in farming decisions. The model results quantify the relative importance of attitude, social norm, perceived behavioral control, and financial(More)
The National Agricultural Decision Support System (NADSS) is a web based geospatial decision support system used to aid producers and decision makers in analyzing and effectively mitigating the effects of drought. The NADSS application is unique in its implementation, containing web-based implementations of commonly utilized drought indices including the(More)
W.J. Waltman, S. Goddard, P.E. Read, S.E. Reichenbach, I.J. Cottingham, and J.S. Peake 115 Ferguson Hall, Dept. of Computer Science and Engineering , Dept. of Agronomy & Horticulture University of Nebraska-Lincoln, Lincoln, NE 68583-0195. Durham Science Center, Department of Geology-Geography, University of Nebraska-Omaha, Omaha, NE 68182-0199(More)
The agricultural landscapes of Nebraska reflect a complex pattern of soil climate regimes and inherent variability that influence the cropping systems, behavior of farmers, and the health and sustainability of rural communities. The USDA crops and soils databases were coupled with the Enhanced Newhall Simulation Model (ENSM) to explain spatial relationships(More)
GIS-based decision-support systems are powerful, new tools for assessing inherent soil productivity and potential erosion. This study integrates digital soil survey (SSURGO) information, climate, LandSat TM-derived land cover, and 30m digital elevation data (NEDS) to spatially model regions of soil productivity and highly erodible lands in Polk County,(More)