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Spatial Representation of Agroclimatology in a Study of Agricultural Drought by Olga V. Wilhelmi; Kenneth G. Hubbard; Donald A. Wilhite is a Environmental Science article available to read on EtoBox.

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## Abstract Agricultural drought is the leading cause for crop failure throughout the world. In the USA, significant impacts of recent droughts on agricultural production indicate the continuing vulnerability of the country to drought. This paper presents a methodology for spatial representation of the agroclimatic component of agricultural drought vulnerability. This methodology was developed as a part of an integrated assessment of drought vulnerability. For the spatial analysis, the state of Nebraska was selected as a study area because of the considerable variation in climatology, soil characteristics, land use, and cropping patterns. The underlying approach assumes that the best spatial characterization of the state's agroclimatology from the agricultural drought vulnerability perspective is the probability of seasonal crop moisture deficiency. Seasonal crop water‐use thresholds for well‐watered crops (e.g. corn, soybean, and sorghum) were estimated using the evapotranspiration (ET) mathematical model. For wheat and grass, ET values were estimated based on the relationship between ET, water‐use efficiency, and crop yield. Historical grain yield data were analysed to define an

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Author

Olga V. Wilhelmi; Kenneth G. Hubbard; Donald A. Wilhite

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0899-8418)

Published

2002

Language

EN

Field

Environmental Science (Physical Sciences)