Small Area Estimation in a Watershed Erosion Assessment Survey
نویسندگان
چکیده
This article describes an applicationof small area estimation in a survey conducted in the Rathbun Lake Watershed in Iowa (USA). From a sample of 183 plots in the watershed, erosion from four sources as well as total erosion are estimated for 61 small areas within the study region. Information on land cover and topography from GIS coverages are used to create plot-level covariates for the regressionmodel. Two estimators are discussed in the article: an empirical best linear unbiased predictor and a composite estimator. The latter estimator is potentially less ef cient than the former, but preserves the additivity between the estimates for the four erosion sourcesand the total erosion.For this survey, the estimated ef ciency loss is shown to be very small.
منابع مشابه
Preprint #01-21 SMALL AREA ESTIMATION IN A WATERSHED EROSION ASSESSMENT SURVEY by
This article describes an application of small area estimation in a survey conducted in the Rathbun Lake Watershed in Iowa (USA). The estimator considered is an extension of the mixed effects regression model of Battese, Harter and Fuller (1988). From a sample of 183 plots in the watershed, erosion from four sources as well as total erosion are estimated for 61 small areas within the study regi...
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