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VARIANCE ESTIMATION FOR SPATIALLY BALANCED SAMPLES OF ENVIRONMENTAL RESOURCES
Citation:
Stevens, D. L. AND A R. Olsen. VARIANCE ESTIMATION FOR SPATIALLY BALANCED SAMPLES OF ENVIRONMENTAL RESOURCES. Presented at TIES/SPRUCE 2000 - International Environmetric Society/Statistics in Public Resources, Utilities, and in Care of the Environment, Sheffield, United Kingdom, September 4-8, 2000.
Description:
The spatial distribution of a natural resource is an important consideration in designing an efficient survey or monitoring program for the resource. We review a unified strategy for designing probability samples of discrete, finite resource populations, such as lakes within some geographical region; linear populations, such as a stream network in a drainage basin; and continuous, two-dimensional populations, such as forests. The strategy can be viewed as a generalization of spatial stratification. In this presentation, we develop a variance estimator based on that perspective. We illustrate the design strategy and variance estimator with a sample of Oregon coastal streams for coho salmon spawning density.