Spatial Prediction and Uncertainty Analysis of Topographic Factors for the Revised Universal Soil Loss Equation (RUSLE)
Spatial prediction and uncertainty assessment of ecological modeling and simulation systems are a difficult task because of system complexities that include multi components, their interaction and variability over space and time. Developing a general methodology and framework of uncertainty assessme...
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Published in | Journal of soil and water conservation Vol. 55; no. 3; pp. 374 - 384 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Ankeny, IA
Soil and Water Conservation Society
01.07.2000
Soil & Water Conservation Society |
Subjects | |
Online Access | Get full text |
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Summary: | Spatial prediction and uncertainty assessment of ecological modeling and simulation systems are a difficult task because of
system complexities that include multi components, their interaction and variability over space and time. Developing a general
methodology and framework of uncertainty assessment for the systems' users has become very important. As the first part of
a large study addressing these issues, the focus of this paper is on spatial prediction and uncertainty assessment of topographic
factors involved in the Revised Universal Soil Loss Equation (RUSLE). The spatial variability of these topographic factors
including slope steepness factor S, slope length factor L, and their combined LS factor were modeled with semivariogram models.
Three geostatistical methods, including ordinary kriging, indicator kriging, and sequential indicator simulation, were applied
and compared. The predicted value maps of these factors, their error variance or conditional variance maps, and probability
maps for the predicted values larger than a given threshold value were derived. The comparison of the geostatistical methods
suggests that sequential indicator simulation better than ordinary and indicator kriging. |
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ISSN: | 0022-4561 1941-3300 |