کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9490422 1629575 2005 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geostatistical modelling of spatial processes on directed trees: Application to fluvisol extent
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Geostatistical modelling of spatial processes on directed trees: Application to fluvisol extent
چکیده انگلیسی
This paper shows that geostatistical modelling can be extended to spatial supports such as directed trees and applied to variables spatially structured along a river network. Specific assumptions were necessary and main methods were redefined introducing modifications on metrics, proper variogram estimates and ad hoc drift models. We also proposed a model-based simulation procedure to generate random functions on directed trees. A case study on fluvisol delineation for the Hérault river (South of France) was analyzed. Clear spatial structures were observed and modelled using variogram based on upstream-downstream distance along a hydrographic network. A drift was also modelled as a multiplicative term affecting the fluvisol width versus the cumulated length of the upstream network. The significance of the drift was then assessed conditionally to the former spatial variogram using Monte-Carlo simulations of the spatial observed process on the river network.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 128, Issues 3–4, October 2005, Pages 179-191
نویسندگان
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