Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 42939
Title Point processes and random sets for analyzing patterns of methylene blue coloured soil.
Author(s) Stein, A.; Droogers, P.; Booltink, H.
Source Soil & Tillage Research 46 (1998). - ISSN 0167-1987 - p. 273 - 288.
Department(s) Laboratory of Soil Science and Geology
Publication type Refereed Article in a scientific journal
Publication year 1998
Keyword(s) porositeit - bodemdichtheid - poriënvolume - geostatistiek - porosity - soil density - pore volume - geostatistics
Categories Soil Physics
Abstract We consider the problem of quantitatively characterizing horizontal patterns of dye following infiltration. Such patterns display important information on the movement of possibly contaminated solutes from the soil surface to the ground water, which may cause risks for human health. The stains were made visible by means of methylene blue dye tracers. Different spatial statistical techniques are compared. First, a standard point pattern analysis is applied. Since the stains usually have a non-point type appearance, geostatistical techniques were used to account for positive areas. Next, more advanced point pattern techniques have been applied on replicate samples from different land management and land use types, focusing on the hazard rate for spatial patterns. As it turned out, point patterns analysis and geostatistics could be used in a complementary way, the point pattern analysis by considering colouring as basically generated by single points, the geostatistics by taking the spatial extension into account as well. The spatial hazard rate was useful to detect changes in the effects of land use.
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