Reflectance anisotropy for measuring soil surface roughness of multiple soil types

Auteur(s) et Affiliation(s)

CROFT, H.

Dep. of Environmental Sciences, Univ., Basel, Suisse

ANDERSON, K.

College of Life and Environmental Sciences, Univ., Exeter, Royaume-Uni

KUHN, N.J.

Dep. of Environmental Sciences, Univ., Basel, Suisse

Description :
Five soil types with varying biochemical properties were subjected to artificial rainfall, producing a sequence of soil states of progressively declining soil surface roughness. Point laser data (2 mm sample spacing) were geostatistically analysed to give a spatially-distributed measure of surface roughness. Hyperspectral Hemispherical Conical Reflectance Factors (HCRFs) from the soil states were measured using a ground-based hyperspectral spectroradiometer. A directional index (Anisotropy Measure; AM) was determined, using a ratio between extreme forward-scattered and backscattered HCRFs. Regression analysis of AM against a geostatistically-derived value of soil surface roughness (sill variance) was used to test the ability of the AM for description of surface roughness for all soil types. The results demonstrate the great potential of this approach for compensating for spectral differences between different soil types.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 93, p. 87-96, nombre de pages : 10, Références bibliographiques : 47 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais