Document Type

Conference Proceeding


2006 ASABE Annual International Meeting

Publication Date



Portland, OR


Soil moisture is an important component of numerous systems, influencing crop development, and runoff and infiltration partitioning, among other things. However, due to its spatial and temporal variability, it is difficult to estimate soil moisture consistently using conventional techniques such as gravimetric sampling, which is point-based and time-consuming. Therefore, to overcome this drawback in soil moisture estimation and mapping, and to facilitate its measurement spatially and temporarily, remote sensing is a promising technique. Measurement of soil surface reflectance in the visible and near infrared (VIS/NIR) may be used for this purpose. However, soil reflectance within this spectral range is affected by numerous factors, including soil surface roughness and the presence of soil crust. Thus, in order to determine the utility of VIS/NIR remote sensing for surface soil moisture estimation, roughness and crusting must be considered. In this study, we quantify the effects of these three components (moisture, roughness, and degree of crusting) on soil surface reflectance within the spectral range of 450 nm to 1000 nm in order to determine the extent to which moisture can be estimated under different soil surface conditions.

Copyright Owner

American Society of Agricultural and Biological Engineers




Article Location