β Scribed by W.R. Van Wijk; W.J. Derksen
No coin nor oath required. For personal study only.
The thermal properties, heat conductivity ). and volumetric heat capactty C or thermal diffusivity a --)./C, have been determined for soils in the field using a newly developed method. In this method a heat-flux meter is placed on the surface and a "heat pulse" is given by irradiating the heat-flux plate by an incandescant lamp for a short period 5 31 rain.
Instead of irradiating, shading of the soil can be applied on bright days. The use of Laplace transforms for temperature records permits calculation of the thermal properties in cases of a non-periodic, arbitrary temperature variation. The method has been developed particularly for application to the soil close to the surface, but it can be used for the determination of )./C in deeper layers also. Examples for a clay, sandy and peat soil are given.
π SIMILAR VOLUMES
## Abstract We developed a nearβsurface moisture index (NSMI) that models relative moisture using visible and thermal spectra. The NSMI tracks the evolution of spring snowmelt and has potential MODIS applications. An analytical radiative transfer model for computing directional hemispherical reflec
## Abstract The portable surface capacitance insertion probe was used to measure the __in situ__ water content of near surface soil layers. The probe readings were calibrated against gravimetric samples collected over a wide range of water contents, and were found to be very closely correlated. The