Evaporation measurement to map the groundwater discharge on a tunnel wall of the low permeable rock mass. Part2. Field measurement.

Abstract

The distribution of evaporation rate on some rock walls of drifts in two mines, i.e., the Stripa Mine, Sweden and the Tono Mine, Japan.Although the relative humidity in the drifts of the Stripa Mine was lower than 85%, the humidity in the drifts of the Tono Mine was higher than 95%. The obtained results were as follows;(1) The evaporation rate could be well measured even under the high humidity condition.(2) Considerable amount of water could evaporate from a dried fracture.(3) Evaporation rate spatially changed along a fracture.(4) The evaporation rate might be identical to the groundwater discharge comming through a rock mass if the permeability of rock mass was low. It was clearly found that the technique of the evaporation measurement was quite useful for mapping the groundwater discharge on a tunnel wall of the low permeable rock mass.

Drying-induced deformation behaviour of Shirahama sandstone in no loading regime

“…From these measured entities, evaporation rate is calculated by the gradient method. The installation procedure, measurement technique and calculation method are explained and detailed in Watanabe (1989) and Watanabe et al (1995). Throughout the test, data were recorded by data loggers and programmed to send and store in a computer.…”

Evaporation Measurement for the Preservation of Historical Buddhist Monastery Ajina Tepa, Tajikistan

“…Since the vapor saturation (Sr) is a function of temperature (T) and it can be expressed as follows 1) ;…”