Kiyoshi Torii

AUTOMATED SOIL MAP COMPILATION

Abstract A soil map is eonventionally prepared by an experieneed surveyor via the following three steps; (1) establishment of taxonomie class, (2) alloeation of sam pie into one of the classes, and (3) delineation of homogeneous areas in terms of mapping unit. These steps involve some degree of arbitrariness; thus soil maps prepared by two surveyors are never identical. The aim of this study is to define a eertain proeedure of soil map eompilation, by introdueing numerical handling of soil data, to obtain a reproducible and easy-to-prepare soil map, with the help of the funetions of the eomputer-based Soil Data Management System (COSMAS). The authors applied Hayashis theory of quantification No. 3 to numerical representation of soil profiles based on the pattern of eombination of various soil attributes relevant to soil classification. The following four soH types were recognized in the seattergram plotted using numerical va lues assigned to the soH profiles; Gley Lowland SoH, Gray Lowland Soil, Brown Lo...

Numerical Simulation on Unsteady Density Flows with Free Surfaces

In recent years, as the problems related to environmental conservation of water area and coastal development have become more serious and more complicated, it has become important to clarify the characteristics of the various kinds of density currents. A density current is the flow of one fluid within another caused by the density difference between the two fluids.

The ‘Tsukusys’ image processing system and its utilization in thematic Mapper investigations of water quality conditions

Abstract The ‘Tsukusys’ image processing system has been developed to analyze remote sensing data, particularly Landsat Multispectral Scanner (MSS) imagery. As Thematic Mapper (TM) data have only been available in Japan since 1985, that imagery was acquired to test the extension of ‘Tsukusys’ to improved spatial and spectral resolution data. The TM data were used to analyze water quality condition in and around the Kojima Bay, Japan where water pollution is an extremely important issue. The results of this endeavor indicate that the “Tsukusys”; image processing system can be utilized successfully for the analysis of TM data with some minor modifications to software processing.