Basin Environment Analysis Using Multi-Dimensional High-Resolution Information Simultaneously Obtained by Aircraft, Satellite and Ground-Based Observations

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1) Estimation of sensible heat flux in a basin in the University Forest in Aichi : Shibano investigated the regression relationship between the thermal band data of airborne MSS and surface temperature in bareland, forest and water areas, He also discussed basin-scale estimation of sensible heat flux, obtaining diurnal change in surface temperature based on analysis of the relationship between surface surface temperature and elevation/orientation.2) Use of aircraft and satellite remote sensing (RS) images of various spatial resolutions : Takara compared the classification accuracy of four RS images of different spatial resolutions acquired by the airborne MSS, SPOT-HRV, JERS-OPS, Landsat-TM.The effect of spatial resolution on classification accuracy was examined by using images obtained by a degradation algorithm, Takara and Shibano investigated the difference of forest units selected as areas of different characteristics, in terms of the shape of R-IR plots and the values of various v … More egetation indeces.3) Modeling of water and heat cycle using RS data and ground-based observations : Kondoh applied thermal infrared data to a model describing water and energy flow in basins. He found the the correspondence between the three-dimensional structure of urban areas and the distribution of surface and air temperatures. Proposing a method of estimating the evaporation ratio based on the vegetation index obtained by satellite images, he used an existing global dataset and mapped continental-scale evaporation distribution.4) Runoff analysis model based on a digital elevetion model (DEM) : Uding 20-m DEM for the University Forest, Tachikawa introduced triangular iregular network (TIN) for precise description of river basins, He reproduced rainfall-runoff in the Shirasaka sub-basin by coupling the runoff model with the water flow routing method on hillslopes and in channel networks.5) Summarizing these results, Nishio published the final report of this co-operative research in book form and distributed it to related investigators in Japan. Less