EVALUATION OF THE EFFECT OF FOREST DESTRUCTION ON WATER CYCLE

首席调查员筑本吉则与澳大利亚詹姆斯·库克大学高级讲师迈克·博内尔博士进行了联合研究。他们调查了澳大利亚昆士兰州热带森林巴宾达流域的水文研究数据。调查了径流和土壤导水率的变化，并与其他热带分水岭进行了比较；竹下敬司调查了森林破坏与径流周期变化和土壤侵蚀的关系，举例说明了希腊、新西兰和印度尼西亚的比较研究；Konohira Yuukichi调查了森林利用和保护的兼容性。他提出了森林采伐规划的马赛克模型，考虑了森林生态系统多样性的保护和生产的可持续性。小川茂研究了森林火灾对森林生态系统的破坏。研究了森林火灾对动植物生态系统、土壤、暴雨径流和大气的影响。福岛义弘论述了明治时代后日本森林破坏和裸露土地扩张与进步的社会背景。他用他的模拟模型证明了与森林覆盖的斜坡相比，基坡上的暴雨径流增加了。岩尾五郎研究了森林覆盖的流域中矿物和有机物质的收支。他研究了森林土壤对污水的垂直迁移和变化以及森林土壤对污染水的净化和捕集功能。小仓纪夫论述了全球范围内的环境破坏，阐述了海水污染、森林砍伐对溪水水质的影响以及酸雨和气候变暖对森林破坏的影响。

The head investigator, Tsukamoto Yoshinori, carried out corporative research with Dr. Mike Bonell, Senior Instructor of James Cook University in Australia. They investigated hydrologic research data of Babinda watersheds in tropical forest in Queensland, Australia. The change of runoff and the hydraulic conductivity of soil were investigated and compared with other tropical watersheds.Takeshita Keiji investigated the relationship between forest destruction and the change of runoff cycle and soil erosion, illustrating comparative study in Greece, Newzealand and Indonesia.Konohira Yuukichi investigated the compatibility of utilization and conservation of forest. He presented a mosaic model of forest planning for logging, considering the conservation of variety of forest ecosystem and sustainability of production.Ogawa Shigeru investigated the destruction of forest ecosystem by forest fire. The effect of forest fire on animal and plant ecosystem, on soil, on storm runoff and on atomosphere was investigated.Fukushima Yoshihiro discussed the social background of forest destruction and expansion and progress of bareland in Japan after Meiji era. He demonstrated the increase of storm runoff on a bareslope compared to that of a forested slope by using his simulation model.Iwatsubo Gorro investigated the budget of mineral and organic substances in a forested watershed. He investigated the vertical moverment and change of dissolved substances and purification and trapping function of forest soil for polluted water.Ogura Norio discussed the environmental destruction of global scale, illustrating sea water pollution, the effect of forest logging on streamwater quality and the effect of acid rain and climatic warming on forest destruction.