去年夏天应日中农交之邀,赴日考察治山治水,由南到北考察了许多山地的水土保持工作进展。在此介绍北海道有珠山最近几年灾害的发生和采取的治山措施,通过这个点可窥见日本治山的一般面貌。有珠山位于东经140°50′北纬42°32′,洞爷湖、虻田町、壮瞥町、伊达市是该山的周围境界。有珠山是因地震引起、由地下上升到地表的粘性较大的石英安山岩构成。这个海拔高725米的火山是第四纪冲积世(1万年前)生成的。历史上,这个火山爆发喷火和洪水、泥石流灾害曾不断发生,但缺少确切的纪录。从火山堆积物的分布方面来分析,当今火山的再活动可能是三四百年前的继续。公元1663年、1769年、1822年、1853年均发生过喷火,1910年、1943—1945年曾发生地 Last summer, at the invitation of the Chinese People’s Political Consultative Conference on Agriculture and Rural Areas, went to Japan to study and treat the mountain water and inspect the progress of soil and water conservation in many mountainous areas from south to north. Here we introduce the occurrence of the disaster in Mt. Hokkaido that there was in recent years in Zhuhai, and the measures to take the mountain. Through this we can get a glimpse of the general appearance of Japan. There is Mount Pearl at 140 ° 50’E and 42 ° 32’N, with Lake Toya, Kotoda-cho, Sobetsu-cho, and Itami surrounded by the mountain. Pearl Hill is caused by the earthquake, rising from the ground to the surface of the viscous larger quartz andesite. This volcano, 725 meters above sea level, was formed by quaternary alluvial (10,000 years ago). Historically, the volcano erupts with spit fires and flooding. Debris flow disasters have occurred continuously, but the exact record is lacking. From the distribution of volcanic deposits to analyze, the reactivation of today’s volcano may be three or four hundred years ago to continue. Spitfire occurred in 1663, 1769, 1822, and 1853 AD, and occurred in 1910-1943-1945