杨逸畴先生是我国著名的地貌学家,他将毕生的精力贡献给了祖国的地理科学事业。1959-1998年他前后20余次到青藏高原考察,其中二次在喜玛拉雅山库拉岗日峰和南迦巴瓦峰参加登山科考,八次进入雅鲁藏布大峡谷考察。他五次深入新疆塔克拉玛干大沙漠腹地考察。2001年后,他还开展了对台湾澎湖、兰屿、绿岛的历史环境考察。他曾四次到日本考察并开展学术交流,2003参加了北极考察。他在多年实地考察基础上,以丰富的资料和测量数据,参与论 Mr. Yang Yichu is a famous geomorphologist in our country who dedicated all his life energy to the geography science of the motherland. From 1959 to 1998, he visited the Qinghai-Tibet Plateau more than 20 times before and after. Among them, he participated in the mountaineering expedition twice in the Himalayas and the Namjagbarwa, and went into the Brahmaputra Grand Canyon for eight times. He visited the Hinterland of Taklamakan Desert in Xinjiang five times. After 2001, he also conducted an investigation of the historical environment of Penghu, Orchid Island and Green Island in Taiwan. He visited Japan four times and conducted academic exchanges. In 2003, he participated in the Arctic expedition. Based on his many years of field trips, he participated in the theory with a wealth of data and measurements