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第20届国际地球物理大地测量大会(IUGG)于1991年8月11日至20日在维也纳举行。中国由叶笃正率90人代表团出席了会议、大会分别就大地测量(IAG);地震与地球物理(IASPEI);火山与地球内部(IAVCEI);地磁与天文(IAGA);气象与大气物理(IAMAP);水文(IAHS);海洋物理(IAPSO)等7个学科进行了专业研讨。其中水文科学(IAHS)又组织了6个专题学术报告会(Symposium)即:大河流域水文与水资源管理;河流泥沙与水质:大气、土壤、植被与水文的相互作用:高山林区雪与水文:湖泊与水库水文;土壤与地下水管理。笔者主要参加高
The 20th International Geophysical Geodesy Conference (IUGG) was held in Vienna from August 11 to 20, 1991. China was attended by a delegation of 90 people led by Ye Tusi. The conference focused on IAG, IASPEI, IAVCEI, IAGA, IAMAP, ); Hydrology (IAHS); Marine Physics (IAPSO) and other seven disciplines conducted a professional discussion. The Hydrological Sciences (IAHS) organized six Symposiums: Hydrology and Water Management in the Great River Basin; Sediment and Water Quality in the Rivers: Atmosphere, Soil, Interaction between Vegetation and Hydrology: Snow and Hydrology: Lake and Reservoir Hydrology; Soil and Groundwater Management. The author mainly to participate in high