| Co-Investigator(Kenkyū-buntansha) |
LIU Xinren Hohai Univ., Prof., 教授
黄 姜元 中国科学院, 大気物理研究所, 教授
王 相文 安徽省気象局, 副局長
葛 文忠 南京大学, 大気科学系, 教授
陽 民欽 水利部, 淮河水利委員会・教授級, 高級工程師
劉 春蓁 水利部, 水文水利信息中心・教授級, 高級工程師
趙 柏林 北京大学, 地球物理系, 教授
丁 一氾 中国気象局, 国家気候中心・所長, 教授
MATSUMOTO Jun Graduate School of Science, Univ.of Tokyo, Assoc.Prof., 大学院・理学系研究科, 助教授 (80165894)
TAKAHASI Hideo Fac.Integrated Arts & Sci., Hiroshima Univ., Res.Associate, 総合科学部, 助手 (40202155)
NAKAKITA Eiichi Disaster Prevension Research Inst., Kyoto Univ., Assoc.Prof., 防災研究所, 助教授 (70183506)
SHIIBA Michiharu Disaster Prevension Research Inst., Kyoto Univ., Prof., 防災研究所, 教授 (90026352)
IKEBUCHI Shuichi Disaster Prevension Research Inst., Kyoto Univ., Prof., 防災研究所, 教授 (20026181)
UYEDA Hiroshi Graduate School of Science, Hokkaido Univ., Assoc.Prof., 大学院・理学研究科, 助教授 (80184935)
KIKUCHI Katsuhiro Graduate School of Science, Hokkaido Univ., Prof., 大学院・理学研究科, 教授 (80000793)
TAMAGAWA Ichiroh Inst.Hydro.-Atmospheric Sci., Nagoya Univ., Res.associate, 大気水圏科学研究所, 助手 (40273198)
TSUBOKI Kazuhiza Ocean Res.Inst.Univ.of Tokyo, Assist.Prof., 海洋研究所, 助手 (90222140)
TAKEDA Takao Inst.Hydro.-Atmospheric Sci., Nagoya Univ., Prof., 大気水圏科学研究所, 教授 (60022604)
GE Wenzhong Dept.Atmos.Sci., Nanjing Univ., Prof.
HUANG Meiyuan Inst.Atmos.Phys., Chinese Academy of Sci., Prof.
DING Yihui National Climate Center, China Meteor.Admin., Senior Engineer
YANG Mingqin Huaihe River Com., Ministry of Water Resources in China, Senior Engineer
LIU Chunzhen Information Center, Ministry of Water Resources in China Senior Engineer
WANG Xiangwen Meteor.Bureau of Anhui Province, China, Prof.
ZHAO Bolin Dept.Geophys., Peking Univ., Prof.
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| Research Abstract |
Huaihe River Basin is located where the significant subtropical front, so-called the Meiyu (Baiu) front, stagnates in early summer. Floods and drought occur very often there. HUBEX (Huaihe River Basin Experiment) is one of the sub-project of GAME (GEWEX Asian Monsoon Experiment) and will be carried out from 1996 fiscal year to clarify the water cycle around the basin and its variation toward the establishment of predictability of the floods and the drought there. The present research project was carried out in 1995 fiscal year to clarify and their mechanisms by collaborating between the meteorologists and the hydrologists in Japan and China, as a pilot study of HUBEX.
In the HUBEX,we will make intensive field observations in 1998, such as intensive rawinsonde observation for input the regional 4-dimensional data assimilation, three Doppler Radars observation by the Japanese side for producing the Radar-Raingauge Composite Data and for retrieval of thermodynamic fields of meso-beta-scale
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cloud systems, special field observations on interaction processes between land-surface and atmosphere including hydrology, and construction of the coupled meso-scale atmosphere and land-surface model.
The present study examined the above mentioned items with use of the data available so far, including the pilot analysis of the case in summer of 1991 when the big flood occurred in the Huaihe River Basin The survey of data and informations was also made with visit of the basin by the Japanese scientists. These results and the future problems were summarized at the HUBEX workshop in Nagoya in March 1996. Main finding are as follows.
1) In the flood period in 1991, not only large moisture inflow from the south into the basin persisted, but also effective macro-scale convergence (outflow from the northern boundary was very small) was also remarked. Contribution of local evapotranspiration to the areal precipitation was not so small even in that period.
2) Cumulonimbus clusters with remarkable diurnal variation (maximum in the evening) was observed in the several regions adjacent to the Baiu frontal zone in summer of 1979. The role of the surface heating suggested to be rather different among these regions.
3) With use of the Doppler Radar observation data together with the conventional ones around the Japan Islands in July 1988, maintenance process of a meso-beta-scale system was clarified by the retrieval of these data. Sensitivity test of the different cumulus parameterization was made for that case.
SiBUC (Simple Biosphere Model including Urban Canopy) was contracted and checked by applying for the Biwa Lake basin. The distributed hydrological model, which can predict the river discharge, was also tried to be improved.
5) Scheme for evaluating the surface heat and moisture fluxes over land with use of conventional surface meteorological data was contracted. Less
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