Time change of water cycle in Huaihe River Basin

淮河流域水循环时间变化

基本信息

批准号：
07041099
负责人：
KATO Kuranoshin
金额：
$ 4.03万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1995
资助国家：
日本
起止时间：
1995 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07041099/
关键词：
Asian monsoon energy and water cycle processes meso-scale cloud and precipitation system Huaihe River Basin in China GAME HUBEX Japan-China scientific collaboration subtropical front

项目摘要

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 … More 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

Huaihe河流盆地位于所谓的Meiyu（Baiu）前部的重要亚热带阵线，在初夏停滞不前。洪水和干旱经常发生。 Hubex（Huaihe River盆地实验）是游戏的子项目之一（GEWEX亚洲季风实验），将从1996财政年度开始进行，以澄清盆地周围的水周期及其在1995 Fibiscal Asistion and Inchorgions and Inchorgions and Incorigand of the Ingory and Aserory Insisist insory Insists Insists Insists Insords Insorists inter Ondering of the Procortability的变化，并阐明了其机械的范围。 a pilot study of HUBEX.In the HUBEX, we will make intensive field observations in 1998, such as intensive rainsonde 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 … More cloud systems, special field observations on interaction土地表面和大气之间的过程包括水文，以及耦合中级气氛和土地表面模型的构建。目前的研究检查了上述提到的项目，并使用迄今为止可用的数据，包括1991年夏季对案件进行的飞行员分析，当时大洪水在Huaihe River Basin中发生的数据和信息的调查还与日本科学有关。这些结果和未来的问题在1996年3月在名古屋的Hubex研讨会上进行了总结。主要发现如下。1）在1991年的洪水时期，不仅从南方进入盆地的大量水分流入持续存在，而且还有有效的宏观融合（从北部边界流出很小）。即使在那个时期，局部蒸发对面部降水的贡献也不小。 1988年7月，通过检索这些数据来阐明中β尺度系统的维护过程。对这种情况进行了不同积云参数化的敏感性测试。SIBUC（包括Urban Canopy在内的简单生物圈模型）通过申请BIWA Lake Basin收缩并检查。还试图改进分布式的液压模型，该模型还可以改善。5）使用常规的表面气象数据，用于评估土地上的表面热量和水分通量。较少的