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River management system development in Asia based on Data Integration and Analysis System(DIAS) under GEOSS

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Science China Earth Sciences 2015年第1期58卷 76-95页

作者： toshio koike Petra KOUDELOVA Patricia Ann JARANILLA-SANCHEZ Asif Mumtaz BHATTI Cho Thanda NYUNT Katsunori TAMAGAWA Department of Civil Engineering River and Environmental Engineering Laboratorythe University of Tokyo Department of Civil and Environmental Engineering Hydraulic Engineering LaboratoryHiroshima University

This paper introduces the process of development and practical use implementation of an advanced river management system for supporting integrated water resources management practices in Asian river basins under the framework of GEOSS Asia water cycle initiative （AWCI）. The system is based on integration of data from earth observation satellites and in-situ networks with other types of data, including numerical weather prediction model outputs, climate model outputs, geographical infor- mation, and socio-economic data. The system builds on the water and energy budget distributed hydrological model （WEB-DHM） that was adapted for specific conditions of studied basins, in particular snow and glacier phenomena and equipped with other functions such as dam operation optimization scheme and a set of tools for climate change impact assess- ment to be able to generate relevant information for policy and decision makers. In situ data were archived for 18 selected ba- sins at the Data Integration and Analysis System （DIAS） of Japan and demonstration projects were carded out showing poten- tial of the new system. It included climate change impact assessment on hydrological regimes, which is presently a critical step for sound management decisions. Results of such three case studies in Pakistan, Philippines, and Vietnam are provided here.

关键词： integrated water resources management tools climate change impact assessment Asian river basins Asian Water Cycle Initiative

Implementing the GEOSS water strategy: from observations to decisions

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International Journal of Digital Earth 2023年第1期16卷 1439-1468页

作者： Richard Lawford Sushel Unninayar George J.Huffman Wolfgang Grabs Angélica Gutiérrez Chu Ishida-Watanabe toshio koike Morgan State University BaltimoreUSA NASA Goddard Space Flight Center GreenbeltUSA International Water Affairs Federal Institute of HydrologyKoblenz National Oceanic and Atmospheric Administration Silver SpringUSA Japan Aerospace Exploration Agency Tsukuba International Centre for Water Hazard and Risk Management Tsukuba

In 2014,The GEOSS Water Strategy–From Observations to Decisions was published and steps were taken to implement the Strategy’s *** Strategy highlighted priority areas where the application of Earth observations to water research and water management decisions would have significant scientific and societal *** article reviews the implementation of the Strategy’s recommendations over the past eight *** a review of the Strategy’s assessment of the needs for water observations and their applications,it then reviews actions taken in response to the Strategy’s recommendations in its four major themes:improved data acquisition for Essential Water Variables,research and product development,interoperability,and capacity *** highlights significant achievements in the implementation of the Strategy including some motivated by factors beyond this Strategy,reviews actions taken by participating agencies and programs for each of the main themes and summarizes the remaining challenges in achieving the Strategy’s full *** article not only is an update for the Water Community regarding the GEOSS Water Strategy,but it is also an example of how other communities could develop and promulgate a set of strategic recommendations,monitor progress,and carry out assessments of their effectiveness.

关键词： Earth observations water essential water variables research interoperability capacity development

Development of an integrated modeling system for improved multi-objective reservoir operation

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Frontiers of Structural and Civil Engineering 2010年第1期4卷 47-55页

作者： Lei WANG Cho Thanda NYUNT toshio koike Oliver SAAVEDRA Lan Chau NGUYEN Tran van SAP Department of Civil Engineering the University of TokyoJapan National Hydro-Meteorological Service Ministry of Natural Resources and EnvironmentVietnam

Reservoir is an efficient way for flood control and improving all sectors related to water resources in the integrated water resources ***,multiobjective reservoir plays a significant role in the development of a country’s economy especially in developing *** multi-objective reservoirs have conflicts and disputes in flood control and water use,which makes the operator a great challenge in the decision of reservoir *** improved multi-objective reservoir operation,an integrated modeling system has been developed by incorporating a global optimization system(SCE-UA)into a distributed biosphere hydrological model(WEB-DHM)coupled with the reservoir routing *** new integrated modeling system has been tested in the Da River subbasin of the Red River and showed the capability of reproducing observed reservoir inflows and optimizing the multi-objective reservoir ***,the WEB-DHM was calibrated for the inflows to the Hoa Binh Reservoir in the Da ***,the WEB-DHM coupled with the reservoir routing module was tested by simulating the reservoir water level,when using the observed dam outflows as the reservoir ***,the new integrated modeling system was evaluated by optimizing the operation rule of the Hoa Binh Reservoir from 1 June to 28 July 2006,which covered the annual largest flood *** using the optimal rule for the reservoir operation,the annual largest flood peak at downstream control point(Ben Ngoc station)was successfully reduced(by about 2.4 m for water level and 2500 m^(3)·s^(-1) for discharge);while after the simulation periods,the reservoir water level was increased by about 20 m that could supply future water use.

关键词： distributed biosphere hydrological model(WEB-DHM) optimization multi-objective reservoir the Red River basin

Estimation of Spatially Distributed Rainfall Rate in Naqu Basin Using Data of Ground-based Radar and Precipiation Gauge Network of Game-Tibet 1998

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Estimation of Spatially Distributed Rainfall Rate in Naqu Ba...

第四届青藏高原国际学术研讨会

作者： Petra Koudelova toshio koike Dept. of Civil Engineering University of Tokyc7-3-1 HongoBunkyo-ku Tokyo 113Japan Dept. of Civil Engineering University of Tokyc7-3-1 HongoBunkyo-ku Tokyo 113Japan

＜正＞The Global Energy and Water cycle Experiment （GEWEX） Asian Monsoon Experiment （GAME）-Tibet project aims clarify the land surface-atmosphere interacitions over the Tibetan Plateau in the coniext of the Asian monsoon system. A hydrological analysis is among the main issues of GAME-Tibet, for which the quantitative evaluation of spatially and temporally- distributed rainfall is of fundamental importance. A preeipitation gauge network（PGN） was installed during GAME-Tibet. The gauges provide hourly precipitation data but only at several points within the Naqu basin. In order to obtain precipitation distribution patterns and areal amounts, the radar reflectivity data can be used, that were provided by the X-band Doppler radar of the National Space Development Agency of Japan（NASDA）, now Japan aerospace Exploration Agency （JAXA）, during the GAME-Tibet in 1998.

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青藏高原中部降水稳定同位素变化与季风活动

地球化学 2001年第3期30卷 217-222页

作者：田立德姚檀栋孙维贞 Numagyti Atusi koike toshio 中国科学院寒区旱区环境与工程研究所冰芯与寒区环境实验室甘肃兰州730000 Graduate School of Environmental Earth Science Hokkaido University Department of Civil Engineering University of Tokyo

根据1998年夏季中日GAME/Tibet项目在青藏高原中部进行的降水中稳定同位素研究结果以及相关的气象观测资料,分析了青藏高原中部夏季降水中δ18O的变化规律。研究结果发现,青藏高原中部夏季降水中δ18O的波动与大规模天气活动有关,而不... 详细信息

根据1998年夏季中日GAME/Tibet项目在青藏高原中部进行的降水中稳定同位素研究结果以及相关的气象观测资料,分析了青藏高原中部夏季降水中δ18O的变化规律。研究结果发现,青藏高原中部夏季降水中δ18O的波动与大规模天气活动有关,而不是地方性的气象条件。该地区降水中δ18O对水汽来源的变化以及水汽的输送过程十分敏感。夏季伴随西南季风进入高原南部的水汽形成的降水中δ18O较低,而且季风活动越强,降水中δ18O也越低。从青藏高原北部而来的水汽或地方蒸发水汽形成的降水,其δ18O值较高。

关键词：降水季风活动青藏高原氧同位素水样天气活动

Towards Determining Global River Discharge Using a Distributed Hydrological Model and Global Mapping

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Towards Determining Global River Discharge Using a Distribut...

International Symposium of Iahs-Pub and the 2nd International Symposium of China-Pub

作者： VALERIANO Oliver Cristian Saavedra koike toshio RAHMAN Mafizur Dept.of Civil Eng. Univ.of TokyoBunkyo-kuTokyo 113-8656Japan. Dept.of Civil Eng. Bangladesh Univ.of Eng.and Technol.Dhaka-1000Bangladesh

＜正＞To improve global water resource assessment,quantification of the global river discharge while considering the effect of slopes is *** patterns need to be transformed into discharge by a distributed hydrological model（DHM）.The model is expected to represent the spatial variation in aspects of digital global mapping such land use,land cover,vegetation and ***,a digital elevation model（DEM） is crucial for tracking the flow direction and defining the river network in a *** this study,the performance of a 1 km resolution DHM is compared with that of a 90 m resolution DHM in simulating the discharge of the Meghna River in *** basin,which is poorly gauged,runs from the Assam and Tripura mountain regions of India to the metropolitan area of *** the Bangladeshi area of the basin,the slopes are very gentle and typical of flat plains,which make it difficult to represent the geomorphological characteristics with *** expected,the 1 km resolution model had more constraints in representing the actual river ***,using a national drainage map it was possible to improve the DEM hydrologically using geographic information system *** input rainfall was obtained from the Tropical Rainfall Measuring Mission（TRMM） 3B42 V6 products available almost globally at 0.25°spatial *** original TRMM data was improved using available rain gauges over Bangladesh. These correction factors were then also extended over *** simulated discharge was evaluated during a flood event at two stations:Zhakiganj at the intake of the upper Meghna River and Bhairab Bazar at the oudet of the models. In summary,the simulation of river discharge using the 1 km resolution model gave reasonable results even though the condition of the slope was ***,the procedure here shows the feasibility of developing global river discharge using global *** future development,after setting thresholds at different co

关键词： Asian water cycle initiative Bangladesh distributed hydrological model global mapping Meghna River river discharge TRRM ground validation

Data Integration toward Understanding of the Energy and Water Cycle in the Tibetan Plateau

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Data Integration toward Understanding of the Energy and Wate...

第四届青藏高原国际学术研讨会

作者： toshio koike Katsunori Tamagawa Teisu Ohta Kenji Taniguch School of Engineering The University of TokyoBunkyo-kuTokyo 113-8656Japan School of Engineering The University of TokyoBunkyo-kuTokyo 113-8656Japan School of Engineering The University of TokyoBunkyo-kuTokyo 113-8656Japan School of Engineering The University of TokyoBunkyo-kuTokyo 113-8656Japan

＜正＞The energy and water cycle in the Tibetan Plateau is one of the most important features of the climate in Asia. Due to the effects of the atmospheric heating processes controlled by the variations of water storage as soil moisture, snow, and ice, the Tibetan Plateau plays an important role in the water cycle variations in Asia. To enhance predictability based on improved understanding of hydrological processes and its sustained monitoring capability in the Tibetan Pla（?）eau is a key contribution to mitigation of water-related damages and sustainable human development in Asia.

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青藏高原陆面同化系统的发展、验证及应用

青藏高原陆面同化系统的发展、验证及应用

青藏高原资源·环境·生态建设学术研讨会暨中国青藏高原研究会2007学术年会

作者：阳坤 toshio koike 中国科学院青藏高原研究所 Department of Civil Engineering University of Tokyo

本研究分两部分。第一部分是根据国际协调增强观测器计划CEOP(Coordinated Enhanced Observation Project)集成的大量野外观测数据、卫星产品和模式输出对当前天气预报的GCM做了一些评估,

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Natural history of asymptomatic gallbladder stones in clinic without beds:A long-term prognosis over 10 years

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World Journal of Clinical Cases 2024年第1期12卷 42-50页

作者： Yuji Sakai toshio Tsuyuguchi Hiroshi Ohyama Junichiro Kumagai Takashi Kaiho Masayuki Ohtsuka Naoya Kato Tadao Sakai Department of Gastroenterology Sakai ClinicKimistu 299-1162Japan Department of Gastroenterology Graduate School of MedicineChiba UniversityChiba 260-8677Japan Department of Gastroenterology Chiba Prefectural Sawara HospitalChiba Prefectural Sawara HospitalSawara 287-0003Japan Department of Gastroenterology Kimitsu Central HospitalKisarazu 292-8535Japan Department of Surgery Kimitsu Central HospitalKisarazu 292-8535Japan Department of General Surgery Graduate School of MedicineChiba UniversityChiba 260-8677Japan

BACKGROUND Several studies have explored the long-term prognosis of patients with asymp-tomatic gallbladder *** reports were primarily conducted in facilities equipped with beds for addressing symptomatic *** To report the long-term prognosis of patients with asymptomatic gallbladder stones in clinics without bed *** We investigated the prognoses of 237 patients diagnosed with asymptomatic gallbladder stones in clinics without beds between March 2010 and October *** symptoms developed,patients were transferred to hospitals where appropriate treatment was *** investigated the asymptomatic and survival periods during the *** Among the 237 patients,214(90.3%)remained asymptomatic,with a mean asymptomatic period of 3898.9279±46.871 d(50-4111 d,10.7 years on average).Biliary complications developed in 23 patients(9.7%),with a mean survival period of 4010.0285±31.2788 d(53-4112 d,10.9 years on average).No patient died of biliary *** The long-term prognosis of asymptomatic gallbladder stones in clinics without beds was *** the condition became symptomatic,the patients were transferred to hospitals with beds that could address it;thus,no deaths related to biliary complications were *** finding suggests that follow-up care in clinics without beds is possible.

关键词： Gallbladder stone Acute cholangitis Acute cholecystitis Asymptomatic gallbladder stone Symptomatic gallbladder stone