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

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

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

Towards Determining Global River Discharge Using a Distribut...

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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

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