Development of Global Basins Development of Global Basins Database (GBDB) (GBDB) Database AIM Workshop kshop AIM Wor th - st ,2006 February 19 th February 19 -21 21 st ,2006 National Institute for Environmental Studies National Institute for Environmental Studies Yuji Masutomi and and Yuzuru Yuzuru Matsuoka Matsuoka Yuji Masutomi Kyoto University Kyoto University
Table of Contents Table of Contents Motivation and Objectives Motivation and Objectives 1. 1. Methodology Methodology 2. 2. GBDB GBDB 3. 3. Validation Validation 4. 4. Summary and Future plan Summary and Future plan 5. 5.
Ⅰ Motivation and Objectives Ⅰ Motivation and Objectives - Development of Global Basins Database Development of Global Basins Database- - - � Global basins data Global basins database can be used in a base can be used in a � broad range of global studies broad range of global studies � Global basins database gives Global basins database gives � � information of hydrological flow information of hydrological flow � • for for modeling modeling • � in hydrology, biogeochemistry, ecosystem, in hydrology, biogeochemistry, ecosystem,… … � � appropriate spatial unit appropriate spatial unit � • for hydrological • for hydrological assessment and management assessment and management
Ⅱ and Objectives Ⅱ Motivation and Objectives Motivation - Early studies Early studies- - - � HYDRO1k: Global hydrological datasets HYDRO1k: Global hydrological datasets � � feature feature � • comprehensive hydrological datasets • comprehensive hydrological datasets � basin boundary, stream line, flow direction, basin boundary, stream line, flow direction,… … � • first dataset which are derived from a global 1km first dataset which are derived from a global 1km- -DEM DEM • � defect defect � • low reliability because of no validation with existing data low reliability because of no validation with existing data • • includes only topographical information includes only topographical information • The goal is development of Global Basins Database which is 1. validated and reliable and includes 2. not only topographical information but also hydrological, climatic, social,…
Ⅰ - Methodology Ⅰ - Outline Outline - - Methodology DEM Basin Delineation Adding attributes Basin Area Basin Delineation Accumulated Area Country Population Basin Boundary Data Land Use/Cover Adding attributes Basin Boundary DEM GBDB
Ⅱ - Methodology Ⅱ - Basin Delineation Basin Delineation – – Methodology � Raw DEM has many errors to derive incorrect basin Raw DEM has many errors to derive incorrect basin � boundaries. boundaries. � We used DEM enhanced by Stream Burning method We used DEM enhanced by Stream Burning method � � Stream Burning Stream Burning: decreasing the value of DEM along river data : decreasing the value of DEM along river data � The generated basin is consistent with river data which is used in stream burning method!! � River data which are the most reliable for each region are River data which are the most reliable for each region are � used in Stream Burning method used in Stream Burning method Stream Burning River Data Region Source KS-272 Japan Ministry of Land Infrastructure and Transport(1978) River-Korea Korea Peninsula Korea Environmet Institute Canadskel_l Canada National Resources Canada(2003) VMAP0 the other regions Defence Mapping Agency(1993)
Ⅲ - Methodology Ⅲ - Basin Delineation Basin Delineation - - Methodology Countr/Basin Map � � In stream burning procedure, In stream burning procedure, Asia Asia Hydrogeologic Map some errors are often created. some errors are often created. Japan KS-273 River data error River data error � � KS-272 DEM resolution DEM resolution Korea Basin-Korea � � Korea Penninsula River-Korean Peninsula … … � � China China National Map In order to find those errors, we � � In order to find those errors, we Chinease Hydrological Dictionary had two comparison with had two comparison with Taiwan National Atlas of China Vol.1 collected basin maps collected basin maps � � Vietnam Atlas du Viet-Nam upstream area of river discharge upstream area of river discharge Vietnam Hydrometeorological Atlas � � gauging stations gauging stations Hydrological Network � The generated basin map is The generated basin map is Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V � Mekong B-CATLMB50 compared with collected basin compared with collected basin B-RIV50 maps maps India River Basin Atlas of India � Calculated upstream area were � Calculated upstream area were Thailand Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V compared with reported ones at compared with reported ones at Thailand--Hydrogeologic Map the discharge gauging station the discharge gauging station Indonesia Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V provided by Global Runoff Data provided by Global Runoff Data Malaysia Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V Center (GRDC) Center (GRDC) Papua New Guinea Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V Philippines Catalogue of Rivers For Southeast Asia and The Pacific-Volume I-V � � If an error was found, DEM If an error was found, DEM Laos Lao geographic Atlas would be modified and Basin would be modified and Basin Pakistan Geohydrology of the Indus River, data would be regenerated from data would be regenerated from Water Resource development projects and Indus basin irridation system the modified DEM. the modified DEM. The new Oxford atlas for Pakistan � The procedure of comparing and � The procedure of comparing and Russia Soviet Union--River Systems Map regenerating basin data is regenerating basin data is Mongolia National Atlas of Monglian People's Republic iterated until there is no error. iterated until there is no error. Nepal Climatic and Hydrological atlas of Nepal Bangladesh Bangladesh--Rivers of Bangladesh Sri Lanka Sri Lanka Arjuna's Atlas
GDBD - - Basin Map and Attributes Basin Map and Attributes - - GDBD ID ｓ and Nextdown Nextdown Basin ID Basin ID Geographic Topographic Country Population/ Population Density Land Use/Cover ● Each polygon has geographic, topographic, social information ● Each polygon has geographic, topographic, social information ● The attributes of each polygon can be browsed by clicking a poly ● The attributes of each polygon can be browsed by clicking a polygon on GIS gon on GIS
GBDB - - general information and status of general information and status of GBDB development - - development � general information general information � � Format Format : : ArcGIS ArcGIS Geodatabase Geodatabase Format Format � = ArcGIS ArcGIS + Microsoft Access + Microsoft Access = • We can use query, VBA, and so on We can use query, VBA, and so on… … • � Region Regions s : 6 regions : 6 regions � • Africa, Asia Africa, Asia- -Pacific, Europe+ Central East, North and Central Pacific, Europe+ Central East, North and Central • America, Oceania, South America America, Oceania, South America � Status of development Status of development � � For Asia and Pacific region, basins database has For Asia and Pacific region, basins database has � been completed been completed � For the other regions, basin delineation has been For the other regions, basin delineation has been � finished once and now we are checking the generated finished once and now we are checking the generated basin data basin data
Ⅰ - Validation Ⅰ - upstream area of discharge upstream area of discharge Validation gauging station of GRDC - - gauging station of GRDC Comparison the calculated � Comparison the calculated � upstream area in the basin data of upstream area in the basin data of GBDB with the reported ones by GBDB with the reported ones by GRDC GRDC � selected 1231 gauging stations selected 1231 gauging stations � from 1383 ones in Asia from 1383 ones in Asia The omitted stations have clearly The omitted stations have clearly � � wrong value of upstream area or wrong value of upstream area or location. location. Distribution of discharge gauging stations 10000000 10000000 Calculated upstream area by basin data of Calculated upstream area by basin data of y = 1.0082x + 666.65 y = 1.0176x + 1535.5 2 = 0.9944 2 = 0.9606 R R 1000000 1000000 HYDRO1k [km 2 ] GBDB [km 2 ] 100000 100000 10000 10000 1000 1000 GBDB HYDRO1k 100 100 100 1000 10000 100000 1000000 10000000 100 1000 10000 100000 1000000 10000000 Reported upstream area by GRDC [km 2 ] Reported upstream area by GRDC [km 2 ]
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