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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Fukuda, Yoichi Yamamoto, Keiko Nishijima, Jun Hasegawa, Takashi Nakaegawa, Toshiyuki Taniguchi, Makoto |
| Spatial Coverage | Japan |
| Description | Country affiliation: Japan Author Affiliation: Fukuda Y ( Department of Geophysics, Graduate School of Science, Kyoto University, Kitashirakawaoiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan. fukuda@kugi.kyoto-u.ac.jp) |
| Abstract | In order to establish a new technique for monitoring groundwater variations in urban areas, the applicability of precise in-situ gravity measurements and extremely high precision satellite gravity data via GRACE (Gravity Recovery and Climate Experiment) was tested. Using the GRACE data, regional scale water mass variations in four major river basins of the Indochina Peninsula were estimated. The estimated variations were compared with Soil-Vegetation-Atmosphere Transfer Scheme (SVATS) models with a river flow model of 1) globally uniform river velocity, 2) river velocity tuned by each river basin, 3) globally uniform river velocity considering groundwater storage, and 4) river velocity tuned by each river basin considering groundwater storage. Model 3) attained the best fit to the GRACE data, and the model 4) yielded almost the same values. This implies that the groundwater plays an important role in estimating the variation of total terrestrial storage. It also indicates that tuning river velocity, which is based on the in-situ measurements, needs further investigations in combination with the GRACE data. The relationships among GRACE data, SVATS models, and in-situ measurements were also discussed briefly. |
| ISSN | 00489697 |
| Issue Number | 9 |
| Volume Number | 407 |
| e-ISSN | 18791026 |
| Journal | Science of The Total Environment |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2009-04-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Environmental Monitoring Methods Gravitation Spacecraft Instrumentation Water Pollution, Chemical Analysis Japan Models, Theoretical Rivers Water Supply Comparative Study Journal Article Discipline Environmental Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
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