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| Content Provider | Springer Nature Link |
|---|---|
| Author | Matsuura, Sumio Okamoto, Takashi Asa, Shiho Matsuyama, Koji |
| Copyright Year | 2013 |
| Abstract | Meltwater and/or rainfall (MR) were monitored using lysimeters in a mountainous region in the north-central part of Japan, where a seasonal snowpack forms, to collect basic data sets for understanding the MR regime and sediment-related disasters. Statistical analyses of the data over 11 years showed that high hourly MR intensities were mainly observed as rain during the non-snow cover period, but the annual maximum daily MR often occurred during the snow cover period. The longer the time unit, the greater the shift in maximum MR values from the non-snow to snow cover periods. For a time unit of 70 h, almost all maximum values were recorded during snow melting periods. The timing, intensity and duration of MR regulate the characteristics of sediment-related disasters such as debris flows, slope failures and landslides. In the case of deep-seated landslides, if there are no accurate observations of MR during the snow cover period, the degree of risk may be underestimated. Furthermore, when designing groundwater discharge works to prevent deep-seated landslides, the timing, intensity and duration of MR must be accurately evaluated to effectively discharge groundwater during the snow melting period.Les quantités d’eau de fonte de neige et/ou de pluie ont été enregistrées à l’aide de lysimètres dans une région montagneuse de la partie centre-nord du Japon, où il se forme un manteau neigeux saisonnier. L’objectif était de recueillir des données de base pour comprendre le régime nivo-pluvial et les catastrophes en rapport avec l’apport de sédiments. Les analyses statistiques de ces données sur plus de onze ans ont montré que de fortes intensités horaires de pluie ont été principalement observées pendant la période sans manteau neigeux, mais l’intensité journalière maximum annuelle de fonte de neige et/ou de pluie a été observée souvent pendant la période avec manteau neigeux. Plus long était le temps de mesure, plus grand était l’écart entre les valeurs maximale de fonte de neige et/ou de pluie entre les périodes avec ou sans manteau neigeux. Pour une unité de temps de 70 heures, presque toutes les valeurs maximales ont été enregistrées durant des périodes de fonte de neige. Le moment, l’intensité et la durée de fonte de neige et/ou de pluie contrôlent les caractéristiques des catastrophes liées à l’apport de sédiments, telles que les coulées de débris, les ruptures de versants et les glissements de terrain. Dans le cas des glissements de terrain profonds, s’il n’y a pas d’observations précises de fonte de neige et/ou de pluie pendant la période d’enneigement, le niveau de risque peut être sous-estimé. En outre, lors de la conception de dispositifs de drainage des eaux souterraines pour prévenir les glissements de terrain profonds, le moment, l’intensité et la durée de fonte de neige et/ou de pluie doivent être évalués avec précision afin de drainer efficacement les eaux souterraines pendant la période de fonte de neige. |
| Starting Page | 119 |
| Ending Page | 129 |
| Page Count | 11 |
| File Format | |
| ISSN | 14359529 |
| Journal | Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur |
| Volume Number | 72 |
| Issue Number | 1 |
| e-ISSN | 14359537 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2013-01-18 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fonte de neige et/ou de pluie Régime nivo-pluvial Lysimètre Région enneigée Catastrophes liées à l’apport de sédiments Geotechnical Engineering & Applied Earth Sciences Geoengineering, Foundations, Hydraulics Geoecology/Natural Processes Nature Conservation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geology Geotechnical Engineering and Engineering Geology |
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