Jordan, Christian; Tiede, Jan; Lojek, Oliver; Visscher, Jan; Apel, Heiko et al.: Sand mining in the Mekong Delta revisited - current scales of local sediment deficits. In: Scientific Reports 9 (2019), Nr. 1, 17823. DOI: https://doi.org/10.1038/s41598-019-53804-z
Zusammenfassung: | |
The delta of the Mekong River in Vietnam has been heavily impacted by anthropogenic stresses in recent years, such as upstream dam construction and sand mining within the main and distributary channels, leading to riverbank and coastal erosion. Intensive bathymetric surveys, conducted within the Tien River branch during the dry and wet season 2018, reveal a high magnitude of sand mining activities. For the year 2018, an analysis of bathymetric maps and the local refilling processes leads to an estimated sand extraction volume of 4.64 ± 0.31 Mm3/yr in the study area, which covered around 20 km. Reported statistics of sand mining for all of the Mekong’s channels within the delta, which have a cumulative length of several hundred kilometres, are 17.77 Mm3/yr for this period. Results from this study highlight that these statistics are likely too conservative. It is also shown that natural sediment supplies from upper reaches of the Mekong are insufficient to compensate for the loss of extracted bed aggregates, illustrating the non-sustainable nature of the local sand mining practices. | |
Lizenzbestimmungen: | CC BY 4.0 Unported |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2019 |
Die Publikation erscheint in Sammlung(en): | Fakultät für Bauingenieurwesen und Geodäsie |
Pos. | Land | Downloads | ||
---|---|---|---|---|
Anzahl | Proz. | |||
1 | United States | 141 | 37,11% | |
2 | Germany | 89 | 23,42% | |
3 | United Kingdom | 16 | 4,21% | |
4 | No geo information available | 14 | 3,68% | |
5 | Vietnam | 10 | 2,63% | |
6 | Latvia | 9 | 2,37% | |
7 | China | 9 | 2,37% | |
8 | India | 8 | 2,11% | |
9 | France | 8 | 2,11% | |
10 | Netherlands | 7 | 1,84% | |
andere | 69 | 18,16% |
Hinweis
Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.