- Tytuł:
- Natural versus anthropic causes in variations of sand export from river basins: an example from the Guadiana River Mouth (Southwestern Iberia)
- Autorzy:
-
Dias, J. M. A.
Gonzales, R.
Ferreira, Ó. - Powiązania:
- https://bibliotekanauki.pl/articles/1187374.pdf
- Data publikacji:
- 2004
- Wydawca:
- Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
- Tematy:
-
Guadiana River
sediment transport
estuarine sand bodies
floods
NAO
anthropic influence - Opis:
- Flood events in many river basins with highly variable discharge values remove accumulated sediments from the riverbed and estuaries. These sediments are exported to the shelf and the adjacent coastlines. Data for rainfall and river discharge for the Guadiana River basin in southwestern Iberia show a strong link with North Atlantic Oscillation (NAO) index patterns. A negative NAO index usually results in more rainfall, and subsequent flooding in the river basin during winter months. During the second half of the 20th century, the flow regime of the Guadiana River and its tributaries have been increasingly constrained by the construction of dams. The consequences were a reduction of coarse-grained sediment export from the upper river basin to the estuary, and a reduction in the number and type of floods.
- Źródło:
-
Polish Geological Institute Special Papers; 2004, 11; 95-102
1507-9791 - Pojawia się w:
- Polish Geological Institute Special Papers
- Dostawca treści:
- Biblioteka Nauki
Artykuł