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Downhill courses as significant landscape structure of the High Tatras Mts., Slovakia

Jančura P., Slámová M., Hrčková L., Beláček B.

Landform Analysis

2009

Vol. 11

33-39

Present state and changes of landscape's structures in high-mountain’s environment requires rigorous scientific research. There the most intensive dynamic changes have started after wind throw disaster on the 19th November 2004 and intensification of new investment construction. Massive modifications of downhill courses of Solisko (above Štrbske pleso Lake) and in Tatranska Lomnica (under Skalnaté pleso Lake) have begun since 2008. The main task is anthropic influence's evaluation of downhill courses according to data's interpretation of relationship between exposed substrate and vegetation cover. Results introduced in article represent the state until the year of 2008 and consequently they will have historical value, concerning visible changes in studied areas. We comment scientific background of invested projects and possibilities of their more sensible design

Natural versus anthropic causes in variations of sand export from river basins: an example from the Guadiana River Mouth (Southwestern Iberia)

Dias J. M. A., Gonzales R., Ferreira Ó.

Polish Geological Institute Special Papers

2004

Vol. 11

95-102

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.