Release of nutrients into a forested catchment of southern Italy

Callegari, Giovanni and Infusino, Ernesto and Veltri, Antonella and Cantasano, Nicola (2014) Release of nutrients into a forested catchment of southern Italy. In: XXXIV Convegno Nazionale di Idraulica e Costruzioni Idrauliche, 7-10 settembre 2014, Bari.

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The mountain catchments are the main source of a good quality water supply. A correct water management suggests policies aimed to the planning, the optimization and, above all, the protection of this valuable natural resource. To date, there are some models, more or less complex, used in the management of water resources or pretending the water supplies and the hydraulic loading of solutes. Some of these patterns disregard the extent of bottom pollution caused by site features and by atmospheric deposition affecting the fixation, volatilization, absorption and release of biogenic substances. This work aims to aid in the knowledge of the relationships between soil and atmosphere systems through the comparative analysis of nutrient depositions and their following release into water outflows in a small experimental catchment located in the Cosenza district of Sila Greca (Calabria, Italy) extending for a surface of 139 ha and without human settlements. The study area, expanded from 975 m. a.s.l. to 1300 m. a.s.l., is forested for about 95% of its surface of which 80 % is covered by Calabrian Pine (Pinus laricio, Poiret) with populations differentiated by age, density, tree canopy cover and stand characteristics. Small areas are interested by chestnut (Castanea sativa, Miller) reforestations. The remaining basin surface is composed by clearings (2%), sowable lands (1.4%) and catchment ditches (8.2%) colonized, to a large extent, by black alder (Alnus glutinosa, Linnaeus) and aspen (Populus tremuloides, Linnaeus). The climate data concerning Lake Cecita Station, located at 1.100 m. a.s.l. and ongoing from 1924 to 2010, are deduced from the Annals of Hydrographic Service of Catanzaro Unit. The rainfall regime, belonging to the Mediterranean type, shows an average annual value of 1046.6 mm distributed in 99 rainy days. On a monthly basis, the higher rainfall media data have been recorded in the months of October and November, even though the month with the highest rainfall, in all the measurement period, is January 1945 with 391.7 mm. The lowest values have been recorded in the months of June, July and August. Besides, it is pointed out a great monthly variability in the regarded period. Finally, July is the month lacking in rainfall during many years of the tested time. The average monthly temperature is 9.9 °C with a mean value of 2.0 °C in the coldest month and a mean value of 18.6 °C in the hottest month. The geological structure of the basin consists of a crystalline basement formed by intrusive and plutonic rocks generally fractured except some cutting valleys. The soils, greatly on plutonic rocks, lead to the “Typic Xerumbrepts” association and, in small way, to the “Ultic Haploxeralfs” in the surface layers of pleistocenic sediments (stream terrace).

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Forested catchment; Hydrological processes; Solute transport; Nutrients; Calabrian pine
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia
500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.4 Geomorfologia e idrosfera
Depositing User: Dr Nicola Cantasano
Date Deposited: 12 Dec 2016 10:10
Last Modified: 12 Dec 2016 10:10

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