Abstract

As most of the rural areas inMediterraneanRegion,the Celone river basin (Apulia, Italy) is characterized by diffusepollution from agriculture. Nutrient export from terrestrialecosystem to the river is controlled by hydrologicalprocesses and nutrient input frompoint and non-point sources.In the present paper, anthropogenic nitrogen input and theriverine export of nitrate-N (N-NO3) were quantified throughseveral survey campaigns, continuousmeasures of streamflowand discrete determinations of concentrations. A differentfrequency for water sampling was used, respectively, duringfloods and during normal- or low-flow state. Nitrate-N concentrationsin surface waters were found to vary considerablyacross the seasons. The riverine N-NO3 export was estimatedto be about 14 kg N ha-1 year-1. Major N inputs derivedfrom fertilizers and animal manure correspond to 68.2 and24 kg N ha-1 year-1, respectively. Nitrate-N fluxes instreamduring flood events (21 days) accounted for about 63%of the annual loading. This study clearly demonstrates theimportance of flood event contributions to the annual nutrientloading delivered to the reservoir and that more efficient fertilizersand management practices are needed to reduce Ninput.

Autore Pugliese

• De Girolamo Anna Maria , Lo Porto Antonio , Pappagallo Giuseppe

Tutti gli autori

• de Girolamo A.M.; D'Ambrosio E.; Pappagallo G.; Rulli M.C.; Lo Porto A.

Titolo volume/Rivista

Rendiconti lincei. Scienze fisiche e naturali

Anno di pubblicazione

2017

ISSN

2037-4631

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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