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Valutazione del rischio di desertificazione nel comune di Tanda (Niger)
Paperback
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ISBN10: 6209518362
ISBN13: 9786209518362
Publisher: Edizioni Sapienza
Published: Jan 30 2026
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786209518362
Publisher: Edizioni Sapienza
Published: Jan 30 2026
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Italian
Il comune rurale di Tanda, con una stagione delle piogge prolungata e attraversato dal fiume Niger, costituisce una zona di grande attrattiva. Le interazioni con la popolazione autoctona esercitano pressioni sulla rigenerazione della vegetazione. Per valutare il rischio di desertificazione, abbiamo analizzato i dati pluviometrici giornalieri dal 1931 al 2007, calcolato gli indici differenziali di vegetazione (NDVI e SAVI) delle immagini Landsat (1973, 1984, 1992 e 2002) e discusso i risultati; infine, l'immagine di Google Earth è stata confrontata con la fotografia aerea del 1975. L'analisi climatica mostra una variazione interannuale delle precipitazioni con alternanza di periodi secchi e umidi. Il confronto tra gli anni 1984/1973 e 2002/1992 mostra una tendenza alla diminuzione degli indici di vegetazione nonostante un ritorno a condizioni più umide negli anni 1992 e 2002. Tra il 1992/1984 e il 2002/1973, i risultati mostrano un aumento degli indici di vegetazione dovuto alle precipitazioni dei periodi umidi (1992 e 2002) e riflettono la difficoltà di confrontare condizioni climatiche diverse.
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Tinno Ibrahim, Ismaël
Assessment of the risk of desertification in the municipality of Tanda (Niger)
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