Spatio-temporal assessment of drought in the semi-arid region of Algerian steppe through index and remote sensing

• Autorzy: Bouarfa Said , Farhi Yassine , Youb Okkacha , Boultf Meriem , Djoudi Warda , Faci Mohammed

Identyfikatory

DOI

10.24425/jwld.2022.140799

• Języki publikacji: EN

Abstrakty

EN

The scarcity of annual rainfall, which sometimes spreads over successive years, causes persistent droughts. In order to study the drought severity on the Algerian steppe, we analysed precipitation data (1985-2015) from the weather stations of Ain Sefra, El Bayadh, Tiaret and Djelfa, using drought meteorological indices: the mean deviation, the standardised precipitation index, the rainfall index and the frequency analysis of the rainfall series. Thus, we adopted the diachronic study by satellite remote sensing for the years 2002 (the driest year) and 2009 (the wettest year), which allowed us to better understand the evolution of the steppe rangelands surface and to better interpret their spatial-temporal changes. Drought, as determined by the mean deviation index, occurred during two periods (in sequence and corresponds to 55% the sequences of deficit years), one over 12 years (from 1994/1993 to 2006/2005) and the other over 5 years (1985-1990) and with isolated years. The results of the diachronic study of the vegetation change demonstrate the obvious divergence of the vegetation cover between 2002 and 2009. Drought has impacts on vegetation composition, growth, productivity, structure and functioning of ecosystems, which limits regeneration of vegetation cover.

Słowa kluczowe

EN

drought; indices; remote sensing; spatial-temporal analysis; steppe

• Wydawca: Wydawnictwo ITP
• Czasopismo: Journal of Water and Land Development
• Rocznik: 2022
• Tom: no. 53
• Strony: 210--218
• Opis fizyczny: Bibliogr. 35 poz., rys., tab., wykr.

Twórcy

autor

Bouarfa Said

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0001-5392-7537

autor

Farhi Yassine

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0001-9506-4952

autor

Youb Okkacha

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0001-9331-0881

autor

Boultf Meriem

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0001-9998-2224

autor

Djoudi Warda

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0002-9502-5192

autor

Faci Mohammed

• Centre for Scientific and Technical Research on Arid Regions Omar El Bernaoui – CRSTRA, Campus Universitaire, Med Kheider, BP 1682 R.P Biskra 07000, Algeria

• https://orcid.org/0000-0003-0284-1148

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).