CLIMATIC DROUGHT IN THE SEMI-ARID REGION OF DJELFA –ALGERIA (ANALYSES OF THE RAINFALL DATA FROM 1975 TO 2016)

G. BOUBAKEUR

Abstract


In the context of sustainable development and the recent climate warming in the semi-arid region of Djelfa whose vegetal production of pastors depends solely on rainfall, analyses of the rainfall data for the last 42 years were mandatory basing on the coefficient of variation CV, the precipitation concentration index PCI, simple linear regression, Mann Kendall test, Sen’s slope and finally the homogeneity tests. As results, a drastic variability was recorded for all the monthly and annual rainfall from year to another with no seasonality; namely a strong hydric stress would threaten plants subsistence and cause summer flood that destroys soil. Moreover, an annual decreasing was due to almost of months decreases particularly winter and spring. However, August, September and October recorded slight increases to let expect an eventual autumnal advance in August instead of September. This goes along with trend results whose the maximal decreasing trend was in November,then January. However, the increasing trend was the most in August, and July had also an increasing trend. In fact, the significant decreases were due in part to the abrupt decreases almost in winter then spring. Under the desertification threat, this drought and the drastic hydric stress make a real challenge to development.


Keywords


Climate change, steppe, Mann Kendall, Sen’s slope, homogeneity, Coefficient of variation (CV), Precipitation concentration index (PCI).

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References


BENSOUIAH R. (2003). La lutte contre la désertification dans la steppe algérienne les raisons de l’échec de la politique environnementale’, Communication aux 15èmes Journées de la Société d’Ecologie Humaine (Du Nord au Sud le recours à l’environnement, le retour des paysans?), Marseille, 11–12 Décembre.

BOUBAKEUR G., SAHNOUN M., CHAKALI G. (2017). Analysis of the air temperature records of Djelfa’s meteorological station from 1975 to 2014 ‘the reality of Djelfa’s climate warming’, International Journal Of Global Warming(IJGW), Vol. 12, Issue 1, pp. 66-84.

BOUBAKEUR G. (2016). La steppe algérienne dans le contexte des changements climatiques (cas de Djelfa- Algérie), thèse de doctorat, University of Ouargla, 117 p.

BOUBAKEUR G., SAHNOUN M., CHAKALI G. AZOUZI B. (2014). Réchauffement climatique, une réalité vécue à Djelfa, Revue des BioRessouces, Vol. 4, Issue 2, pp.8–17.

BOUBAKEUR G. (2009). Les changements climatiques dans le milieu steppique, Evaluation-Causes - Impacts (Cas de Djelfa), thèse de Magister, université de Djelfa, 120p.

DJEBAILI S., DJELLOULI Y., DAGET P. (1989). Les steppes pâturées des Hauts Plateaux algériens, Fourrages, vol.120, pp. 393-400.

DOMINIQUE D. (2005). Une introduction à la méthodologie de Box et Jenkins L’utilisation de modèles ARIMA avec SPSS, Revue MODULAD, Vol.33, pp.1-24.

DPAT (DIRECTION DE LA PLANIFICATION ET DE L’AMENAGEMENT DU TERRITOIRE) (2004). Monographie de la wilaya de Djelfa, Wilaya de Djelfa, 224p.

DRÁPELA, K., DRÁPELOVÁ I. (2011). Application of Mann-Kendall test and the Sen’s slope estimates for trend detection in deposition data from Bílý Kříž (Beskydy Mts., the Czech Republic) 1997–2010’, Beskydy, Vol. 4, issue. 2, pp.133–146.

FRANÇOIS L., CHRISTIAN P. (2005). Appréhender le niveau de sécheresse dans le cadre des études situationnelles et de la gestion forestière à partir d’indices bioclimatiques, Rev.For. Vol. 04, pp. 331-356.

FRANCIS N., TSUNEMI W. (2013). Rainfall variability and crop production in northern Ghana the case of Lawra district, Project CRUMA (Community-based Rainfall Uncertainty Management Approach), Kochi University of Technology, Conference Paper.

HERVÉ A. (2010). Coefficient of Variation, In Neil Salkind (Ed.), Encyclopedia of Research Design, Thousand Oaks, CA Sage, 5p.

HAMED, K.H. (2009). Exact distribution of the Mann-Kendall trend test statistic for persistent data, Journal of Hydrology, Vol. 365, pp. 86–94.

HELLAL T., HELLAL B., BARDADI A., AYAD N., ENSMIRA Z. (2014). Incidences de la pluviométrie sur la culture des céréales dans la steppe du sud de la préfecture de Sidi bel’abbes (Algérie occidentale), European Scientific Journal, vol.10, issue 17. pp. 364- 374.

HOSSEIN T., P. HOSSEINZADEH T. (2011). Analysis of trends in temperature data in arid and semi-arid regions of Iran, Global and Planetary Change, vol. 79, pp. 1–10.

IPCC (2001). Climate Change 2001(Impacts, Adaptation, and vulnerability), Contribution of Working Group II to the Third Assessment Report, Cambridge University Press, 1032.18.

IPCC (2007). Climate Change 2007: Working Group I: The Physical Science Basis, chapter 3; 3: Changes in Surface Climate: Precipitation, Drought and Surface Hydrology, IPCC Fourth Assessment Report, https://www.ipcc.ch/ publications_and_data/ar4/wg1/en/ch3s3-3.html [accessed on October 28th, 2017 at 22:46]

IPCC (2014). Climate change 2014, Synthesis report, Summary for the policymakers.

JACQUES B., ERIC P., JEAN-JACQUES B. (2000). Statistique pour l’environnement (traitement bayésien de l'incertitude), Edition Tec et Doc, Paris, 363p.

KENDALL M. G. (1938). A New Measure of Rank Correlation, Biometrika, Vol.30, issue½, pp. 81-93.

KHALED H, HAMED A, RAMACHANDRA R. (1998). A modified Mann-Kendell trend test for auto-correlated data, Journal of hydrology, Vol. 204, pp. 182-196.

LE HOUEROU, H.N., CLAUDIN, J., POUGET, M. (1977). Etude bioclimatique des steppes algériennes avec une carte bioclimatique à 1 j1.000.000ème, Bull. Soc. Hist. nat. Afr. Nord [online], http//horizon.documentation.ird.fr/exl-doc/pleins_textes/ divers09-04/29910.pdf . (Accessed on May12th, 2015).

L’HÓTE, Y., MAHE, G., SOME, B., TRIBOULET, J.P. (2002). Analysis of a Sahelian annual rainfall index from 1896 to 2000; the drought continues, Hydrological Science Journal, vol. 47, pp. 563-572.

M. DE LUIS, J. C., GONZALEZ H., BRUNETTI M., LONGARES L. A. (2011). Precipitation concentration changes in Spain 1946–2005, Natural Hazards and Earth System Sciences, vol. 11, pp. 1259–1265.

MILAN G., SHAHABODDIN S., ZAIDI R., DALIBOR P., SUDHEER C., SLAVISA T. (2016). Long-Term Precipitation Analysis and Estimation of Precipitation Concentration Index using Three Support Vector Machine Methods, Advances in Meteorology, 11p.

MILAN G., SLAVISA T. (2013). Analysis of changes in meteorological variables using Mann-Kendall and Sen's slope estimator statistical tests in Serbia, Global and Planetary Change, Vol.100, pp. 172–182.

MINGZHU H., FEIKE A. D. (2014). Drought effect on plant nitrogen and phosphorus (a meta-analysis), new physiologist, Vol. 204, Issue 4, Version of Record online, pp.924–931.

MIRELLA L. (2006). Automatic Evaluation of Information ordering: Kendall’s Tau, Computational Linguistics, Vol. 34, issue4, pp.471-484.

NEDJRAOUI D., BEDRANI, S. (2008). La désertification dans les steppes algériennes causes, impacts et actions de lutte, VertigO la revue électronique en science de l’environnement, Vol. 6, issue 1. [online] http//vertigo.revues.org/5375? lang=en#text. (accessed on May 7th, 2015).

NICHOLSON, S.E., SOME B., KONE, B. (2000). An analysis of recent rainfall Conditions in West Africa, including the rainy seasons of the 1997 ElNino and the 1998 La Nina years, Journal of Climate, Vol. 13, issue14. pp. 2628–2640.

NNYALADZI B. , BRENT Y. (2010). Rainfall variability and trends in semi-arid Botswana: Implications for climate change adaptation policy, Applied Geography, Vol. 30, Issue 4, pp. 483-489.

OGUNTUNDE, P.G., FRIESEN, J., VAN DE GIESEN, N., SAVENIJE H.H.G. (2006). Hydroclimatology of the Volta River Basin in West Africa (trends and variability from 1901 to 2002), Physics and Chemistry of the Earth, Vol. 31, issue 18, pp. 1180–1188.

SHENG Y., POL P., GEORGE C. (2002). The power of the Mann-Kendall and Spearsman's rho test for detecting the monotonic trends in hydrological series, Journal of hydrology, Vol. 259, pp. 254-271.

SOLTANI, E., SOLTANI, A. (2008). Climatic change of Khorasan, North-East of Iran, during 1950–2004, Research Journal of Environmental Science, Vol. 2, issue 5, pp. 316–322.

TOBY R. A., JULIA E. C., JONATHAN T. O., GREGORY T. P., DAVID M. M. (2014). Assessing the Risk of Persistent Drought Using Climate Model Simulations and Paleoclimate Data, Journal of Climate, Vol.27, pp. 7529- 7549.

POUGET M. (1980). Les relations sol végétation dans les steppes sud algérois, O.R.S.T.O.M, Paris, 569p.

YAN H., CUNZHU L., ZHIYONG L., ZHONGLING L., BAILING M., CHUNGUANG H., LIANXI S. (2015). Impact of precipitation patterns on biomass and species richness of annuals in a dry steppe, PLoS ONE, Vol. 10, issue 4.

YEN Y. L., LAWAL B., AJIT S. (2015). Effect of climate change on seasonal monsoon in Asia and its impact on the variability of monsoon rainfall in Southeast Asia, Geoscience Frontiers, Vol. 6, pp. 817-823.


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