Ecological Dynamics of the Green Dam by Remote Sensing: The Case of Moudjbara (Djelfa, Central Algeria)

Khaouani, Boumediene; Hirche, Azziz; Salamani, Mostefa

doi:10.21506/j.ponte.2019.4.8

Cited by 6 publications

(7 citation statements)

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“…Although many efforts were made during the second period (1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999) to improve the quality of reforestation and the application of other operations such as dune fixation and track openings [29], the total area of the pine plantations decreased sharply. This degradation was mainly due to the expansion of croplands (pine plantations were harvested at some locations to increase the amount of arable land, especially for the cultivation of cereals), livestock overgrazing and phytophagous attacks [33]. It should be noted that the use of monospecific stands of Aleppo pine has resulted in a proliferation of the pine caterpillar processionary, which has destroyed most of the reforestations [17,34,35].…”

Section: Discussionmentioning

confidence: 99%

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

Benhizia¹,

Kouba²,

Szabó³

et al. 2021

Preprint

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Green walls and green dams are increasingly being considered as part of many nation-al and international desertification initiatives. This paper studies the spatiotemporal evolution of the green dam in the Moudjbara region (Djelfa Province, Algeria) from 1972 to 2019 by using Landsat imagery, Land Change Modeler and Open Land package. The future evolution of pine plantations for the year 2029 was also forecasted, based on an anthropogenic scenario (i.e., an-thropogenic pressure is the main driver of the green dam destruction). Our findings revealed that the green dam project was successful for a few years, but after that, pine plantations deteri-orated significantly due to forest harvesting, livestock overgrazing, and the proliferation of the pine caterpillar processionary, which destroyed most of the reforestation. Land Change Modeler predicted a huge degradation of pine plantations for the year 2029, and if the deforestation con-tinues at the same rate, the green dam will disappear in the Moudjbara region during the next few decades. Aware of this threat, the Algerian authorities are now planning to reforest more than 1.2 million ha under the latest rural renewal policy by introducing new principles related to sustainable development, fighting desertification, and climate change adaptation

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Section: Discussionmentioning

confidence: 99%

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

Benhizia¹,

Kouba²,

Szabó³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Although many efforts were made, during the second period (1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999), to improve the quality of reforestation and the application of other operations, such as dune fixation and track openings [29], the total area of the pine plantations decreased sharply. This degradation was mainly due to the expansion of croplands (pine plantations were harvested at some locations to increase the amount of arable land, especially for the cultivation of cereals), livestock overgrazing, and phytophagous attacks [35]. It should be noted that the use of monospecific stands of Aleppo pine has resulted in the proliferation of pine caterpillar processionary, which has destroyed most of the reforestations [6,36,37].…”

Section: Discussionmentioning

confidence: 99%

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

et al. 2021

View full text Add to dashboard Cite

Green walls and green dams are increasingly being considered as part of many national and international desertification initiatives. This paper studies the spatiotemporal evolution of the green dam in the Moudjbara region (Djelfa Province, Algeria), from 1972 to 2019, by using Landsat imagery, Land Change Modeler, and OpenLand package. The future evolution of pine plantations, for the year 2029, was also forecasted, based on an anthropogenic scenario (i.e., anthropogenic pressure is the main driver of the green dam destruction). Our findings revealed that the green dam project was successful for a few years, but, after that, pine plantations deteriorated significantly, due to forest harvesting, livestock overgrazing, and the proliferation of the pine caterpillar processionary, which destroyed most of the reforestation. Land change modeler predicted a huge degradation of pine plantations for the year 2029, and if the deforestation continues at the same rate, the green dam in the Moudjbara region will disappear during the next few decades. Being aware of this threat, the Algerian authorities are now planning to reforest more than 1.2 million ha under the latest rural renewal policy, by introducing new principles related to sustainable development, fighting desertification, and climate change adaptation. We strongly recommend moving away from the singular tree planting focus, to diversifying desertification control methods.

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“…East longitude, revealed that the average precipitation is about 318 mm, the average of the of the maximum temperatures of the hottest month is 33.8 °C, and average of the minimum temperatures of the coldest month is 0.1 °C. The Emberger's pluviothermic quotient (Q2) for the study area is 33.57, which places the study area in the cool lower semi-arid stage [15].…”

Section: Administrative and Geographical Locationmentioning

confidence: 93%

“…The field of intervention of the green dam is constituted by the pre-Saharan zone included between the isohyets 300 millimeters in the North and 200 millimeters in the south. The first reforested perimeter of Moudjbara in 1972 gave encouraging results [15,16]. Plantations in the Moudjbara region remain a minority but have experienced a remarkable progression between 1972 and 1987 in the reforested area (Khaouani et al, 2019).…”

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confidence: 99%

“…The first reforested perimeter of Moudjbara in 1972 gave encouraging results [15,16]. Plantations in the Moudjbara region remain a minority but have experienced a remarkable progression between 1972 and 1987 in the reforested area (Khaouani et al, 2019). The predicted increase in aridity in Algeria due to global climate change in the next decades has been widely accepted.…”

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confidence: 99%

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Assessing the evolution of the Aleppo Pine plantations by using field measurements and one-way Analysis of variance

Khaouani

Hirche

Bouarfa

et al. 2022

TSSJ

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Moudjbara area considered a gateway to Algeria's Great Sahara, was the first perimeter to be afforested with Aleppo pine in 1972 as part of a green dam initiative to combat desertification and preserve soil from wind erosion. This study examines the evolution of the species Pinus Halepensis Mill commonly known as the Aleppo pine in the Moudjbara plantations by comparing it to that of the natural forest of the Djellal Mountains in the Chergui region. Several field surveys were conducted, and four sites were selected in the natural forest and four sites in the Moudjbara afforestation. In each site, we performed 50 dendrometric measurements with 200 tree stakes. The selection is based on information on regeneration and plant quality. Stations are classified into four categories namely station of good regeneration, station slightly well regenerated, station moderately regenerated, and station of weak regeneration, which allow us to have primary reference data and to make a reliable assessment of the behavior of Aleppo pine in the Green Dam. The attribute ranking obtained from the ANOVA approximation provides us with crucial information of comparison between the natural forest and the reforestation zone. The results obtained can be used to adjust the planting density, rigorously choose the species, and adapt the soil preparation and planting techniques.

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Ecological Dynamics of the Green Dam by Remote Sensing: The Case of Moudjbara (Djelfa, Central Algeria)

Cited by 6 publications

References 0 publications

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

Monitoring the Spatiotemporal Evolution of the Green Dam in Djelfa Province, Algeria

Assessing the evolution of the Aleppo Pine plantations by using field measurements and one-way Analysis of variance

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