Abstract
The objective of this work is to study and analyze the human impact on agro-forestry-pastoral ecosystem of Khenchela region through the application of multi-criteria analysis methods to integrate geographic information systems, our methodology is based on a weighted linear combination of information on four criteria chosen in our analysis representative in the vicinity of variables in relation to roads, urban areas, water resources and agricultural space, the results shows the effect of urbanization and socio-economic activity on the degradation of the physical environment and found that 32% of the total area are very sensitive to human impact.
Highlights
IntroductionThe study area is located in the east of Algeria, South East Constantine and the foothills of Mount Aures between ° 06'36 '' ° 41'21 '' north latitude and between ° 34'12 '' ° 35'56 '' East longitude, it covers a total area of neighboring 144,231.75 hectares, with a population of 399,200 inhabitants
The eastern Aures is part of the arid and semi arid Mediterranean, and consist of a unique ecosystem, they are experiencing a strong trend of degradation that results in the reduction of the biological potential and disruption of the ecological balance, Khenchela is an agro-forestry-pastoral vocation region experienced a strong population growth coupled with uncontrolled spatial development of the territory. causes an advanced state of degradation, due to anthropogenic actions: deforestation, overgrazing, overexploitation of groundwater and urbanization
Very sensitive areas: these very sensitive areas are the most vulnerable to ecosystem degradation by the influence of human intervention areas, these areas are around the masterpiece places of the wilaya of Khenchela and communications channels, especially in the Nord party distinguished by many of the chief towns and cities that colonize the alfa grass Nemamcha of the region and the forest Esalhin Hamam, the estimate of the proportion of these very sensitive to human activities areas compared to the total area the study area is of 32.89%, an area of 47,437.57 hectares, these zones characterized by the degradation of ecosystem to the irreversibility of the land and the radical change in land use
Summary
The study area is located in the east of Algeria, South East Constantine and the foothills of Mount Aures between ° 06'36 '' ° 41'21 '' north latitude and between ° 34'12 '' ° 35'56 '' East longitude, it covers a total area of neighboring 144,231.75 hectares, with a population of 399,200 inhabitants It consists of 21 town, it rises to 2326 m Ras Kulthum, is the highest of northern Algeria, it is characterized by high gradients. The wilaya of Khenchela that is limited; Wilaya five, whose ties remain very strong in all areas of economic and social activity, it is a hyphen, no less significant between the North / East and South of the country It is at the gateway of the great cities of the south, not far from the northern metropolitan cities. It is characterized by its agro-forestry-pastoral or agricultural area represents 22% forests, 12% and steppe represents 49% of the total area of the study area
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