INTEGRATION OF MULTI-SOURCE DATA IN A GEOGRAPHIC INFORMATION SYSTEM (G.I.S.) FOR THE DIAGNOSIS OF DEGRADED SOILS IN THE WATERSHED OF WADI MINA - CASE OF SUB-WATERSHED OF WADI YELLEL ‐ NORTH WEST ALGERIA
|Baghdadi Djilali 1*, Hartani Ahmed 1 Aibout Farid 1 Chouieb Mohamed 1 Benaradj Abdelkrim2
|Corresponding Author: Baghdadi Djilali,Department of Agricultural Sciences, University of Abedelhamid Ben Badis, Mostaganem 27000, Algeria, E-mail: [email protected]|
|Received: 04 May 2014 Accepted: 17 May 2014|
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Integration of multi-source data in a Geographic Information System (G.I.S.) for the diagnosis of degraded soils in the watershed of wadi Yellel - North West Algeria. The objective of this work comes in the context of an ecological and agro-pedological study of degraded soils in the watershed of wadi Yellel, the main tributary of the Wadi Mina, which drains an area of 15 000 ha. this one is mainly composed of Tertiary marls, justifying the name of marl zone. The study area suffers the Mediterranean climate conditions with 5-6 dry months’ and interannual variation of 305 mm. Vegetation covers only 7.20%, which leads to early degradation. The establishment of Geographic Information System (GIS) allows the knowledge of the spatial variability of wadi Mina water shed physical characteristics. The results show that soils in the southern part of the water shed are often clayey (36-50% clay) unsalted and those of the north are sandy clay soils unsalted, characterized by a rate of sand varies between 7 and 44% and with a very high content of salts. These soils are either used for agriculture or abandoned and colonized by the halophytes. The product of this study is firstly a database and also a tool for decision making regarding the development of marly semiarid areas.