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Register a new userLand use and land cover mapping using remote sensing and geographic information system (GIS) In Al- Qusier Region
إعداد خريطة استعمالات الأراضي و الغطاء الأرضي لمنطقة القصير باستخدام تقنيات الاستشعار عن بعد و نظم المعلومات الجعرافية
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أحمد العمر( باحث )
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تعد منطقة القصير من المناطق الزراعية الهامة في سورية، لأنها تساهم في تغطية جزء كبير من الاحتياجات الزراعية في سورية، إلا أنها تعاني من سوء استعمال الأراضي في بعض المواقع. هدفت الدراسة إلى إعداد خرائط استعمالات الأراضي و الغطاء الأرضي لمنطقة القصير، و ذلك باستخدام تقنيات الاستشعار عن بعد و نظم المعلومات الجغرافية. اعتمدت الدراسة على صور فضائية من التابع الصنعي SPOT- 4 بقدرة تمييز مكانية [( 10 م) أبيض, أسود و( 20 م) ملون]. توصلت الدراسة إلى عدة نتائج تمثلت في قدرة كل من الاستشعار عن بعد و نظم المعلومات الجغرافية في إنتاج خرائط دقيقة لاستعمالات الأراضي و الغطاء الأرضي، و تأسيس قاعدة بيانات رقمية مكانية لاستعمالات الأراضي و الغطاء الأرضي لمنطقة القصير.
Al- Qusier region is important agricultural areas in Syria, and contribute to cover a significant part of the agricultural needs of the country ,but it was suffering of poor land use in some locations. This study aims to prepare maps of land use and land cover using remote sensing and geographic information systems (GIS) techniques, the study relied on SPOT-4 satellite images with spatial resolutions 10 m for (white–black) images and 20 m for color images. The study found a view of results were the ability of remote sensing and geographic information systems in the production of accurate maps of land use/land cover and establish a digital database for spatial land use and land cover for Al- Qusier region.
References used
ENTWISLE, B, WALSH, S, J, RINDFUSS, R, R, &CHAMRATRITHIRONG, A, 1998- Land-use/land-cover and population dynamics, Nang Rong, Thailand, Washington DC: National Academy Press, pp. 121-144
GHODIEH,A, R,1994- Land use Mapping of Selected Areas of County Durham, north – east England by Satellite Remote Sensing and field Survey Methods, Durham University, England
KONING DE, G. H. J., VERBURG, P. H., VELDKAMP, A. & FRESCO, L. O., 1999, -Multi-scale Modelling of Land Use Change Dynamics in Ecuador, Agricultural Systems ,vol. 61, no. 2, pp. 77-93
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Studying of land use changing Detection needs to the speed of implementation to
convoy the changes on the ground. the traditional ways in the analysis and visual
interpretation of the images and field studying need a lot of time and effort. So The
objective of this search is to classify group images (Landsat TM , ETM+) taken in different
dates automatically, and then to calculate the area of each land use/land cover, during the
years studied (1990 -2000- 2010) and comparison areas to identify the most important
changes occurring during that period.
In developing countries, where resources are often scarce, land availability, productivity potential, capability and sustainability for agriculture and, planning and maximizing the use of the land resources for a particular land utilization type is e
ssential. In order to ensure appropriate decision and, continued and sustainable productivity, thereby continuing to support the population economically without degradation, land use planning is essential. Remote sensing (RS) and geographic information systems(GIS) are useful tools in land use planning processes .in this study 4 landscape units (costal leveled plains ,valleys and channel bed, Piedmont :slight slopping ,moderately slopping ,sever slopping ,and Summit unit) were described and compared its characteristics with the land utilization requirements for 6 land utilization types (LUT1: irrigated citrus low mechanized ,LUT2: irrigated potato high mechanized ,LUT3: irrigated tomato medium mechanized,LUT4: rainfed olive low mechanized,LUT5:rainfed wheat low mechanized, LUT6:natural forests)by using LAMIS program .the results showed that43.07% of studied area is moderate suitability S3, 27.9% is low suitabilityS4 ,and 20.24% is unsuitable N1.the land suitability evaluation for LUT2 :35.18% good suitability S2 ,35.17% moderate suitabilityS3 and 20.24% low suitability S4 and for LUT3:50.97% good suitability S2,20.04% moderate suitabilityS3 and 20.24% low suitability S4. 43.07% of lands are very suitable S1 for LUT4 ,27.91% good suitability S2 and 20.24% moderate suitabilityS3.for LUT6 ; land suitability evaluation shown that 59.24% of lands are very suitable S1 and 31.93% good suitable S2.
Land use planning processes include matching between physical and socio-economic conditions by using Definite program .optimal land utilization types are determined depending on 3 multi-criteria ( costs ,gross margin , water requirements for irrigation) and according to two scenarios ( SC1:conservative scenario with concerned to water requirements , SC2:economic scenario with concerned to gross margin ).the results showed that LUT4 is the optimal current land use type of all three physiographic units (costal leveled plains ,valleys and channel bed and slight slopping).2 suggested land utilization types ( LUT7:irrigated kiwi low mechanized ,LUT8:irrigated groundnuts high mechanized) are proposed to costal leveled plains and compared with LUT4,comparison results shown that LUT4 is the optimal land use according to SC1 and LUT7 is the optimal land use type according to SC2.for valley and
channel bed unit , the optimal land use type according to SC1 is multiple land use type ( rainfed wheat under rainfed olive trees) and according to SC2 is LUT7.3 land utilization types(LUT7,LUT8,LUT9: rainfed lentil low mechanized)are suggested for slight slopping piedmont .the results of planning process showed that the optimal land use type is LUT4 for both scenarios SC1,SC2.
Remote sensing technique is considered as one of the main sciences that grew very
fast last years. Satellite images are important and advanced source to get data about any
region on the earth. Using satellite images, integrated with geographic info
rmation system
(GIS) for mapping are considered as one of the modern applications that expanded widely
now a days.
This paper aims at integrating the techniques of remote sensing and geographic
information systems (GIS) for performing topographic study of landsat7 satellite image
taken of a part of northern part of Lattakia. The two software, Erdas Imagine and ArcGIS
are used to perform topographic analysis depending on digital processing for the image,
then analyzing its terrain. Depending on digital terrain model (DTM), 3D slope image is
derived. Land use map is written for the study area. Then, some spatial analysis are
performed to find the best positions to construct different projects that have economic
benefits.
finally, analyses and results are discussed.
The phenomenon of soil salinization is one of the most prevalent environmental problems and damages the environment, especially in dry and semi-arid areas. The detection of soil salinity and the preparation of its maps have been a great success and d
evelopment, especially after the development of mathematical models that have been worked on in different ways, including the ways in which sensor data are used in conjunction with statistical models miscellaneous.
This study aims to show the land use changes during the period 1970 – 1991.
The study includes the city of Homs and the surrounding areas, with total
surface area of 9686 ha. To carry out this study, aerial photographs were used
where sets of diff
erent periods were taken, one was taken in 1970 with a scale of
1/20000, and the other set for the year 1991 with a scale of 1/15000, the two sets
of aerial photographs were interpreted and analyzed after the delineation of the
targets, and two maps were prepared after unifying the scales and selecting the
proper legend.
The results indicated obvious changes in land use, for example, the area of
cereals crops was in 1970 about 32.9 % of the total area and decreased by 11.8
% in 1991. In the area of gardens a reasonable increase was recorded, while in
the area of vineyards an increase of about 1 % was noticed.
But the big issue is the urban expansion at the expense of arable lands, the
expansion area of housing has been increased from 8% in 1970 to 24% in 1991,
and the area of civil establishments was increased from 2.27 % in 1970 to 5.47
% in 1991, in the new concept of desertification urban expansion at the
agricultural land means a permanent desertification, this matter should be
considered seriously and the necessary measurements must be taken into
account.
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