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Register a new userMonitoring Urban Expansion of Homs City and its surrounding Using Remote Sensing &Geographic Information System between (1972-2010)
رصد الزحف العمراني لمدينة حمص و ما حولها بين عامي 1972 و 2010 باستخدام تقانات الاستشعار عن بعد و نظم المعلومات الجغرافية
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أحمد العمر( باحث )
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يهتم هذا البحث بدراسة التوسع العمراني لمدينة حمص و ما حولها خلال الفترة الواقعة ما بين عامي ( 1972 و 2010 )، باستخدام تقنيات الاستشعار عن بعد و نظم المعلومات الجغرافية. و تبين أن المساحة العمرانية لمدينة حمص قد تضاعفت خلال هذه الفترة على نحو عشوائي غير مدروس على حساب الأراضي الزراعية، و بنسبة ( 600% ).
This study was related to the urban development of Homs City and its surrounding between 1972 – 2010 by using remote sensing technique and geographic information system. The results of the study indicated that the size of the city was increased 600% times , randomly and eliminating most of crop lands.
References used
Yagoub , M.M., 2006 , Monitoring coastal zone land use and land cover changes of Abu Dhabi using remote sensing, Journal of the Indian Society of Remote Sensing, Vol. 34, No. 1
هريمات، نادر، و آخرون ، 2000 ، دراسة التغير في مساحة الغطاء النباتي الأخضر لمنطقة حوض نهر الأردن باستخدام تكنولوجيا الاستشعار عن بعد، ندوة حول الاستخدامات المستدامة للأراضي، بيت لحم، فلسطين .
شاعر، عيسى، 1993 دراسة التوسع العمراني في مدينة الرياض ، باستخدام الصور الجوية و المناظر الفضائية، بحوث جغرافية، العدد رقم 14 الجمعية الجغرافية السعودية.
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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.
This study includes a full analysis of climatic, vegetation, and topographical factors in Nabe Matta preserve (Drekish Region – Tartous Governorate – Syria), which is considered as the most important factors affecting forest fires. The data were coll
ected for each fire and analyzed by statistical programs (SPSS) and (EXCEL), and the relationship between these multiple factors and the phenomenon of recurrence of fire in one area (fire risk region) was studied. Then the data and the results of the analysis and multi relationship had been studied within the geographic information system software (GIS) to obtain the map of fire risk region, as well as results from topographic maps (1:50.000), aerial photographs (1:25.000), and the needed maps were designed for the study such as (slope map - aspect map - vegetation cover map - infrastructure map - fire risk region map),then places of monitoring towers and centers of rapid intervention in high-risk areas have been proposed for the occurrence of fires. These maps are considered as warning systems and with it we can predict the probability of any fire in the Preserve when the appropriate conditions are provided for it.
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.
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.
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 an
d 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.
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