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Register a new userAssessment Sensitivity Of Landslides In The Syrian Coast Using Geographic Information Systems
تقييم الحساسية للانهيارات الأرضية في الساحل السوري باستخدام نظم المعلومات الجغرافية
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إن الهدف الأساس من هذه الدراسة هو إنتاج خريطة الحساسية للانهيارات الأرضية باستخدام نظم المعلومات الجغرافية في الساحل السوري. في المرحلة الأولى من الدراسة، 75% من مواقع الانهيارات الأرضية (45 موقعاً من الانهيارات الأرضية) استخدمت كعينات بيانية تدريبية و الباقي استخدم (15 موقعاً من الانهيارات الأرضية) كعينات بيانية للتحقيق. تم توظيف 14 طبقة من البيانات كعوامل شرطية لحدوث الانهيارات الأرضية. هذه العوامل هي الميل، اتجاه الميل، الارتفاع، الانحناء الأفقي، الانحناء الرأسي، الانحناء المماسي، نسبة مساحة السطح (SAR)، الليثولوجيا، استخدام الأراضي، المسافات عن الفوالق، المسافات عن الأنهار، المسافات عن الطرق، دليل الرطوبة الطبوغرافي TWI))، دليل قوة لتيار المائي ((SPI. باستخدام هذه العوامل الشرطية تم حساب دليل الحساسية للانهيارات الأرضية. بعد ذلك، رسمت النتيجة في برنامج ArcGIS و حصلنا على خريطة الحساسية للانهيارات الأرضية. تعتبر خريطة الحساسية الناتجة مفيدة في مجال تخطيط استخدامات الأراضي العامة.
The main goal of this study is to produce landslide sensitivity mapusing GIS at Syrian Coast area.At the first stage of the study, 75% of the landslides locations (45 landslide locations) are used as training dataset and the rest was used as (15 landslide locations) the validation dataset. Fourteen input data layers were employed as landslide conditioning factors in the landslide sensitivity mapping. These factors are slope degree, aspect, altitude, plan curvature, profile curvature, tangential curvature, surface area ratio (SAR), lithology, land use, distance from faults, distance from rivers, distance from roads, topographic wetness index (TWI) and stream power index (SPI). Using these conditioning factors, landslide sensitivity index was calculated. Subsequently, the result was plotted in ArcGIS and landslide sensitivity map was obtained. The produced sensitivity map is useful for general land-use planning.
References used
POURGHASEMI, H. R.؛PRADHAN, B. ؛GOKCEOGLU,C.andMOEZZ, K.D.Landslide Susceptibility Mapping Using a Spatial Multi Criteria Evaluation Model at Haraz Watershed. Springer-Verlag Berlin Heidelberg, Iran,2012,23-49
POURGHASEMI, H. R.؛ JIRANDEH, G. A., PRADHAN, B.؛ XU, Cand GOKCEOGLU, C.Landslide susceptibility mapping using support vector machine and GIS at the Golestan Province. Indian Academy of Sciences, Iran, 2012, 349-369
ABD LATIF, Z. ؛ PRADHAN, B. and AMAN, S. N. Spatial probabilistic approach on landslide susceptibility assessment from high resolution sensors derived parameters, Earth and Environmental Science, United Kingdom 2014, 1-6
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Groundwater In Lattakia basin using Arc GIS 9.2 Where the modified Drastic system has
been developed by combining the land uses and its divisions with general Drastic model
.As a result, final values of Drastic have been modulated into two categories "low and
moderate sensitivity"
It has been found that the introduction of the human criteriahas increased the
potentialof the moderate sensitivity of the Groundwater.
As a final result, the general content of the sensitivity map which has been
establishedfor Lattakia basin, showed, the domination of low sensitivity category in the
north western and the north eastern areas which has big location depths of the Groundwater
and high topographic altitudes.In contrast, the moderate sensitivity category dominated in
the southern areas of the study region.
The latter areas which are characterized by the existence of varied human activities
havelocation ofGroundwater levels close to the surface.
3D models of historical sites and monuments are very interesting in archaeology and digital tourism fields. These models help archeologists document historical sites and analyze the relationships between their components. Moreover, 3D models constitu
te an attractive factor that encourages visiting sites and presents virtual information about cultural heritage.
In this paper, we propose an approach that uses capabilities of CAD (Computer Aided Design) and GIS (Geographic Information System) systems to construct spatial and semantic database for historical sites and modeling them in 3D. Users of the mentioned database can use it to gather information about sites and to navigate across them via the animation capabilities in GIS.
The proposed ideas will be applied on the historical site of Ras-SHAMRA in Lattakia. Spatial data concerning the site will be acquired form a topographic plan designed in 2004. These data will then be processed and introduced into GIS environment. ArcGIS software will be used to achieve an Archeological Information System (AIS) for the site and to construct a 3D model of the site and the royal palace.
This research highlights the vital role of Pavement Management Systems integrated with Geographic Information Systems in planning and managing road maintenance in Lattakia, and getting a flexible local system by following a new method in processing a
nd viewing information that supports maintenance decision.
This study included applying a pilot project for managing pavement maintenance over a group of roads following The General Establishment for Road Communications. Those roads were divided to links and segments then evaluated using the " Asphalt Institute Method ", which gave us a numeric pointer that led in turn to the type of maintenance needed for a particular pavement. In this research, we depended on the Geographic Information Systems to design and build a comprehensive database, that reflected the present condition of the studied roads, and enabled us to store, analyze and document pavement surface condition and link it to the digitized maps of the studied roads. This guaranteed easy and direct access to various kinds of data and solutions as every segment appeared in a different color reflecting its conditions according to the theme of the map. By doing so, we could support the process of taking right maintenance decisions.
This research aimed for using Geographic Information System (GIS) in producing
Digital Elevation Model (DEM) for Dimas District, By applying various methods: Spatial
Analyst, Geo Statistical Analyst, Triangulated Irregular Network (TIN), and interp
olating
DEM from contour lines.
The study showed that the best methods for interpolating DEM is Kriging method,
Which interpolated an evaluated surface for scattered points which had (Z values) whether
they were closed or scattered from each other. And (TIN) method which required less area
on hard disc to be stored comparing with other methods, and it's perfect for representing
surfaces in wide areas, Also generating DEM from contour lines produced DEM which had
very accurate representing for surfaces.
نظم المعلومات الجغرافية
(Geographic Information System (GIS
التحليل المكاني
Kriging
نموذج الارتفاع الرقمية
المسافة الموزونة المعكوسة
الاشتقاق المكاني
المنهجية المنتظمة
المنهجية المتواترة
التحليل الجيو إحصائي
السطح المستمر
التخمين الإحصائي
التحليل ثلاثي الأبعاد
الشبكة المثلثاتية غير المنتظمة
خطوط التسوية
(Digital Elevation Model (DEM
Contour Lines
(Triangulated Irregular Network (TIN
3D Analyst
Continuous Surface
المزيد..
The Marketing information systems are considered the backbone
of decision making, particularly these needed to run facilities with
higher efficiency and effectiveness of marketing process. The study
recommends that the served facilities ought to d
evelop the
organizational structure, in away leaving the routine more over
forwarding towards more flexible structures, and decentralization in
decision making. As well as getting rid of operation standards,
standing in the hand in order to rationalization of the decision made.
And getting the valuable, credibility and economic information at
suitable time allows to rationalization and directing activities the
existing process of marketing the rationalization and directing
activities to achieve at higher level, This enforce the facility to be
awareness to the importance of providing effective marketing
information system, This make it able to govern the process of
decision making, reduce the time and effort which is responsible for
search from information and analysis it, and enable it be able to
assess the prospects for the future, and the face of environmental
changes.
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