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Assessment of Groundwater Vulnerability Using Lulc Map and DRASTIC Technique in Bahr AL-Najaf Area, Middle of Iraq

Authors: Zaid N. Hashim --- Ali H. Al-Aboodi
Journal: Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية ISSN: 1813162X 23127589 Year: 2019 Volume: 26 Issue: 3 Pages: 1-9
Publisher: Tikrit University جامعة تكريت

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Abstract

Groundwater is the greatest significant source of water in the Bahr Al-Najaf area. In this research the DRASTIC technique has been utilized, to produce a map of ground water vulnerability for the area. Because of the relation between LULC (Land Use and Land Cover) and groundwater pollution, the LULC map was applied with the standard DRASTIC technique to confirm accuracy of vulnerability for pollution. A LULC map is extracted from Enhanced Thematic Mapper (TM) satellite imagery utilizing several methods in GIS. The LULC map shows that three portions of LULC can be recognized (Agricultural land, Wet land and Barren land). The LULC map was weighted and rated then changed to LULC index map. That index map is a supplementary factor that was combined to the standard DRASTIC technique to modify DRASTIC vulnerability in study area. The final vulnerability was obtained by the DRASTIC technique that varies from (70 to 140). The LULC index map as a modified DRASTIC with ranging of (95-175). The modified LULC of DRASTIC technique has a higher correlation (Pearson’s factor) 0.87 per concentration of nitrate values and is suggested as the best suitable technique to be utilized for the area of study.


Article
Integration Approach of Remote Sensing and GIS to Detect Land Use / Land Cover Change Dynamics in Himreen Lake and Surrounding Area
"تكامل تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية لكشف التغيرات في الغطاء الارضي واستعمالات الارض و في بحيرة حمرين والمناطق المحيطة بها "

Author: Thair Mudher Fahmy Al-Azzawi . ثائر مظهر فهمي
Journal: Al-Adab Journal مجلة الآداب ISSN: 1994473X Year: 2019 Issue: 130 Pages: 111-130
Publisher: Baghdad University جامعة بغداد

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Abstract

In this research the poem of Anne Finch, Countess of Winchelsea, “A Nocturnal Reverie” will be analyzed from an ecological perspective. Ann Finch’s contribution to understanding nature will be examined within ecocritical viewpoint and how her vision of nature is reflected in the poem. This study attempts to prove that Anne Finch was highly aware of the importance of nature in humans’ life and believed that humans are responsible for both nature and humans' welfare. With her poem Anne Finch tried to convince man that nature is a beautiful and living community that should be respected in order to reach inner harmony and to make the world a better, freer and kinder place. In the poem Finch represents nature as a united society, every part and aspect of which has its feelings, wishes and goals. Finch finds in natural society freedom and equality, but this is possible only at night. The day is the time of the “tyrant-man”, that belongs to a superior world and man suppresses the call of nature in himself. Still the tyranny of human cannot suppress nature completely because of the following reasons: a) man is not an authority, b) man feels the need in nature, and thus nature is superior to him. The study area is located north of the central part of Iraq. Some small cities lay within the area and Diyala River runs across it. It includes Himreen Lake in its middle part. The aims of this study was to develop and use applied approach for monitoring, detecting, analyzing and producing land use/cover change maps in Himreen and surrounding area during the period from 1984-2016, using remote sensing and geographic information system (GIS) techniques, as valuable contribution with high accuracy to planning and management in many fields of developments in the study area. Remote sensing techniques are used to produce Land Use/Cover (LULC) map for the study area using Landsat-8 satellite (ETM) images acquired in 2013. These images have the best compatibility properties for this purpose than other images attained in different dates, using USGS classification developed procedure. (LULC) map is produced depending on the maximum Likelihood supervised classification (ML) of (ETM) images with assessment accuracy of (97.44%) and (0.9707) kappa coefficient. In other hand, the change detection of water class in Himreen Lake has depended on the vector map of Normalized Difference Water Index (NDWI) of six scenes Landsat satellite series (ETM) images for the periods (1984, 1992, 2002, 2006, 2013, and 2016). The (LULC) raster and water index image are converted to vector structure, using ArcGIS v.10 software in order to create a digital (LULC) map.Three main classes of (LULC) are recognized in the mapped area. Those are Barren Land class (Code 7), the Barren Land Class is divided into four subclasses, which are Sandstone, Claystone, Mixed Exposed Land, and Bare soil. Agricultural Land class (Code 2), the Agricultural Land class is divided into two subclasses, which are Harvested Land and Idle Land. and Water class (Code 5), the Water class is represented by Himreen Lake. The mapped area revealed that the Barren Land Class covers the largest area, the Agricultural Land class and the Water class cover the smaller and smallest areas respectively. The Agricultural Land is represented in the eastern part of the mapped area in which the flood plain extends. Change detection of water in Himreen Lake is represented by increase and decrease periods. Three increase periods during years (1984-1992, 2002-2006, and 2013-2016) and two decrease periods during years (1992-2002, and 2006-2013) are detected. It is noticed that the decrease of water is referred to many reasons such as, shortage in rainfall, decrease in Diyala River flow release from upstream country, as well as the random irrigation acts in the study area.

هدفت هذه الدراسة الى استخدام منهج تطبيقي تحليلي لمراقبة وكشف التغيرات وتحليل وانتاج خرائط استعمالات الارض والغطاء الارضي لبحيرة حمرين والارضي المحيطة بها الواقعة الى الشمال من وسط العراق خلال الفترة من 1984 – 2016 باستخدام تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية كمساهمة تكفل الدقة العالية في التخطيط والادارة في مشاريع التنمية المختلفة .تم استخدام تقنيات الاستشعار عن بعد لانتاج خريطة لاصناف استعمالات الارض- الغطاء الارضي بالاعتماد على البيانات الفضائية للقمر الصناعي لاندسات - 8 للمتحسس TM والملتقطة عام 2013 نظرا لافضليتها من حيث الخصائص النوعية لهذا الغرض في الدراسة مقارتة ببقية المرئيات الفضائية المتوفرة بتواريخ زمنية اخرى ، اذ تم استخدام تقنية التصنيف الموجه لانتاج خريطة استخدامات الارض – غطاءات الارض اعتمادا على نظرية الاحتمالية ( العظمى( بأستخدام برنامج ERDAS V.2011 وبرنامج ARCGIS V.10 واظهرت نتائج التصنيف بأن دقة التصيف الموجه 97.44 % وان قيمة معامل كابا 0,9707 .وفي جانب اخر من الدراسة تم القيام باجراء كشف التغيير على بحيرة حمرين باستخدام دليل المياه (NDWI) لانتاج خرائط من المرئيات الفضائية نوع ETM للقمر لبصناعي لاندسات – 8 للسنوات 1992-1984، , 2006, 2002 2O13 ، 2016 باستخدام برنامج ERDAS V.2011 وبرنامج ARCGIS V.10 .اظهرت خارطة استعمالات الرض والغطاء الارضي وجود ثلاثة اصناف رئيسية ضمن منطقة الدراسة وهي: الاراضي الجرداء ، الاراضي الزراعية والمياه ، واشتمل الصنفين الرئيسين الاوليين على ثلاثة أصناف ثانوية لكل منهما ، اذ غطت الاراضي الجرداء المساحة الاكبر تليها الاراضي الزراعية واخيرا المياه . كما بينت بان الاراضي الزراعية تتركز معظمها في الجزء الشرقي لمنطقة الدراسية بسبب وقوعها ضمن السهل الفيضي الفيضي لنهر ديالى ، اما الاراضي الجرداء فتتركز معظمها في جبال منطقة الدراسة . اما خرائط كشف التغيير لبحيرة حمرين للفترة الزمنية 2016-1984 فقد اظهرت زيادة في مساحة البحيرة ثلاث فترات زمنية من 1992-1984 ومن 2006-2002 ومن 2016-2013 ، فيما اظهرت نقصان في مساحة البحيرة لفترتين زمنيتين من 2002-1992 ومن 2013-2006 . وتعود اسباب فترات النقصان في مساحة وكمية المياه في البحيرة الى عدة اسباب منها قلة التساقط المطري في تلك الفترات قلة ونقصان كمية الجريان المائي لنهر ديالى من بلد المنبع ، اضافة الى سوء ادارة الموارد المائية وطرق الري العشوائية من مياه نهر ديالى ومياه البحيرة ضمن منطقة الدراسة .

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