NATIONAL BIBLIOGRAPHY NUMBER
Number
۶۰۶پ
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
per
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
بررسی تاثیر عناصر هیدرو اقلیمی بر نوسانات سطح آب دریاچه ارومیه با استفاده از سنجش از دور
First Statement of Responsibility
/شیرزاد عباسیان
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
: دانشکده علوم انسانی و اجتماعی
Date of Publication, Distribution, etc.
، ۱۳۸۷
Name of Manufacturer
، قلی زاده
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
۱۱۰ص.
Other Physical Details
:مصور،جدول،نمودار،عکس ،نقشه۳۰*۲۹ س.م - + لوح فشرده
NOTES PERTAINING TO PUBLICATION, DISTRIBUTION, ETC.
Text of Note
چاپی
INTERNAL BIBLIOGRAPHIES/INDEXES NOTE
Text of Note
واژه نامه بصورت زیرنویس
Text of Note
کتابنامه ص.:الف - و
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
دکتری
Discipline of degree
جغرافیای طبیعی-هیدرو اقلیم‌گرایش کلیماتولوژی
Date of degree
۱۳۸۷/۰۶/۲۵
Body granting the degree
دانشگاه تبریز
SUMMARY OR ABSTRACT
Text of Note
بررسی نوسانات سطح آب دریاچه ها موضوعی است که به لحاظ حساسیت ،اهمیت و ماهیت این منابع آبی به عنوان یک میراث طبیعی در سالهای اخیر توجه محققین علوم مختلف بویژه اقلیم شناسان و زیست شناسان را به خود جلب کرده است .هدف اصلی تحقیق حاضر بررسی نوسانات سطح آب دریاچه ارومیه به منظور حفظ آن به عنوان بزرگترین دریاچة داخلی ایران و بیستمین دریاچة جهان است .برای رسیدن به این هدف در تحقیق جاری مراحل زیر به انجام رسیده است:مرحله اول :اطلاعات اخذ شده توسط ایستگاه های زمینی و داده های ماهواره های /Jason TOPEXدر طی سال های ۱۹۹۲ تا ۲۰۰۵ برای بررسی تغییرات ارتفاع سطح آب دریاچة ارومیه مورد استناد قرار گرفت .سپس، به منظور مقایسه، تصاویر چند طیفی ماهواره لندست) شامل :تصاویر سنجنده هایMSS ، TM ،(ETM +، MODISو IRS از سال ۱۹۷۶ الی ۲۰۰۵ میلادی با هدف ایجاد مدلهای تغییرات زمانی و مکانی آب دریاچه در محیط نرم افزار Imagine ERDAS پردازش گردید .در مرحله پیش - پردازش، با آماده نمودن داده های چند- زمانه ای، تصحیحات جوی انجام گرفت و به ترتیب با استفاده از نقاط کنترل زمینی کلیه تصاویر خام، زمین- مرجع و سپس تصحیحات ارتفاعی اعمال گردید.در مرحله پردازش،کلیه سریهای زمانی تصاویر ماهواره ای،به منظور استخراج محدوده های گسترش سطح آب طبقه بندی و خطوط ساحلی استخراج شدند
Text of Note
The study of fluctuations of the lake water levels is a subject that has attracted the attention of many researchers of different sciences particularly the climatologists and biologists in recent years. The main aim of this research is the study of Urmia Lake water level fluctuations as the largest interior lake of Iran and the 20th of the world. For doing so, the following steps have been taken: At first stage, the geo-information received from the ground stations and TOPEX/Jason satellite data during the years 1992 through 2005 have been utilized in order to estimate the water level changes in Urmia Lake. Afterwards, for a comparison of the multi-spectral satellite Landsat pictures (including pictures of MSS, TM. ETM+, MODIS and IRS). With the aim of the making spatial and temporal changes of sea level changes of this Lake from the year 1976 upto 2005 ERDAS Imagine software was used and the pictures were processed. At the pre-processing stage, with the provision of the multi-period baselines, the atmospheric corrections were done. Accordingly, using the ground control points all raw pictures were converted into ground-reference and also height corrections completed. At the processing stage Aiming the extraction of water level limits, all time series of the satellite pictures were classified and the coast lines were derived. The second stage: The climatic elements derived from various sources, using time series in SPSS and Minitab statistical packages, the seasonal differentiation went on by the conversion into the logarithmic form of (yt+1) = ln(yt+1) and the statistical standardization log(total standard deviation)/(yt-total mean) on raw climatic elements over these observations. Through the elimination of a 12 month succession, the data were normalized and stabilized. For finding an appropriate model of time series for dependent variable, i.e., water level of the Lake, we calculated the linear relation between each independent variable. The results indicated that there was an auto-regressive model at the 1st rank and a significant correlation between the changes of hydro-climatic elements and Urmia Lake water level fluctuations during the study period of 1970-2004. The final models and their results indicate an extensive periodical fluctuation and outstanding seasonal changes in the geometrical parameters of Urmia Lake, particularly during the last decade. The maximum changes have occurred alongside the eastern and southeastern coasts. Consequently, Islamic Island as the largest island in the Lake has been completely dried out. The appearance of such significant changes and fluctuations has resulted in a 23 reduction of the Urmia Lake levels during the study period which in turn has accelerated the conversion of the irrigable lands into barren lands and the deposition of saline minerals along the shorelines. Also in recent years, the extensive establishment of the dams over the main courses of the rivers it is predicable that the volume of the adjusted water for the operating dams (1241 million mcm3) and for the dams under the study for construction to reach to 1928 million m3 and totally to the magnitude of 3169 million m3. This has made drastic changes in the water levels along with the climatic droughts that have occurred in the area during the last decades.
TOPICAL NAME USED AS SUBJECT
Hydro-climate
Water Surface Fluctuations
Urmia Lake
PERSONAL NAME - PRIMARY RESPONSIBILITY
عباسیان،شیرزاد
PERSONAL NAME - SECONDARY RESPONSIBILITY
رسولی،علی اکبر، استاد راهنما
جهانبخش،سعید، استاد مشاور
زاهدی، مجید، استاد مشاور همکار
ELECTRONIC LOCATION AND ACCESS
Public note
سیاه و سفید
نمایه‌سازی قبلی
