Verifying sea surface level of the Urmia Lake in Iran using satellite altimetry data

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 429

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شناسه ملی سند علمی:

ICINH01_297

تاریخ نمایه سازی: 5 بهمن 1395

چکیده مقاله:

Today, evaluation of instantaneous surface changes (ISS) and intermediate level (MSL) lakes is particularly important for the analysis of changes. Urmia Lake is the largest in Iranand the 20th largest worldwide, with an area of 4500-6000 km2. Due to indiscriminate extraction and use of water, and reduced volume of rainfall in recent years, there is much concern was lostfor the bulk of the lake. Hence, many studies in this field have been conducted to investigate thechanges in lake level. One of the more rigorous methods for this purpose uses data from satellite altimetry such as TOPEX/Poseidon, Jason-1 and Jason-2. However, this method has limitationsfor small lakes. In this paper, using 20 years of satellite data, the frequency of lake-level changesresulting from long-term impacts of climate change, pressure and wind effect is obtained by Fourier analysis. Among these frequencies, 5, 14 and 40 years can be noted. Then a sinusoidalvariation model is written for all three frequencies that can be adapted to moment level data andterrestrial station data. Maximum changes in the water level have been observed in the southeast and east coast of Urmia Lake, so this model shows changes moment the water level will be low in 2015, but back to the wet period in the years 2015 to 2030 was not unexpected.

کلیدواژه ها:

Satellite altimetry ، Fourier analysis ، Water level variation frequency ، Urmia Lake

نویسندگان

Saeed. A. P Heravi

M. Sc. Graduate Student, Department of Surveying and Geomatis Engineering, Islamic Azad University, Iran