نوع مقاله : پژوهشی
نویسندگان
1 گروه جغرافیای طبیعی، دانشکده علوم زمین، دانشگاه شهیدبهشتی، تهران، ایران
2 گروه جغرافیای طبیعی، دانشکده علوم زمین، دانشگاه شهیدبهشتی، تهران
چکیده
هدف این پژوهش، بررسی عوامل موثر بر تغییرات هیدرولوژی رودخانه طالقان‌رود پرداخته شده است. در این پژوهش از روش‌های توصیفی-تحلیلی استفاده شده است. مهم‌ترین داده‌های تحقیق شامل تصاویر ماهواره لندست 5 و 8، مدل رقومی ارتفاعی 30 متر SRTM، اطلاعات اقلیمی ایستگاه سینوپتیک طالقان و اطلاعات سه ایستگاه هیدرومتری منطقه بوده است. همچنین مهم‌ترین ابزارهای مورد استفاده در تحقیق ArcGIS، ENVI و SPSS بوده است. با توجه به موضوع مورد مطالعه، این تحقیق در چند مرحله انجام شده است که در مرحله اول به ارزیابی روند تغییرات کاربری اراضی، در مرحله دوم به ارزیابی تغییرات عناصر اقلیمی و در مرحله سوم با استفاده از شاخص‌های IHA به ارزیابی تغییرات هیدرولوژیکی رودخانه طالقان پرداخته شده است. نتایج این تحقیق نشان داده است که در طی سال‌های 1379 تا 1396، میانگین دمای منطقه دارای روند افزایشی و سطح پوشیده از برف منطقه دارای روند کاهشی بوده است. همچنین تحت تاثیر روند افزایشی جمعیت، کاربری نواحی انسان‌ساخت دارای روند افزایشی و کاربری باغات و مراتع دارای روند کاهشی بوده است. همچنین مجموع نتایج این تحقیق نشان داده است که تحت تاثیر تغییرات اقلیم و تغییرات کاربری اراضی، دبی رودخانه طالقان از نظر تمامی شاخص‌های IHA، دارای روند کاهشی معناداری بوده است. همچنین در بین ایستگاه‌های منطقه، ایستگاه گلینک که در پایین-دست سایر ایستگاه‌ها قرار دارد، با تغییرات بیش‌تری مواجه شده است.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
Determination of the hydrological changes of Taleghan River Based on IHA indices.
نویسندگان [English]
- Mahnaz Rezaei 1
- Somaiyeh Khaleghi 1
- Mohammad Mahdi Hosseinzadeh 2
1 Department of Physical Geography, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran
2 Department of Physical Geography, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran
چکیده [English]
Considering the importance of the subject, in this research, the factors affecting the hydrological changes of the Taleghan River have been investigated. Descriptive-analytical methods have been used in this research. The most important data of the research included Landsat 5 and 8 satellite images, the SRTM 30-meter height digital model, Taleghan synoptic station climate information, and regional discharge information. Also, the most important tools used in the research were ArcGIS, ENVI, and SPSS. According to the subject of the study, this research has been done in several stages. In the first stage, the evaluation of land use changes, in the second stage, the evaluation of changes in climatic elements, and in the third stage, using IHA indicators, has been paid to evaluate the hydrological changes of the Taleghan River. The results of this research have shown that during the years 2000-2017, the average temperature of the region has increased and the area covered by snow has decreased. Also, under the influence of population growth, the use of artificial areas has increased and the use of gardens and pastures has decreased. Also, the total results of this research have shown that the discharge of the Taleghan River under the influence of natural and human changes, in terms of all IHA indicators, has had a significant decreasing trend. Also, among the stations in the region, the Glink station, which is located downstream of other stations, has faced more changes, which can be considered as the result of human activities and climate changes.
کلیدواژه‌ها [English]
- Hydrological changes
- discharge
- land use
- IHA
- Taleghan River
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