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تخمین غلظت کلروفیل آ در دریاچه سد اکباتان با استفاده از تصاویر سنجش از دور | ||
تحقیقات آب و خاک ایران | ||
مقاله 4، دوره 49، شماره 1، فروردین و اردیبهشت 1397، صفحه 39-50 اصل مقاله (1.12 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2018.208586.667472 | ||
نویسندگان | ||
عبدلله طاهری تیزرو1؛ محمد رضا سراجیان2؛ مریم قشقایی* 3؛ کیوان ویسی4 | ||
1استاد/ دانشگاه بوعلی سینا | ||
2استاد/ دانشگاه تهران | ||
3همدان/ دانشگاه بوعلی سینا | ||
4گروه مهندسی بهداشت دانشگاه علوم پزشکی ایلام | ||
چکیده | ||
پایش کیفی منابع آب و به ویژه مخازن سدها بسیار حیاتی میباشد اما نمونهبرداری از آب دریاچه پشت سدها بسیار وقتگیر، هزینهبر و همراه با مخاطرات متعدد است. تصاویر ماهوارهای و هوایی از آبهای سطحی را میتوان به عنوان ابزاری مفید جهت پایش پارامترهای کیفیت آب در پیکرههای آبی استفاده نمود. در این مطالعه امکان شناسایی و پایش غلظت کلروفیلa در مخزن سد اکباتان با استفاده از تصویر لندست 7 بررسی شد. به این منظور تبدیلات مختلفی روی بازتابش باندها اعمال شد و رابطه بین غلظت کلروفیل با بازتابش بررسی و استخراج شد. سپس بهترین مدل برای تخمین غلظت کلروفیلa انتخاب شد. نتایج مطالعه نشان داد رابطه بهدست آمده براساس نسبت باندها دقیقترین تخمین را از بین مدلهای به دست آمده ارائه میدهد. مقدار R2Adj برای این مدل برابر 91/0 و مقدار SE نیز معادل 04/0 به دست آمد. نتایج نشان میدهد که میتوان با استفاده از تصاویر لندست 7 غلظت کلروفیلa را با دقت قابل قبولی تخمین زد. | ||
کلیدواژهها | ||
تغذیهگرایی؛ کیفیت آب؛ لندست 7؛ مخزن سد | ||
مراجع | ||
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