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بررسی تغییرات پهنههای آبی با استفاده از شاخصهای آبی و گوگل ارث انجین (مطالعۀ موردی: تالابهای شهرستان پلدختر، اﺳﺘﺎن لرستان) | ||
اکوهیدرولوژی | ||
مقاله 11، دوره 7، شماره 1، فروردین 1399، صفحه 131-146 اصل مقاله (1.76 M) | ||
نوع مقاله: پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ije.2020.295498.1265 | ||
نویسندگان | ||
رضا خسروی1؛ رضا حسن زاده* 2؛ مهدیه حسینجانی زاده2؛ صدیقه محمدی2 | ||
1دانشجوی کارشناسی ارشد سنجش از دور زمینشناختی، پژوهشگاه علوم و تکنولوژی پیشرفته و علوم محیطی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران | ||
2استادیار گروه اکولوژی، پژوهشگاه علوم و تکنولوژی پیشرفته و علوم محیطی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران | ||
چکیده | ||
زیستگاههای تالابی مهمترین اکوسیستمهای طبیعی کرۀ زمین هستند و نتایج بررسی تغییرات تالابها، یکی از نیازهای اساسی در مدیریت منابع طبیعی این زیستبومهای طبیعی است. هدف از انجام تحقیق حاضر، بررسی و مقایسۀ تغییرات تالابهای شهرستان پلدختر طی چهار دهۀ گذشته (1985تا 2018) با استفاده از تصاویر ماهوارهای لندست و کاربرد 7 شاخص پهنۀ آبی و گوگل ارث انجین است. این شاخصها شامل AWEInsh، AWEIsh، NDWI، MNDWI، NDWI plus VI، mNDWI plus VI، LSWI plus VI میشود و در گوگل ارث انجین از Landsat Water Product استفاده شده است. نتایج بهدستآمده جنبههای مختلفی از توزیع فضایی و زمانی پهنۀ آبی تالابها را در ۳3 سال اخیر ترسیم میکند. مرز پهنۀ آبی تالابها با استفاده از شاخصهای یادشده و سرویس گوگل ارث انجین استخراج شد و سپس، با دادههای واقعی محدودۀ تالابها مقایسه شدند. نتایج نشان میدهد شاخصهای AWEInsh و AWEIsh با صحت کلی 39/99 و 19/99 درصد و ضریب کاپای 94/0 و 91/0 بهترین شاخصها برای تعیین پهنۀ آبی هستند و اعتبارسنجی نتایج بهدستآمده از سرویس گوگل ارث انجین نشاندهندۀ 87 درصد صحت کلی و ضریب کاپای 86/0 است. این نتایج نشان میدهد شاخصهای آب و گوگل ارث انجین ابزاری مفید برای شناسایی روند افزایشی و کاهشی سطح آب تالابها هستند که میتوانند برنامهریزان و سیاستگذاران را در حفاظت و مدیریت منابع طبیعی در منطقۀ مطالعهشده یاری رسانند. | ||
کلیدواژهها | ||
آبهای سطحی؛ تالابهای پلدختر؛ تصاویر لندست؛ شاخص پهنههای آبی؛ Engine Google Earth | ||
عنوان مقاله [English] | ||
Investigating Water Body Changes Using Remote Sensing Water Indices and Google Earth Engine: Case Study of Poldokhtar Wetlands, Lorestan Province | ||
نویسندگان [English] | ||
Reza Khosravi1؛ Reza Hassanzadeh2؛ Mahdieh Hossinjanizadeh2؛ Sedigheh Mohammadi2 | ||
1.Sc Student of Geological remote sensing, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran | ||
2Assistant Professor, Ecology Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran | ||
چکیده [English] | ||
Wetlands are the most important natural ecosystems on the earth, and assessing changes in them is one of the essential necessities in the natural resource management of this valuable natural ecosystem. The aim of this study is to investigate water body changes using remote sensing water indices and Google Earth Engine (GEE) in the study area of Poldokhtar wetlands, Lorestan province. Remote sensing water indices includes AWEInsh, AWEIsh, NDWI, mNDWI, NDWI plus VI, mNDWI plus VI and LSWI plus VI that were used TM, ETM+ and OLI Landsat satellite images, and Google Earth Engine were applied Landsat Water Product data. The results demonstrated temporo-spatial distribution of water body changes in the study area and they were compared to real data indicating AWEIsh and AWEInsh with overall accuracy of 99.39 and 99.19 and Kappa coefficient of 0.94 and 0.91 were the best water indices among all in enhancing water bodies. Furthermore, GEE results showed overall accuracy of 87 and kappa Coefficient of 0.86. These results indicate that water indices and GEE are useful tools in detection of increasing and decreasing trends in water bodies that can assist planner and policy-makers in protecting and managing natural resources in the study area. | ||
کلیدواژهها [English] | ||
Water indices؛ Google earth engRemote sensing water indices, Google Earth Engine, Wetlands, Water body, Poldokhtar, Lorestanine؛ Wetlands؛ Poldokhtar | ||
مراجع | ||
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