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اثر تغییر کاربری اراضی بر سطح آب زیرزمینی در دشتهای اصفهان-برخوار، نجفآباد و چادگان | ||
تحقیقات آب و خاک ایران | ||
مقاله 19، دوره 50، شماره 9، بهمن 1398، صفحه 2355-2371 اصل مقاله (2.2 M) | ||
نوع مقاله: یادداشت تحقیقاتی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2019.275564.668126 | ||
نویسندگان | ||
صدیقه غفاری کندری* 1؛ حمیدرضا مرادی2؛ رضا مدرس3 | ||
1دانش آموخته کارشناسی ارشد، رشته آبخیزداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس،تهران، ایران | ||
2دانشیار، گروه علوم و مهندسی آبخیزداری، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، تهران، ایران | ||
3استادیار، گروه علوم و مهندسی آبخیزداری، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، اصفهان، ایران | ||
چکیده | ||
در مطالعه حاضر، اثر تغییر کاربری اراضی بر سطح آب زیرزمینی دشتهای اصفهان-برخوار، نجفآباد و چادگان در دوره زمانی 25 سال (2015-1990) بررسی شد. بهمنظور تهیه نقشههای کاربری اراضی، ابتدا تصاویر ماهواره لندست مربوط به سالهای 1985، 1994، 2006 و 2015 دریافت و سپس الگوریتم نزدیکترین همسایه روش شیءگرا برای پردازش آنها بهکار برده شد. در ادامه نقشههای پهنهبندی سطح آب زیرزمینی در مقیاس سالانه با استفاده از روش کریجینگ تهیه شد. برای بررسی اختلاف بین دادههای پیزومتری دشتهای مورد مطالعه و بررسی اثر نوع کاربری اراضی بر ارتفاع آب زیرزمینی از آزمون تجزیه و تحلیل واریانس بهروش اندازهگیری مکرر استفاده شد. نتایج نشان داد در دو دشت اصفهان-برخوار و نجفآباد، میانگین ارتفاع آب زیرزمینی در کاربری مرتع در مقایسه با سایر کاربریها اختلاف معنیداری داشته است. همچنین بررسی ارتباط متقابل تغییر درصد مساحت کاربریهای اراضی و افت آب زیرزمینی نشان داد علیرغم کاهش کلی سطح اراضی زراعی در طول دوره مورد مطالعه در دو دشت اصفهان-برخوار و نجفآباد، سطح آب زیرزمینی در سالهای پایانی افت شدید داشته است. علاوه بر آن طبق نتایج بهدست آمده، افت آب زیرزمینی دشت چادگان در مقایسه با دو دشت دیگر بیشتر متأثر از افزایش سطح اراضی زراعی بوده است. | ||
کلیدواژهها | ||
تجزیه و تحلیل واریانس؛ چاه پیزومتری؛ روش کریجینگ؛ طبقهبندی شیءگرا؛ نقشه پهنهبندی | ||
عنوان مقاله [English] | ||
The impact of Land Use Change on Groundwater Level in Isfahan-Borkhar, Najafabad and Chadegan Plains | ||
نویسندگان [English] | ||
sedigheh ghafari1؛ Hamid Reza Moradi2؛ Reza Moddares3 | ||
1Graduated M.Sc. of Watershed Management Engineering, Faculty of Natural Resources and Marine Science, Tarbiat Modares University,Tehran, Iran. | ||
2Associated Professor, Department Watershed Management Engineering, Faculty of Natural Resources and Marine Science, Tarbiat Modares University, Tehran, Iran. | ||
3Assistant Professor, Department Watershed Management Engineering, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran | ||
چکیده [English] | ||
In the current study, the effect of land use change on groundwater level in Isfahan-Borkhar, Najafabad and Chadegan plains was investigated during 25-year period (1990-2015). To provide land use maps, firstly Landsat images of years; 1985, 1994, 2006 and 2015 were provided and then the nearest neighbor algorithm of object-oriented method was used for images processing. In addition, the zoning maps of groundwater level in annual scale were prepared using Kriging method. In order to investigate the differences of piezometric data among different plains and also the effect of land use types on groundwater level, the analysis of variance (ANOVA) test with repeated measure was used. The results showed that in Isfahan-Borkhar and Najafabad plains, the average groundwater level of rangelands had a significant difference with other land uses. In addition, investigating the interactive relationship of the land uses change percentages and the groundwater level decline showed a serious decrease in groundwater level of both Isfahan-Borkhar and Najafabad plains in the last years, in spite of reduction in agricultural land use during the study period. Furthermore, according to the obtained results, the groundwater level drawdown in Chadegan Plain as compared with two other plains was mainly affected by increasing agricultural lands. | ||
کلیدواژهها [English] | ||
Analysis of Variance, Kriging Method, Object-Oriented Classification, Piezometric Well, Zoning Map | ||
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