نوع مقاله : مطالعه موردی

نویسندگان

1 استادیار، گروه عمران، دانشکده مهندسی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 کارشناس ارشد، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

3 استادیار، گروه جغرافیای طبیعی، دانشکده علوم اجتماعی، دانشگاه محقق اردبیلی، اردبیل، ایران

4 دانشیار گروه منابع طبیعی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

تغییر کاربری اراضی خصوصاً در آبخیزهای شامل شهرها، به‌شدت بر ویژگی‌های آب سطحی تأثیر می‌گذارد. هدف از پژوهش حاضر، تعیین تغییرات کاربری اراضی در دوره 24 ساله و بررسی ارتباط پارامترهای کیفیت آب با تغییرات کاربری اراضی در حوضه سامیان اردبیل است. در این پژوهش ابتدا کاربری اراضی برای چهار دوره زمانی 1992 تا 2016 به‌وسیلۀ نرم‌افزار ENVI به‌دست آمد. تغییرات کیفی آب در پنج ایستگاه هیدرومتری و نه پارامتر کیفیت آب تجزیه و تحلیل شد. در مرحله بعد آزمون من-کندال برای بررسی روند تغییرات پارامترهای کیفی و آزمون پیرسون برای نشان دادن ارتباط بین پارامترهای کیفی و کاربری‌های اراضی استفاده شد. در سال‌های مورد مطالعه کاربری مرتع 75/9% کاهش، کاربری کشاورزی آبی 45/8% افزایش، کاربری مسکونی 42/1% افزایش و کشاورزی دیم نسبت به دوره اول 29/3% افزایش دارد. میانگین TDS و EC در دوره‌های مطالعاتی در ایستگاه‌های سامیان و گیلانده که در پایین‌دست شهر اردبیل قرار گرفته‌اند، افزایشی و بیش‌تر از ایستگاه‌های دیگر هستند. بررسی نتایج آزمون پیرسون جهت تعیین ارتباط بین داده‌های کیفی و کاربری اراضی نیز نشان می‌دهد که افزایش پارامترهای کیفی EC، Ca، Cl، SO4، Mg و Na رابطه معنی‌داری با افزایش کاربری‌های مسکونی، کشاورزی آبی و دیم دارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Land Use/Land Cover Changes in Samian Watershed, Ardabil, and its Relationship with the Quality of Surface Water Resources

نویسندگان [English]

  • Saeed Rasi Nezami 1
  • Hadi Izadifard 2
  • Hassan Khavarian 3
  • Raoof Mostafazadeh 4

1 Assist. Professor, Department of Civil Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

2 M.Sc., Department of Civil Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

3 Assist. Professor, Department of Natural Geography, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran

4 Assoc. Professor, Department of Natural Resources and member of Water Management Research Center, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran

چکیده [English]

Land use/land cover (LULC) change, strongly affects surface water characteristics, especially in urban watersheds. The aim of this study was to determine LULC in the Samian Watershed and assessing its relationship with water quality parameters. In this study, LULC maps was obtained by ENVI software in four periods (1992 to 2016). Then, 9 water quality parameters at five river gauge stations were selected for further analysis. The Mann-Kendall test was performed to examine the trends in water quality parameters and Pearson test was used to assess the correlation between quality parameters and land uses. According to the results, rangeland decreased by 9.75%, irrigated agriculture increased by 8.45%, residential increased by 1.42% and rainfed agriculture increased by 3.29% compared to the first period. Average of TDS and EC in the study periods in Samian and Gilandeh stations, has been increased. The correlation analysis using Pearson test between quality data and LULC also shows that the EC, Ca, Cl, SO4, Mg and Na pameters of had a significant relationship with increasing residential, irrigated and rainfed land uses.

کلیدواژه‌ها [English]

  • Mann-Kendall
  • Pearson
  • Remote Sensing
  • Trend
  • Urban Development
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