آنالیز همبستگی پایۀ زمانی و تأخیر زمانی بین خشکسالی اقلیمی و خشکسالی آب‌شناختی دشت هشتگرد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی‌ارشد آبخیزداری دانشگاه تهران

2 استادیار، دانشکدة منابع طبیعی دانشگاه تهران

3 استاد دانشکدة منابع طبیعی دانشگاه تهران

چکیده

به منظور بررسی آثار زمانی خشکسالی اقلیمی بر خشکسالی آب‌شناختی در منابع آب زیرزمینی، تحقیق حاضر در دشت هشتگرد انجام شد. در این تحقیق، ابتدا SPI به عنوان نمایة خشکسالی اقلیمی استانداردشده و GRI به عنوان شاخص منابع آب زیرزمینی محاسبه شد. از آزمون من‌کندال برای بررسی وجود روند در داده‌ها استفاده شد. همبستگی پیرسون بین SPI و GRI از طریق همبستگی متقابل محاسبه شد. برای بررسی دقیق همبستگی، از پایه‌های زمانی 0 تا 200 ماهة SPI و هم تأخیر زمانی صفر تا 150 ماهه با GRI استفاده شد. در نهایت، مشخص شد که در ارتباط زمانی بین SPI و GRI علاوه‌بر وابستگی به پایة زمانی شاخص خشکسالی و تأخیر زمانی بین این دو شاخص، به ارتباط درونی بین تأخیر و پایة زمانی نیز وابسته است و الگوی رفتاری هر پیزومتر منجر به گروه‌بندی پیزومترها در سه گروه متفاوت شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Time and Lag Correlation Analysis between Climate Drought and Hydrological Drought in Hashtgerd Plain

نویسندگان [English]

  • Bahram Bakhtiare Enayat 1
  • Arash Malekian 2
  • Ali Salajegheh 3
1 Graduate Student, Watershed Management, University of Tehran
2 Assistant Professor, Faculty of Natural Resources, University of Tehran-Iran
3 Professor, Faculty of Natural Resources, University of Tehran-Iran
چکیده [English]

The aim followed in this research work was a study of effects the of temporal climatic drought on the hydrological drought, the study being carried out in Hashtgerd plain, karaj. Throughout the study the SPI (Standardized precipitation Index) for climatic drought and GRI for the hydrological drought were assessed. Mann-Kendall trend test was applied to assess data (rainfall and water level). Pearson correlation was determined through cross-correlation between SPI and GRI. For a detailed study of the correlation, the SPI time scales were calculated from 0 to 200 months and the monthly lag time from 0 to 150. The results indicated a high correlation related to interaction between SPI and the lag time with the GRI. Also, the behavior patterns of piezometers led to three groups of time actions within the study area.

کلیدواژه‌ها [English]

  • SPI
  • GRI
  • piezometer pattern
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