اثر تغییرات کاربری زمین بر تولید روان آب با استفاده از مدل وِتسپا در حوزه ی آب‌خیز فیروزکوه

نوع مقاله : پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی منابع طبیعی، بیابان زدایی، دانشگاه سمنان

2 دانشیار گروه بیابا ن زدایی، دانشکده ی کویرشناسی، دانشگاه سمنان

3 استادیار گروه بیابان زدایی، دانشکده ی کویرشناسی، دانشگاه سمنان

4 استادیار گروه مرتع و آبخیزداری، دانشکده ی منابع طبیعی، دانشگاه سمنان

چکیده

هدف اصلی این پژوهش ارزیابی اثرهای تغییر کاربری زمین بر شرایط آب شناسی حوزه ی آ بخیز فیروزکوه با استفاده از مدل توزیعی وِتسپا است. نقش هی کاربری زمین برای سا لهای 1378 و 1392 با استفاده از روش ترکیبی و تصاویر ماهواره ای لندست پنج و هفت تهیه شد. مدل سازی روان آب در مقیاس روزانه برای 8 سال ) 5 سال واسنجی و 3 سال اعتبارسنجی( با استفاده از مدل وتسپا برای نقشه های کاربری سا لهای 1378 و 1392 انجام شد. بررسی تغییر کاربری زمین نشان داد که تبدیل زمی نهای طبیعی به مناطق مسکونی و کشاورزی مهمترین تغییر در حوز هی آ بخیز فیروزکوه است. نتایج نشان داد که بر اثر تغییر در کاربری زمین از سال 1378 تا 1392 ، روان آب کل، روان آب سطحی و آ بدهی اوج افزایش یافته است. روان آب کل 14803 مترمکعب در سال 1378 و 15350 مترمکعب در کاربری زمین برای سال 1392 بوده است. نتایج نشان داد که بخش هایی از زمین های طبیعی حوزه ی آ بخیز فیروزکوه که تغییرات کاربری در آن روی داده در سا لهای گذشته به زمی نهای کشاورزی و مسکونی تبدیل شده، و این تغییرات موجب تغییر مؤلفه های روان آب یعنی حجم و آ بدهی اوج شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of Land Use Change on Runoff yield Using WetSpa Model in the Firoozkooh Watershed Basin

نویسندگان [English]

  • Maryam Abaszade 1
  • Mohammad Reza Yazdani 2
  • Ali Asghar Zolfaghari 3
  • Majid Mohammady 4
  • Ahmad Sadeghipour 3
1 Graduate (M.Sc.) Student, Desert Studies College, Semnan University, Semnan, Iran
2 Associate Professor, Desert Studies College, Semnan University, Semnan, Iran
3 Assistant Professor, Desert Studies College, Semnan University, Semnan, Iran
4 Assistant Professor, Natural Resources College, Semnan University, Semnan, Iran
چکیده [English]

The main objective of this research is investigating the effects of land use change on hydrological conditions in the Firoozkouh Watershed. Land use maps for the years 2000 and 2014 were prepared through a synthetic method using the Landsat 5 and 7 satellite imagery. Runoff simulation was carried out on a daily basis for 8 years (5 years for calibration and 3 years for validation) using the WetSpa model for land use in 2000 and 2014. Land use change showed that conversion of rangeland to farm fields and residential areas is the main change of land utilization in the Firoozkooh Watershed. Results showed that total runoff, surface runoff and peak discharge had increased following land use changes from 2000 to 2014. The total runoff in 2000 was 1480.22 m3h-1, and for the year 2014 it was 15350 m3h-1. Results showed that parts of the rangeland in the Firoozkooh Watershed, which had been converted to farmfields become agricultural and residential area during the past years had increased changed the runoff volume as well as peak discharge.

کلیدواژه‌ها [English]

  • Firoozkouh Watershed
  • Land use change
  • runoff
  • WetSpa model

مراجع

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فایل ها

سابقه مقاله

  • تاریخ دریافت: 22 بهمن 1396
  • تاریخ بازنگری: 20 اسفند 1396
  • تاریخ پذیرش: 20 اردیبهشت 1397

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