واسنجی و اعتبار‌سنجی مدل WEAP در شبیه ‏سازی اثر تغییر سیستم ‏های آبیاری روی پاسخ هیدرولوژیک حوضۀ آبریز اهرچای

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی منابع آب، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه ارومیه

2 استادیار گروه مهندسی آب، پژوهشکدۀ مطالعات دریاچۀ ارومیه، دانشگاه ارومیه

3 استادیارگروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه ارومیه

چکیده


در این مطالعه کاربرد مدل WEAP (روش رطوبت خاک) برای شبیه‏سازی رفتار هیدرولوژیک در حوضۀ آبریز اهرچای بررسی شد. با توجه به توسعۀ سیستم‏های آبیاری تحت‏ فشار در این حوضه از سال 1384، دو مدل برای دو دورۀ قبل (1377‌ـ ۱۳۸۵) و بعد (۱۳۸۵‌ـ ۱۳۹۲) از توسعۀ سیستم‏های یادشده اجرا شد. روش آبیاری در مدل نخست، آبیاری سطحی و در مدل دوم آبیاری تحت ‏فشار و آبیاری سطحی بود. اطلاعات ایستگاه‏های هیدرومتری تازه‏کند (خروجی حوضه) و اورنگ (بالادست سد ستارخان)، در چهار سال نخست هر دوره برای واسنجی مدل و چهار سال دوم برای اعتبارسنجی مدل در نظر گرفته شد. مقادیر شاخص‏های آماری ضریب تعیین، نش-ساتکلیف و شاخص تطابق برای واسنجی مدل‏ نخست (1377 تا1380) در ایستگاه اورنگ به‌ترتیب برابر 95/0، 82/0 و 98/0 و در ایستگاه تازه‏کند به‌ترتیب برابر 96/0، 80/0 و 97/0 به‌دست آمد. مقادیر شاخص‏ها در واسنجی مدل دوم (1385‌ـ ۱۳۸۹) برای ایستگاه اورنگ برابر 95/0، 85/0 و 99/0 و برای ایستگاه تازه‏کند برابر 96/0، 83/0 و 98/0 تعیین شد. مقادیر شاخص‏ها در اعتبارسنجی مدل نخست (1381‌ـ 1385) برای ایستگاه اورنگ برابر 98/0، 88/0 و 99/0 و برای ایستگاه تازه‏کند برابر 96/0، 87/0 و 99/0 تعیین شد و در مدل دوم (1389‌ـ ۱۳۹۲) برای ایستگاه اورنگ برابر 96/0، 86/0 و 99/0 و برای ایستگاه تازه‏کند برابر 97/0، 78/0 و 97/0 به‌دست آمد.
 
 
 
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

WEAPModel Calibration and Validation in Simulating the Impact of Irrigation Systems Change on the Ahar-Chai Basin Hydrological Response

نویسندگان [English]

  • Maryam Mohamadpoor 1
  • Kamran Zeinalzade 2
  • Vahid Rezaverdineghad 3
  • Behzad Hesari 2
چکیده [English]

In this study, application ofWEAP model (soil moisture method) have been investigated for simulating hydrological behavior in Ahar-Chai basin. According to the development of pressurized irrigation systems in this basin, since 2005, two models were carried out for two periods, pre-pressurized period (1998-2006) and pressurized period (2006-2013). Irrigation method in first model was surface irrigation, and in second model weresurface and pressurized irrigation. Tazekand (the basin outlet point) and Orang (upstream of the Satarkhan dam) hydrometric stations data were considered for calibration (4 year) and validation (4 year) for both models.The coefficient of determination, Nash-Sutcliffe Efficiency (NSE) and the Index of Agreement were used as statistical indices for calibration and validation of both models. The calibration of the indices for first model (1998 to 2001) in Orang station were determined 0.95, 0.82 and 0.98 respectively, and in Tazekand station werecalculated 0.96, 0.80 and 0.97, respectively. The Calibration values ​​of the indices in the second model (2006 to 2010) in Orang station were determined 0.95, 0.85 and 0.99 respectively, and in Tazekand station were determined 0.96, 0.83 and 0.98 respectively. The validation values of indices for first model (2002 to 2006) in Orang station were determined 0.98, 0.88 and 0.99, respectively, and in Tazekand station were calculated 0.96, 0.87 and 0.99, respectively. The validation values ​​of the indices in the second model (2010 to 2013) in Orang station were determined 0.96, 0.86 and 0.99, respectively, and in Tazekand station were determined 0.97, 0.78 and 0.97, respectively.
 
 
 

کلیدواژه‌ها [English]

  • Ahar Chai basin
  • calibration
  • Irrigation systems changes
  • Soil moisture method
  • WEAP model
  • validation
 
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