نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه مهندسی آب، دانشگاه محقق اردبیلی، اردبیل، ایران

2 کارشناس ارشد گروه مهندسی آب، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

برای ارزیابی عملکرد بهره­برداری از شبکۀ آبیاری یامچی، حجم آب تحویل داده شده به واحدهای زراعی در دورۀ بهره­برداری سال­های 91-90 تا 94-93 و تغییرات سطح زیرکشت محصولات مختلف تهیه شد و پس از برآورد نیاز آبی محصولات با استفاده از روش پنمن-مانتیث-فائو، شاخص­هایی همچون تأمین نسبی منابع آب، تأمین نسبی آب آبیاری، نسبت حجم آب تحویلی و نسبت رطوبت قابل دسترس محاسبه شدند. نتایج بررسی­ها نشان می­دهد که شاخص تأمین نسبی آب آبیاری حدود 4/0 و 5/0 و شاخص تأمین نسبی منابع آب حدود 5/0 و 6/0 به­ترتیب در دو سال آخر دورۀ بهره­برداری بوده است که نشان می­دهد حدود 50 درصد کمتر از نیاز آبی محصولات، آب تحویل شبکه شده است. در طول دورۀ چهار سالۀ بهره­برداری، سهم بارندگی در تأمین نیاز آبی محصولات در دو ماه اول (اردیبهشت و خرداد) بیشتر از دو ماه انتهایی (تیر و مرداد) آن بود. ارزیابی عملکرد زمانی و مکانی تحویل و توزیع آب در شبکه با استفاده از تصویرهای ماهواره­ای و تفسیر آنها نشان می­دهد که در سال­های آخر بهره­برداری، سطحی وسیع از اراضی دچار خشکی شدید بوده است و نیز اینکه سطح زمین­های با تأمین کامل نیاز آبی کاهش یافته است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Spatio-Temporal Performance and Water Delivery Management of Yamchi Irrigation Network in Nam, W. H., Hong, E. M. and Choi, J. Y. 2016. Assessment of water delivery efficiency in irrigation canals using performance indicators. Irrig. Sci. 34, 129-143.Ardabil Province

نویسندگان [English]

  • Amin Kanooni 1
  • Armin Abedi 2

1 Water Engineering Department, Mohaghegh ardabili university, Ardabil, Iran

2 Water engineering department, Mohaghegh ardabili university

چکیده [English]

In order to evaluate the performance of Yamchi irrigation network located at the downstream of Ardabil reservoir dam, the necessary data with regards to water delivered to irrigated areas during four operating years (2012-2015) and cropping pattern variability of cultivated crops were acquired from Ardabil Regional Water Authority. Next water requirement of crops was estimated using Penman-Montith-FAO method and then performance of the irrigation network was evaluated by different performance indices  such as Relative water supply (RWS), Relative irrigation supply (RIS), Water delivery index (WDI) and Ratio of moisture availability. The results showed that the performance indices in last two years were 0.4 and 0.5 for RWS and 0.5 and 0.6 for RIS respectively. This indicates that water delivered to the crops through irrigation network was up to 50% less than their requirements. Rainfall contribution to crop water requirement in the first two months (May and June) was higher than the last two months (July and August) during the operating period. Delivery and distribution performance evaluation of network with respect to spatial and temporal scale using satellite images showed that the land area due to severe drought increased and that land area depended on irrigation water supply was decreased in the finishing years of project.

کلیدواژه‌ها [English]

  • Evaluation Indexes
  • performance
  • Remote Sensing
  • Yamchi Irrigation Network
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