[Home ] [Archive]   [ فارسی ]  
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 13, Issue 45 (7-2019) ::
jwmseir 2019, 13(45): 77-86 Back to browse issues page
Comparison of the environmental flow assessment methods involving case studies of Karaj and Talar Rivers
Soghand Bayat MS, Kumars Ebrahimi Dr *, Shahab Araghinejad Dr, Yasi Mahdi Dr
University of Tehran,
Abstract:   (494 Views)
Environmental flow is explained as the period of time, quantity and the amount of required water for maintaining the water, fresh, the river’s ecosystem, human beings’ welfare and the life depending on the water. The main goal of this paper is to investigate and compare the hydrological methods including Tennant, aquatic flow, Tessman, analysis of the flow duration curve and the flow duration curve shifting (FDC shifting) in determining environmental flow of two rivers from two different prime basin of Iran, Karaj and Talar rivers with data of 59 and 63 years, respectively. According to the results, the flow duration curve shifting approach for its consideration to different ecological classes, attention to natural flow shifting and the efforts of maintaining this shifting in its own suggested environmental flows, has priority over other approaches and it is also more precise in comparing with others. Therefore, the environmental needs of Karaj and Talar rivers in the classification of environmental management C (the preservation of river’s least environmental condition) are assessed equal to 4.77 m3/s which is 38 percent of the average annual flow and 1.81 m3/s, equal to 24 percent of the average annual flow of each river, respectively.

 
Keywords: Environmental flow, hydrological method, FDC shifting, Karaj River, Talar river
Full-Text [PDF 856 kb]   (12 Downloads)    
Type of Study: Applicable | Subject: Special
Received: 2018/01/24 | Accepted: 2018/11/13 | Published: 2019/11/4
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Bayat S, Ebrahimi K, Araghinejad S, Mahdi Y. Comparison of the environmental flow assessment methods involving case studies of Karaj and Talar Rivers . jwmseir. 2019; 13 (45) :77-86
URL: http://jwmsei.ir/article-1-791-en.html


Volume 13, Issue 45 (7-2019) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
Persian site map - English site map - Created in 0.07 seconds with 32 queries by YEKTAWEB 3991