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:: Volume 4, Issue 11 (7-2010) ::
jwmseir 2010, 4(11): 13-24 Back to browse issues page
Development of Regression Equations for Estimating Transmission Losses in Ephemeral Rivers of Ghara-Ghoom Catchment
Sanaz Bambeichi , Said mahmood Hosseini * , Bijan Ghahreman
Abstract:   (15181 Views)

Flow in streams of arid and semi-arid regions is not perennial and usually floods occur after seasonal

precipitations. Therefore, the bed material is dry and underneath soil is in unsaturated condition prior to

occurrence of floods. As a result, volume of flood hydrographs decreases due to infiltration as they travel

downstream. This reduction in hydrograph volume is usually termed as transmission losses. Because of the

existence of ephemeral rivers in most parts of Iran, study on transmission losses in these areas is necessary.

In this paper, regression equations are developed for estimating transmission losses in ephemeral rivers of

Ghara-Ghoom catchment in Khorasan Razavi province. To achieve this, gauging stations' data and physical

characteristics of Kashafrud, Kardeh and Zoshk rivers were collected and analyzed. Transmission losses

in the first kilometer was considered as dependent variable in regression analysis and its dependency

was tested against upstream flow volume, flow duration, antecedent moisture content, hydraulic conductivity,

slope and width of the river as independent variables. Upstream flow volume was found to be the

most important variable in explaining transmission losses. Three regression equations (linear and nonlinear)

were developed for relating transmission losses to the most significant involved variables for Ghara-

Ghoom catchment. Estimates of transmission losses can be made for any unit length (km) by calculating

the flow volume at the beginning of the unit length as flow volume minus the transmission loss in the previous

unit length. Such equations can be used by water resources managers and hydraulic structure designers

Keywords: Transmission Losses, Ephemeral Rivers, Regression Equations, Ghara-Ghoom Catchment and Upstream Flow Volume.
Full-Text [PDF 539 kb]   (2463 Downloads)    
Type of Study: Research | Subject: Special
Received: 2013/02/26 | Accepted: 2014/05/25 | Published: 2014/05/25
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Bambeichi S, Hosseini S M, ghahreman B. Development of Regression Equations for Estimating Transmission Losses in Ephemeral Rivers of Ghara-Ghoom Catchment. jwmseir 2010; 4 (11) :13-24
URL: http://jwmsei.ir/article-1-143-en.html


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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 4, Issue 11 (7-2010) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
به اطلاع کلیه نویسندگان ، محققین و داوران  محترم  می رساند:

با عنایت به تصمیم  هیئت تحریریه مجله علمی پژوهشی علوم و مهندسی آبخیزداری فرمت تهیه مقاله به شکل پیوست در بخش راهنمای نویسندگان تغییر کرده است. در این راستا، از تاریخ ۱۴۰۳/۰۱/۲۱ کلیه مقالات ارسالی فقط در صورتی که طبق راهنمای نگارش جدید تنظیم شده باشد مورد بررسی قرار خواهد گرفت.
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