TY - JOUR T1 - Developing Hydraulic Sensitivity Equations for Baffle Modules and Determining the Effects of Sensitivity Index Quantity Variations on Operating Conditions TT - تدوین معادلات حساسیت هیدرولیکی مدول‌های تیغه‌ای و بررسی اثر تغییرات کمّی شاخص حساسیت در شرایط بهره‌برداری‌ JF - JSTNAR JO - JSTNAR VL - 8 IS - 3 UR - http://jstnar.iut.ac.ir/article-1-326-en.html Y1 - 2004 SP - 121 EP - 137 KW - Off-take KW - Sensitivity analysis KW - Operation KW - Irrigation structure KW - Baffle module. N2 - The operation of an irrigation network is the result of a decision-making system in which three elements, i. e. the physical condition of the structures, control capacity, and hydraulic behavior of canal system, have important roles. The impact of these components is incorporated in the hydraulic sensitivity concept. For this purpose, the sensitivity of structures could be considered as the most important factor in the hydraulic characteristics of a system. The sensitivity analysis approach is one of the flow analysis methods that is used to forecast the flow behavior in several irrigation networks. Baffle Modules are one of the most suitable structures for flow regulating and delivery. In this paper, hydraulic sensitivity equations are presented for this type of structure. Also, the quantitative variations of the sensitivity index have been evaluated under operating conditions and compared with those of theoretical conditions. Then the influence of the sensitivity index variations on the performance of structures has been studied. This study was carried out on some modules of the Qazvin network. The results indicated that the hydraulic sensitivity of these off-takes varies under operating conditions. In some cases, variations were estimated to be more than 100%. The range of discharge variations was twice the predefined acceptable value (20%) in some offtakes. M3 ER -