Evaluation of Hydraulic performance and operation of flow measurement structure of tertiery outlet in Garmsar Irrigation and drainage Network

During the recent years, the hydraulic performance of measurement devices
has been considered as an effective factor on flow behavior investigation in
irrigation networks. To reach this purpose, making more accurate measuring
structures and methods is important respectively. Management to optimize
water distribution and consumption in the networks plays an effective role in
improvement of irrigation efficiency. Therefore, it is necessary for hydraulic
structures to be the selected method, designed, constructed and operated in a
way to optimize the efficiency as well as perform an effective water
conveyance in to the fields. The Neyrpic-Modules are one of the important
measurement devices in the Garmsar irrigation network system. The
influence area of the irrigation network of Garmasar plain is about 89:::
Ha. In the present work, the hydraulic performance of some Neyrpic–
Modules which installed along the network canals were evaluated.
Moreover, in a state of variable upstream depth, the passed discharge was
measured. The error amount of Neyrpic-Gates, which operate with free
downstream levels, was determined and its discharge coefficient was
presented. In all tests, the theoretical and real discharges were compared to
ensure that the Neyrpic-Modules work efficiently. Finally, by using
collected data, all Neyrpic-Modules were calibrated.

Evaluation of Hydraulic performance and operation of flow measurement structure of tertiery outlet in Garmsar Irrigation and drainage Network Keywords:

Neyrpic-Module , Irrigation Network , Discharge Coefficient , Calibration