A Study on Planned and Applied Irrigation Modules in Irrigation Networks: A Case Study at B&amp;#252;y&amp;#252;k Menderes Basin, Turkey

Cengiz Koç

doi:10.4236/cweee.2016.54011

Abstract

In this study, irrigation modules calculated in planning and actualized operational stage of the irrigation networks are examined. Irrigation module used irrigation networks is a constant discharge parameter, meeting the needs of irrigation water requirement smonthly of crops in one hectare of irrigation area and it is a constant discharge flowing continuously for a month. Extent of the overlapping between the irrigation planning module and the operation module actualized during the operational stage of the irrigation network depends on changes in the cropping patterns, differences in the effects of field irrigation methods used by farmers on the capacity of the constructed system, the increases or decreases in the water demands depending on the irrigation period, as well as the extent of sustainability according to the selected operation method. A2 irrigation area of Aydin plain irrigation network, locating in the Büyük Menderes basin, Turkey is selected as study area, with an area of 2500 ha. Irrigation planning module calculated for this network is q = 1.16 l/s/ha and it has been designed as per the supply demand operation method. For the study; actualized irrigation module in the operation stage has been compared with the planning irrigation module by using Excel software and taking parameters such as actual crop pattern and percentage distributions, actualized irrigated areas, irrigation networks and water distribution, water intake of irrigation networks which have been calculated without operation losses, as well as with 5%, 10%, and 15% operation losses. The July operation module calculated for the examined irrigation network generally conforms to the planning module, as it has received the values close to or below the value of irrigation planning modules.

Highlights

A well planned distribution network which has been turned into a project for irrigation purposes, should deliver the necessary amount of water needed within the desired timing, without causing problems to the operational and management requirements
Extent of the overlapping between the irrigation planning module and the operation module actualized during the operational stage of the irrigation network depends on changes in the cropping patterns, differences in the effects of field irrigation methods used by farmers on the capacity of the constructed system, the increases or decreases in the water demands depending on the irrigation period, as well as the extent of sustainability according to the selected operation method
There are no problems found in between the calculated irrigation module at the planning stage and the operational irrigation module calculated with the actual cropping patterns, the intake water taken into the channel without losses as well as the water intake with 5% and 10% operational losses

Summary

Introduction

A well planned distribution network which has been turned into a project for irrigation purposes, should deliver the necessary amount of water needed within the desired timing, without causing problems to the operational and management requirements. To examine the water source in detail and to acquire the necessary design parameters generally requires identifying the distribution areas of plants which are to be grown with plant density and to prepare the starting location of the networks. This case encompasses the required structure of the type, capacity, the size of main channels, regional conditions, the water level, flow control, as well the shape and size of the dominant area [1].

Material

Method

Study Data and Discussion

Conclusions and Recommendations