Discharge and pressure head relationship for a given set of sprinkler irrigation system



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HYDRO Himanshu


DISCHARGE AND PRESSURE HEAD RELATIONSHIP
FOR A Given SET OF SPRINKLER IRRIGATION SYSTEM

H. J. PARMAR N. R. PATEL T. M. V. SURYANARAYANA


Ex-P. G. Student Teaching Assistant Assistant Professor

WATER RESOURCES ENGINEERING AND MANAGEMENT INSTITUTE


FACULTY OF TECHNOLOGY AND ENGINEERING
THE M. S. UNIVERSITY OF BARODA
SAMIALA, TA & DIST: VADODARA, GUJARAT, INDIA



ABSTRACT

The present study is carried out to determine the relationship between pressure head and discharge for a given set of sprinkler irrigation system. An experimental set of 12m x 12m grid of sprinklers is examined for the discharge and pressure head relationship for different pressures i.e. 0.50, 0.60, 0.65, 0.75, 0.90 and 0.92 kg/cm2. The relationship developed is non-linear. Minimum and maximum discharges observed are 2890 lph and 5162 lph observed at pressures 0.50 and 0.92 kg/cm2 respectively. It can be concluded that discharge is directly proportional to head loss raised to power m. The power m varies from 1.07 to 1.24 for a given set of 12m x 12m grid of sprinkler irrigation system.




KEYWORDS: Sprinkler irrigation; Discharge; Pressure head; Impact nozzle; Spray nozzle.



INTRODUCTION

A sprinkler irrigation system represents one of the most common types of irrigation systems. In many areas, the water and energy required for irrigation are scarce; hence, sprinkler irrigation systems must apply water with less energy consumption. This generally requires an improvement in the application of water (Martin-Benito et al. 1992). The improvement of irrigation water management is becoming critical to increase the efficiency of irrigation water use and to reduce irrigation water demands. The field evaluation of sprinkler irrigation systems is essentially required for standing the efficiency and performance of the system during operation.




METHODOLOGY

The area selected for the present study is The Training Cum Demonstration (TCD) farm of Water Resources Engineering and Management Institute (WREMI) which is located in Samiala, Vadodara District, Gujarat. The latitude is 73.120˚ N and longitude is 22.253˚ E. Water Resources Engineering and Management Institute, Faculty of Technology and Engineering, The M. S. University of Baroda is situated in Samiala over 5.5 ha area. Experimental plot details are presented in the Table 1 and also shown in Figure 1.





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