In this study, the certain indicators such as water use, agricultural and economical efficiencies related to the 13 irigation scheme in the Region First of DSİ were calculated and the performance of each system were evaluated. The monthly net and total water supply ratios were considered as water use efficiency indicators. In this context, the monthly water supply ratios have been calculated by using the Penman-Monteith and Blaney-Criddie methods of May. June, July, August and September in which the watering reaches to the highest volume. According to the Penman-Monteith method total average water supply ratios for the months of May. June, july, August and September are calculated as 2.0, 0.7, 0.8, 0.8, 1.0 respectively and the net water supply lratios for the same months found as 3.9, 1.3, 1.5, 1.6, 1.0 respectively. As to Blaney-Criddie method total average water supply ratior for May, June, July, August and September are respectively 5.0, 0.7, 0.9, 0.8, 1.4 and net water supply lratios are 9.6, 1.4, 1.6, 1.6, 2.6 respectively. Total and net average water supply ratios are 1.7 and 0.9 respectively, the ratio of the agricultural efficiency indicators and the rate of return in consident payment of economic efficiency indicators were calculated respectively as 60 % and 80 %. On the other hand, the Nation wide average values are 2.0, 1.04, 66% and 36% respectively. Thus, it can be concluded that the first three values for the research area are approximately the same as the Nationwide values, but the latter is higher than the average value of the country.