Two reservoirs are connected by three clean cast-iron pipes in series, \(L_{1}=600 \mathrm{~m}, D_{1}=0.3 \mathrm{~m}, L_{2}=900 \mathrm{~m}, D_{2}=0.4 \mathrm{~m}\), \(L_{3}=1500 \mathrm{~m}\), and \(D_{3}=0.45 \mathrm{~m}\). When the discharge is \(0.11 \mathrm{~m}^{3} / \mathrm{s}\) of water at \(15^{\circ} \mathrm{C}\), determine the difference in elevation between the reservoirs.