The available 55 years' weekly data are separated into two parts: (1) training and (2) testing. The data from 1951 to 1994 (2,340 time steps) are used for training and 1994–2004 (520 time steps) for testing. The nSDP training data consist of reservoir inflow q_t and tributary inflow in the previously mentioned period. The nRL training data consist of reservoir q_t and tributary inflow ⁠, and the two other flows q_1t and q_2t are used for hydropower calculation. The nSDP and nRL data for minimum and maximum levels, water supply, irrigation demands, ecological flow and hydropower are set to the 2005 weekly data presented in the case study section, and they are the same in the training and testing periods. The reservoir operation volume is discretized in 73 equal levels (300 × 10³ m³). The minimum level was set at 1,021.5 m amsl and the maximum level at 1,060 m amsl. The weights applied in these experiments are shown in Table 1. At the beginning, the nested optimization algorithm (linear or quadratic) and the number of clusters (in our case five) are selected in both nSDP and nRL. Both nSDP and nRL have the same experimental settings.