Dear,

I would ask about the input data to WEAP should it be a monthly or annual data? I mean water demand and supply data.
Thank you for your help

Dear Mido, WEAP is able to simulate at timesteps as short as one day, or longer. In the "General-> Years and timesteps, is where the timestep of the model is set. Data, therefore can be (almost) any increment one day or longer.

Dear David,

Thank you for your help. Kindly, I have monthly inflow data into High Aswan Dam reservoir in Egypt, should I input this data in the local reservoir (inflow) OR input it in the river (headflow) OR surface water inflow?
By the way, I will connect the local reservoir with the river.
Thank you so much for opening the way to me
Kind regards