I was wondering, when I put in a time series flow that changes over time. If I put in daily data (for instance day 1 = 0.5 m/s and day 2 = 1 m/s), does the program use 0.5 m/s for the entire day 1, or is it interpolated between day 1 and day 2. So, the flow data rises between hour 0 of day 1 from 0.5 until it reaches 1 m/s at day 2.

When you input the inflow time series as in your example (day 1 = 0.5 m3/s, day 2 = 1.0 m3/s) and you specify the output interval as 1 day, EFDC+ will use 0.5 m3/s for day 1 and 1.0 m3/s for day 2 in the calculation process.

However, if you want to use a shorter output interval, such as 1 hour, EFDC+ will interpolate between 0.5 and 1.0 m3/s for each hour during the calculation process.

If you need further assistance, please do not hesitate to let me know. Feel free to ask any questions you may have.