I am looking to confirm if I used the correct methodology to estimate the demand input.
I found the list of cities in my study area and I was able to get the total population per LULC class. Then, I multiplied the average daily consumption by the total population found in each LULC class to get the total daily consumption. Lastly, I multiplied the values by 365 to find the yearly consumption in m³. One thing I am confused about is that InVEST asks for the demand to be reported in m³/(pixel · year).
Should I divide my yearly consumption value by a) the pixel count in each LULC, b) the total area of each LULC or some other way?