Many of those drainage areas were delineated by hand from old USGS quadrangles, which my not be representative of the current land surface. For each water right and stream gage location, the resulting database was a compilation of the total upstream drainage area, the mean annual precipitation and the average SCS curve number in the drainage area, as well as the flow length from the point to the outlet of the basin. Since the water rights are linked in the database, they can then be analyzed in the correct sequence by the model to obtain the naturalized flow at each water right from the corresponding flow at the appropriate stream gage. Aside from performing the same analysis for the rest of the basins in Texas, much of the future work associated with this project will focus on the use of the 30m DEM data sets. Currently, the files are much too large for use.
Smaller cells mean many more cells to cover the same area.
An effort has been made to perform some of the same procedures outlined above, but so far, the computers at CRWR have not been able to handle the files.