New answers tagged hydrology
The first document that you should read is MOD16_global_evapotranspiration_description.pdf where is pointed out that the MOD16 global evapotranspiration (ET)/ latent heat flux (LE)/ potential ET (PET)/ potential LE (PLE) datasets are regular 1-km2 land surface ET datasets for the 109.03 Million km2 global vegetated land areas at 8-day, monthly and annual ...
The new Environment Agency API provides lat/lng for stations, though in England only: http://environment.data.gov.uk/flood-monitoring/doc/reference#stations
Depending on what you need the data for, the following links may or may not be helpful. You may find useful data from the National River Flow Archive (NRFA), part of the Centre for Ecology & Hydrology: http://www.ceh.ac.uk/data/nrfa/ As far as I can tell they do not have GIS formats available to download. This website, made by Shoothill, maps river ...
You should define the trace to be selected, rather than being drawn. That is through the analysis> analysis options> results menus of the Utility Network Analysis toolbar (see image). After that re-compute the trace, and export it regularly.
Have you considered "burning in" the main drainage channel? This is a process which is explained well in another thread here: How to 'burn' a stream network into a DEM layer in ArcGIS 10? It can help to account for common errors in elevation data (like bridges or roads crossing the river). It should force the flow in that area and produce a more ...
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