English: Each row of the graphic represents 2 years of data but is one year later than the one above it; this redundancy avoids arbitrary temporal divisions and allows us to see the 'dry' inter-year period as a whole. The US Geological Survey water year is October to September. Data are from USGS and US Army Corps of Engineers.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.