Ky Low-Flow and Mean Annual Flow Data

<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This is a vector data set consisting of lines representing streams in Kentucky. Each line segment is attributed with the 7-day 2-year low-flow frequency values, 7-day 10-year low-flow frequency values, and the mean annual streamflow values for the downstream end of that stream segment. For example, the "7-day 2-year low-flow" is the flow rate, averaged over seven days, that has a 50% chance (i.e. one out of every two years) of being exceeded in any year; the 10-year value has a 10% chance of being exceeded in any year (i.e. one out of every ten years). Low-flow values were calculated using the equations in the USGS Water-Resources Investigations Report 91-4097 "Low-Flow Characteristics of Kentucky Streams". Mean annual streamflow values were calculated using the equation in the USGS Water-Resources Investigations Report 02-4206 "Estimating Mean Annual Streamflow of Rural Streams in Kentucky". Users of the data should be aware of the limitations and accuracy of the equations as explained in those reports and summarized below (see "Constraints on accessing and using the data").</SPAN></P></DIV></DIV></DIV>