Calculated base-flow recession time constants at streamgages in the Niobrara National Scenic River in Nebraska, 2016-18
The base-flow recession time constant (tau) is a hydrologic index that characterizes the ability of a ground-water system to supply flow to a stream draining from that system. The magnitude of tau indicates the degree of hydraulic conductivity of the stream to the groundwater system.  Larger tau values indicate a …