Spatially and temporally distributed measurements of processes, such as baseflow at the
watershed scale, come at substantial equipment and personnel cost. Research presented
here focuses on building a crowdsourced database of inexpensive distributed stream stage
measurements. Signs on staff gauges encourage citizen scientists to voluntarily send
hydrologic measurements (eg, stream stage) via text message to a server that stores and
displays the data on the web. Based on the crowdsourced stream stage, we evaluate the …