# The Definition of Perennial Streams Based on a Wet Channel Network Extracted from LiDAR Data
## 2 Data and Methodology
\begin{table}
\begin{tabular}{c c c c c c c} \hline
**Watershed** & **USGS** & **Daniage Area** & **\(E_{p}/P\)** & **LiDAR** & **Streamflow (m\({}^{\prime}\)/s)** & **\(E_{0}\) (\%)** \\ \hline Tucca Creek, OR & 14303200 & 6.0 & 0.3 & 9 May 2010 & 0.481 \(\pm\) 0.11 & 28 \\ \hline Schafer Creek, OR & 14188610 & 5.5 & 0.4 & 9 October 2012 & 0.001 & 98 \\ \hline Chathathoachoe River, GA & 02330450 & 116.2 & 0.8 & 30 March 2010 & 4.474 & 27 \\ \hline Ward Creek, CA & 10336674 & 12.0 & 0.9 & 14 August 2010 & 0.074 & 54 \\ \hline Blue Springs Creek, AL & 02449882 & 31.4 & 0.9 & 26 February 2010 & 0.481 & 26 \\ \hline Cedar Creek, KY & 03297800 & 31.2 & 1.0 & 21 March 2009 & 0.136 & 51 \\ \hline Brier Creek, KY & 03302050 & 10.5 & 1.0 & 20 March 2009 & 0.037 & 47 \\ \hline Blackwood Creek, CA & 10336660 & 28.9 & 1.0 & 20 August 2010 & 0.103 \(\pm\) 0.01 & 73 \\  & & & & -21 June 2012 & 0.524 \(\pm\) 0.01 & 40 \\ \hline Ward Creek, CA & 10336676 & 24.9 & 1.0 & 14 August 2010 & 0.057 & 72 \\  & & & & -21 June 2012 & 0.27 \(\pm\) 0.01 & 43 \\ \hline South Fork Quantico Creek, VA & 01658500 & 19.4 & 1.0 & 7 April 2011 & 0.194 \(\pm\) 0.03 & 22 \\ \hline Middle Branch Chopawamsci Creek, VA & 0169500 & 11.4 & 1.1 & 7 April 2011 & 0.096 & 28 \\ \hline North Branch Chopawamsci Creek, VA & 0169000 & 15.0 & 1.1 & 7 April 2011 & 0.125 & 26 \\ \hline South Branch Chopawamsci Creek, VA & 01660000 & 6.5 & 1.1 & 6 April 2011 & 0.057 \(\pm\) 0.01 & 45 \\ \hline General Creek, CA & 10336645 & 19.2 & 1.1 & 20 August 2010 & 0.020 & 95 \\ \hline Allison Creek, SC & 021457492 & 104.0 & 1.1 & 12 March 2012 & 0.425 & 34 \\ \hline Wildcat Creek, SC & 021473428 & 76.6 & 1.1 & 8 March 2011 & 0.453 & 20 \\ \hline Pennington Creek, OK & 07331295 & 85.2 & 1.3 & 22 December 2009 & 0.580 \(\pm\) 0.04 & 28 \\ \hline Mill Creek, OK & 07331200 & 120.9 & 1.3 & 22 December 2009 & 0.255 & 26 \\ \hline Rock Creek, OK & 07329852 & 114.3 & 1.3 & 22 December 2009 & 0.651 & 33 \\ \hline Incline Creek, NV (Upstream) & 103366993 & 7.4 & 1.4 & 12 August 2010 & 0.040 & 74 \\ \hline North Crimer Creek, OK & 07328180 & 18.6 & 1.5 & 20 December 2009 & 0.006 & 67 \\ \hline Incline Creek, NV & 10336700 & 17.3 & 1.5 & 12 August 2010 & 0.099 & 66 \\ \hline Trout Creek, CA & 10336707 & 19.1 & 1.6 & 23 August 2010 & 0.156 & 54 \\ \hline Little Washita River, OK & 07327442 & 36.5 & 1.6 & 17 December 2009 & 0.071 & 41 \\ \hline Little Washita River, OK (Upstream) & 073274406 & 9.3 & 1.6 & 17 December 2009 & 0.015 & 45 \\ \hline Lake Creek, OK & 07325840 & 49.4 & 1.7 & 13 December 2009 & 0.176 & 18 \\ \hline Logan House Creek, NV & 10336740 & 5.3 & 1.9 & 16 August 2010 & 0.002 & 87 \\ \hline Glenbrook Creek, NV & 10336730 & 10.3 & 2.1 & 16 August 2010 & 0.005 & 88 \\ \hline Eagle Rock Creek, NV & 103367592 & 1.5 & 2.1 & 16 August 2010 & 0.014 & 75 \\  & & & & -17 August 2010 & 0.01 & 45 \\ \hline Pine Creek near Clamo, OR & 14046890 & 336.9 & 2.7 & 19 May 2011 & 0.368 & 7 \\ \hline \end{tabular}
\end{table} 
Table 1: United States Geological Survey (USGS) gage identification number, drainage area, climate aridity index, streamflow during the lidar survey, and its exceedance probability during the LiDAR surveys for the study watersheds. [\(E_{p}/P\): climate aridity index as the ratio of annual potential evaporation (\(E_{p}\)) to precipitation (\(P\)), \(E_{Q}\): exceedance probability of streamflow]. This study follows the methodology developed by [PERSON] et al. [28], which is a systematic method for wet channel network extraction by integrating LiDAR intensity with a digital elevation model (DEM). In this study, intensity maps and DEMs with 1-m spatial resolution were generated. This method was based on several major steps. First, densely vegetated areas in the intensity map were filtered out because the return intensity from the ground points under the canopy was typically low regardless of wetness, and their inclusion could lead to false positives.