The preliminary hazard assessment relies upon empirical models to estimate the likelihood and volume of debris flows for selected basins in response to a design storm. Beginning in 2016, the empirical models are based upon historical debris-flow occurrence and magnitude data, rainfall storm conditions, terrain and soils information, and burn-severity data from recently burned areas (Staley et al., 2016, 2017). Hazard assessments for fires prior to May 2016 relied upon an earlier set of empirical methods described here .
3) Please update the reference list to the following:
Cannon, S.H., Gartner, J.E., Rupert, M.G., Michael, J.A., Rea, A.H., Parrett, C., 2010. Predicting the probability and volume of postwildfire debris flows in the intermountain western United States. Geological Society of America Bulletin, 122(1-2), 127-144. https://doi.org/10.1130/B26459.1
Gartner J.E., Cannon S.H., Santi P.M., 2014 Empirical models for predicting volumes of sediment deposited by debris flows and sediment-laden floods in the transverse ranges of southern California, Engineering Geology 176:45-56, doi:http://dx.doi.org/10.1016/j. enggeo.2014.04.008
Schwartz, G.E., and Alexander, R.B., 1995, Soils data for the conterminous United States derived from the NRCS State Soil Geographic (STATSGO) Database: U.S. Geological Survey Open-File Report 95–449, accessed July 2013, article https://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml.
Staley, D.M., Negri, J.A., Kean, J.W., Tillery, A.C., Youberg, A.M., 2016, Updated logistic regression equations for the calculation of post-fire debris-flow likelihood in the western United States: U.S. Geological Survey Open-File Report 2016-1106, 13 p., available at https://pubs.usgs.gov/of/2016/1106/
Staley, D.M., Negri, J.A., Kean, J.W., Laber, J.L., Tillery, A.C., Youberg, A.M., 2017. Prediction of spatially explicit rainfall intensity–duration thresholds for post-fire debris-flow generation in the western United States. Geomorphology, 278, 149-162. http://dx.doi.org/10.1016/j.geomorph.2016.10.019.
Verdin, K.L., Dupree, J.A., and Elliot, J.G., 2012, Probability and volume of potential postwildfire debris flows in the 2012 Waldo Canyon Burn Area near Colorado Springs, Colorado: U.S. Geological Survey Open-File Report 2012–1158, 8 p., at https://pubs.usgs.gov/of/2012/1158/.
A few changes for the scientific background page (https://landslides.usgs.gov/hazards/postfire_debrisflow/background2016.php)
1) Please update paragraph 1 to the following:
The preliminary hazard assessment relies upon empirical models to estimate the likelihood and volume of debris flows for selected basins in response to a design storm. Beginning in 2016, the empirical models are based upon historical debris-flow occurrence and magnitude data, rainfall storm conditions, terrain and soils information, and burn-severity data from recently burned areas (Staley et al., 2016, 2017). Hazard assessments for fires prior to May 2016 relied upon an earlier set of empirical methods described here .
Note that the word "here" (last word in last sentence) should link to https://landslides.usgs.gov/hazards/postfire_debrisflow/background2010.php
2) Please update the volume equation (Eq 3) on the scientific background page to the following:
ln(V) = 4.22 + (0.13 × sqrt(ElevRange)) + (0.36 × ln(HMkm)) + (0.39 × sqrt(i15))
3) Please update the reference list to the following:
Cannon, S.H., Gartner, J.E., Rupert, M.G., Michael, J.A., Rea, A.H., Parrett, C., 2010. Predicting the probability and volume of postwildfire debris flows in the intermountain western United States. Geological Society of America Bulletin, 122(1-2), 127-144. https://doi.org/10.1130/B26459.1
Gartner J.E., Cannon S.H., Santi P.M., 2014 Empirical models for predicting volumes of sediment deposited by debris flows and sediment-laden floods in the transverse ranges of southern California, Engineering Geology 176:45-56, doi:http://dx.doi.org/10.1016/j. enggeo.2014.04.008
Schwartz, G.E., and Alexander, R.B., 1995, Soils data for the conterminous United States derived from the NRCS State Soil Geographic (STATSGO) Database: U.S. Geological Survey Open-File Report 95–449, accessed July 2013, article https://water.usgs.gov/GIS/metadata/usgswrd/XML/ussoils.xml.
Staley, D.M., Negri, J.A., Kean, J.W., Tillery, A.C., Youberg, A.M., 2016, Updated logistic regression equations for the calculation of post-fire debris-flow likelihood in the western United States: U.S. Geological Survey Open-File Report 2016-1106, 13 p., available at https://pubs.usgs.gov/of/2016/1106/
Staley, D.M., Negri, J.A., Kean, J.W., Laber, J.L., Tillery, A.C., Youberg, A.M., 2017. Prediction of spatially explicit rainfall intensity–duration thresholds for post-fire debris-flow generation in the western United States. Geomorphology, 278, 149-162. http://dx.doi.org/10.1016/j.geomorph.2016.10.019.
Verdin, K.L., Dupree, J.A., and Elliot, J.G., 2012, Probability and volume of potential postwildfire debris flows in the 2012 Waldo Canyon Burn Area near Colorado Springs, Colorado: U.S. Geological Survey Open-File Report 2012–1158, 8 p., at https://pubs.usgs.gov/of/2012/1158/.
Thanks,
Dennis