Program Officer, New Mexico Water Science Center
Anne Tillery has been a hydrologist in the Investigations section of the New Mexico Water Science Center since 2007. She holds a Master of Science in Earth and Planetary Science and a Bachelor of Science in Geology. She has 15 years of experience in surface water and geomorphic processes of the southwest. Her research focuses on the hydrology, hydraulics, and geomorphology of flooding in desert ephemeral channels and of debris flows following wildfires. She is currently the project chief for the Flood Analysis program in New Mexico. She conducts pre- and post- wildfire debris flow hazards assessments and documents postwildfire flooding and debris flows around New Mexico. Ms. Tillery has published studies related to postwildfire flooding and erosion, desert ephemeral-channel flow, and Holocene climate change impacts on desert geomorphology in addition to maps of stream networks and ground water levels.
Professional Experience
2007 - present: Hydrologist, U.S. Geological Survey, New Mexico Water Science Center
2006 - 2007: Senior Staff Geologist, William Lettis and Associates, Walnut Creek, CA
2003 - 2006: Geologist, URS Corporation, Albuquerque NM
1996 - 1999: Hydrologic technician, U.S. Geological Survey, Tempe Field Office, AZ
Education and Certifications
M.S. Earth and Planetary Science: University of New Mexico, May 2003
B.S. Geology: Arizona State University, May 1999, Magma Cum Laude
B.M. Instrumental Music: Arizona State University, May 1991, Cu
Science and Products
Implementing a Web-based Streamflow Statistics Tool for New Mexico (StreamStats)
Changes in Watershed Hydrologic Response Time with Post-wildfire Changes in Vegetation and Surface Fuels Along a Severely-burned, High-desert Canyon, Bandelier National Monument, NM
Prewildfire Assessments of Postwildfire Debris-Flow Hazards
Debris flows and Floods from Extreme Precipitation in September 2013, Gila National Forest, NM
Postwildfire Debris-Flow Hazards
Bandelier National Monument Postwildfire Flood Support
Floods Analysis
Analysis of the Magnitude and Frequency of Peak Discharge in the Navajo Nation and Surrounding Region, Arizona, Utah, Colorado, and New Mexico
A snapshot of stakeholder science needs related to drought in the Colorado River Basin
Attributions for nonstationary peak streamflow records across the conterminous United States, 1941-2015 and 1966-2015
Basin Characteristics and Stream Flow Data at Stream-gaged Locations in New Mexico and Surrounding Basins
Regression equations for estimating the 4-day, 3-year low-flow frequency and adjusted harmonic mean streamflow at ungaged sites for unregulated, perennial streams in New Mexico
Soils
Landscape change, fire and erosion
Presented abstracts from the U.S. Geological Survey 2020 Rocky Mountain Region Science Exchange (September 15–17, 2020)
Addressing stakeholder science needs for integrated drought science in the Colorado River Basin
Rocky Mountain Region Science Exchange 2020—EarthMAP and the Colorado River Basin
Controls on debris‐flow initiation on burned and unburned hillslopes during an exceptional rainstorm in southern New Mexico, USA
Estimating post-fire debris-flow hazards prior to wildfire using a statistical analysis of historical distributions of fire severity from remote sensing data
Effects of hillslope gully stabilization on erosion and sediment production in the Torreon Wash watershed, New Mexico, 2009–12
Prediction of spatially explicit rainfall intensity–duration thresholds for post-fire debris-flow generation in the western United States
Capturing spatiotemporal variation in wildfires for improving postwildfire debris-flow hazard assessments
Potential postwildfire debris-flow hazards—A prewildfire evaluation for the Jemez Mountains, north-central New Mexico
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
- Science
Implementing a Web-based Streamflow Statistics Tool for New Mexico (StreamStats)
Estimates of streamflow are needed for a wide variety of applications, including water-resources planning and management, flood-plain mapping, and instream flow determinations. Surface water is the primary source of water for irrigators along major stream corridors in New Mexico and is increasingly being utilized by large municipalities. While streamflow statistics for gaged sites are readily...Changes in Watershed Hydrologic Response Time with Post-wildfire Changes in Vegetation and Surface Fuels Along a Severely-burned, High-desert Canyon, Bandelier National Monument, NM
Flash flooding can be a destructive and life-threatening response of watersheds to intense rainfall events, particularly in sparsely vegetated, or burned watersheds. Studies have been conducted to estimate the magnitude of hydrologic responses of burned watersheds to rainfall events, however the time that it takes a flood to travel through a burned watershed and reach a critical or populated area...Prewildfire Assessments of Postwildfire Debris-Flow Hazards
Debris flows are high-density slurries of water, rock fragments, soil, and mud that can have enormous destructive power. Wildfire can drastically increase the probability of debris flows in landscapes that have otherwise been stable. In 2010, the USGS developed the Cannon model to estimate postwildfire debris-flow probabilities and volumes in burned areas. In 2013, with the help of U.S. Forest...Debris flows and Floods from Extreme Precipitation in September 2013, Gila National Forest, NM
A record-breaking rainstorm in Glenwood, New Mexico and the surrounding areas occurred in September, 2013 leading to widespread and destructive flooding and debris flows, including watersheds burned the previous year by the Whitewater-Baldy Complex wildfire. In the area of the Whitewater-Baldy burn scar, a highway was overtopped by flash flooding on Whitewater Creek. Many side canyon tributaries...Postwildfire Debris-Flow Hazards
Wildfire is a natural process in forest ecosystems, and occurs with varying frequencies and severities depending on landscape characteristics, climatic conditions, and the historical fire regime. Although attention often is focused on the potential damages from wildfire in the wildland-urban interface, wildfire also presents a threat to critical infrastructure including flood water conveyances and...Bandelier National Monument Postwildfire Flood Support
In the summer of 2011, the Las Conchas Fire burned 156,593 acres in the Jemez Mountains in northern NM including the upper watersheds of Frijoles and Capulin Canyons in Bandelier National Monument. The drastic removal of vegetation in the upper watersheds of these popular tourist destinations left them susceptible to dangerous and record breaking floods. As long as the threat of large post...Floods Analysis
Accurate estimations of flood discharges at bridge or culvert sites is required to provide cost-effective design of that structure. Streamflow-gaging stations, for which flood data are available, are usually located in major perennial drainage basins that are not representative of sites where common bridge and culvert designs are needed.In 1942, the USGS, in cooperation with the New Mexico...Analysis of the Magnitude and Frequency of Peak Discharge in the Navajo Nation and Surrounding Region, Arizona, Utah, Colorado, and New Mexico
Estimates of the magnitude and frequency of peak discharges on unregulated streams at gaging stations or ungaged stream sites in the Navajo Nation in Arizona, Utah, Colorado, and New Mexico are necessary for flood hazard mapping. - Data
A snapshot of stakeholder science needs related to drought in the Colorado River Basin
Stakeholder science needs were determined by reviewing more than 200 recently published literature items and web pages from Colorado River Basin (CRB) stakeholders. These stakeholder communications were used to characterize over 400 stakeholder science needs by reviewing their priorities, strategies, issues, missions, and concerns related to drought in the CRB. Members of the CRB Integrated SciencByArizona Water Science Center, California Water Science Center, Colorado Water Science Center, Fort Collins Science Center, Geology, Geophysics, and Geochemistry Science Center, Nevada Water Science Center, New Mexico Water Science Center, Southwest Biological Science Center, Utah Water Science Center, Wyoming-Montana Water Science Center, Colorado River Basin: Actionable and Strategic Integrated Science and TechnologyAttributions for nonstationary peak streamflow records across the conterminous United States, 1941-2015 and 1966-2015
The U.S. Geological Survey Dakota Water Science Center, in cooperation with the Federal Highway Administration, analyzed annual peak-flow data to determine if trends are present and provide attribution of trends where possible. Work for the national trend attributions for nonstationary annual peak-flow records was broken into seven regions that are loosely based off of two-digit hydrologic unit waBasin Characteristics and Stream Flow Data at Stream-gaged Locations in New Mexico and Surrounding Basins
The U.S. Geological Survey (USGS), in cooperation with the New Mexico Water Resources Research Institute (WRRI), identified basin characteristics and estimated mean annual streamflow for a regional study of 169 USGS surface-water streamgages throughout the state of New Mexico and adjacent states. The basin characteristics and mean annual streamflows presented here will be used to derive equations - Publications
Filter Total Items: 21
Regression equations for estimating the 4-day, 3-year low-flow frequency and adjusted harmonic mean streamflow at ungaged sites for unregulated, perennial streams in New Mexico
The Federal Clean Water Act stipulates that States adopt water-quality standards to protect and enhance the quality of water in those States and to protect water quality through the creation of planning documents and discharge permits. Critical low-flow values, including the 4-day, 3-year low-flow frequency (4Q3) and harmonic mean streamflows, are necessary for developing those planning documentsAuthorsMeghan T. Bell, Anne C. TillerySoils
Soils play a strong role in determining how New Mexico’s diverse landscapes will respond to climate change. Soil cover acts like a sponge, holding in water that falls as rain or snow. The presence of soil supports vegetation, and substantially reduces runoff and erosion. Soil enhances other processes such as infiltration of water and aquifer recharge. Soils can be damaged by a warming climate. LosAuthorsLeslie D. McFadden, Anne C. Tillery, Craig AllenLandscape change, fire and erosion
New Mexico has a dynamic landscape, which will become even more so in response to climate change over the next 50 years, in part because of increasing incidence of wildfire. As the climate changes to warmer conditions, less rainfall will infiltrate into aquifers, leading to increased overland runoff. Landform processes can be complex, but in general, the predicted changes in climate and precipitAuthorsAnne C. Tillery, Leslie D. McFadden, Craig AllenPresented abstracts from the U.S. Geological Survey 2020 Rocky Mountain Region Science Exchange (September 15–17, 2020)
The U.S. Geological Survey Rocky Mountain Region hosted scientists, managers, program coordinators, and leadership team members for a virtual Science Exchange during September 15–17, 2020. The Science Exchange had 216 registered participants and included 48 talks over the 3-day period. Invited speakers presented information about the novel U.S. Geological Survey Earth Monitoring, Analysis, and PreAddressing stakeholder science needs for integrated drought science in the Colorado River Basin
Stakeholders need scientific data, analysis, and predictions of how drought the will impact the Colorado River Basin in a format that is continuously updated, intuitive, and easily accessible. The Colorado River Basin Actionable and Strategic Integrated Science and Technology Pilot Project was formed to demonstrate the effectiveness of addressing complex problems through stakeholder involvement anAuthorsAnne C. Tillery, Sally House, Rebecca J. Frus, Sharon L. Qi, Daniel Jones, William J. AndrewsByEcosystems Mission Area, Water Resources Mission Area, Arizona Water Science Center, California Water Science Center, Colorado Water Science Center, Fort Collins Science Center, Geology, Geophysics, and Geochemistry Science Center, Nevada Water Science Center, New Mexico Water Science Center, Southwest Biological Science Center, Utah Water Science Center, Washington Water Science Center, Wyoming-Montana Water Science Center, Colorado River Basin: Actionable and Strategic Integrated Science and TechnologyRocky Mountain Region Science Exchange 2020—EarthMAP and the Colorado River Basin
The U.S. Geological Survey (USGS) Rocky Mountain Region (RMR) hosted USGS scientists, managers, program coordinators, and leadership team members for a virtual Science Exchange during September 15–17, 2020. The Science Exchange had 216 registered participants and included 48 talks over the 3-day period. Invited speakers presented information about the novel USGS Earth Monitoring, Analysis, and PreAuthorsAnne C. Tillery, Patrick J. Anderson, William J. Andrews, Katharine Dahm, Seth S. Haines, Robert Horton, David O'Leary, Ryan D. Taylor, Kathryn A. Thomas, Alicia TorregrosaByEcosystems Mission Area, Water Resources Mission Area, Fort Collins Science Center, Geology, Geophysics, and Geochemistry Science Center, New Mexico Water Science Center, Oklahoma-Texas Water Science Center, Southwest Biological Science Center, Utah Water Science Center, Western Geographic Science Center, Colorado River Basin: Actionable and Strategic Integrated Science and TechnologyControls on debris‐flow initiation on burned and unburned hillslopes during an exceptional rainstorm in southern New Mexico, USA
AbstractUsing observations from 688 debris flows, we analyse the hydrologic and landscape characteristics that influenced debris‐flow initiation mechanisms and locations in a watershed that had been partially burned by the 2012 Whitewater‐Baldy Complex Fire in the Gila Mountains, southern New Mexico. Debris flows can initiate due to different processes. Slopes can fail as discrete landslides and tAuthorsAnne C. Tillery, Francis K. RengersEstimating post-fire debris-flow hazards prior to wildfire using a statistical analysis of historical distributions of fire severity from remote sensing data
Following wildfire, mountainous areas of the western United States are susceptible to debris flow during intense rainfall. Convective storms that can generate debris flows in recently burned areas may occur during or immediately after the wildfire, leaving insufficient time for development and implementation of risk mitigation strategies. We present a method for estimating post-fire debris-flow haAuthorsDennis M. Staley, Anne C. Tillery, Jason W. Kean, Luke McGuire, Hannah Pauling, Francis K. Rengers, Joel B. SmithEffects of hillslope gully stabilization on erosion and sediment production in the Torreon Wash watershed, New Mexico, 2009–12
Sediment erosion and deposition in two sets of paired (treated and untreated) upland drainages in the Torreon Wash watershed, upper Rio Puerco Basin, New Mexico, were examined over a 3 1/2-year period from spring 2009 through fall 2012. The objective was to evaluate the effectiveness of shallow, loose-stone check dams, or “one-rock dams,” as a hillslope gully erosion stabilization and mitigation mAuthorsAnne Marie Matherne, Anne C. Tillery, Kyle R. Douglas-MankinPrediction of spatially explicit rainfall intensity–duration thresholds for post-fire debris-flow generation in the western United States
Early warning of post-fire debris-flow occurrence during intense rainfall has traditionally relied upon a library of regionally specific empirical rainfall intensity–duration thresholds. Development of this library and the calculation of rainfall intensity-duration thresholds often require several years of monitoring local rainfall and hydrologic response to rainstorms, a time-consuming approach wAuthorsDennis M. Staley, Jacquelyn Negri, Jason W. Kean, Jayme L. Laber, Anne C. Tillery, Ann M. YoubergCapturing spatiotemporal variation in wildfires for improving postwildfire debris-flow hazard assessments
Wildfires can increase the frequency and magnitude of catastrophic debris flows. Integrated, proactive natural hazard assessment would therefore characterize landscapes based on the potential for the occurrence and interactions of wildfires and postwildfire debris flows. This chapter presents a new modeling effort that can quantify the variability surrounding a key input to postwildfire debris-floAuthorsJessica R. Haas, Matthew P. Thompson, Anne C. Tillery, Joe H. ScottPotential postwildfire debris-flow hazards—A prewildfire evaluation for the Jemez Mountains, north-central New Mexico
Wildfire can substantially increase the probability of debris flows, a potentially hazardous and destructive form of mass wasting, in landscapes that have otherwise been stable throughout recent history. Although the exact location, extent, and severity of wildfire or subsequent rainfall intensity and duration cannot be known, probabilities of fire and debris‑flow occurrence for given locations caAuthorsAnne C. Tillery, Jessica R. HaasNon-USGS Publications**
James J. Guilinger, Andrew B. Gray, Nicolas C. Barth, Brandon T. Fong, The Evolution of Sediment Sources Over a Sequence of Postfire Sediment‐Laden Flows Revealed Through Repeat High‐Resolution Change Detection, Journal of Geophysical Research: Earth Surface, 10.1029/2020JF005527, 125, 10, (2020).Tillery, A.C., Sowers, J. M., and Pearce, S., 2006, Creek and Watershed Map of San Mateo and Vicinity, Oakland Museum of California, Oakland, CA, 1:25,800 scale.Tillery, A., Fawcett, P., McFadden, L., Scuderi, L., and McAuliffe, J., 2003, Late Holocene behavior of small drainage basins on the Colorado Plateau: influences of Lithology, Basin Form and Climate Change, in Geology of the Zuni Plateau: New Mexico Geological Society, p. 197-207.Fawcett, P., Tillery, A. and. Gutzler, D.S., 2001, Elevation dependence of the ENSO precipitation signal in the Southwest United States in Proceedings of the American Meteorological Society Symposium on Climate Variability, the Oceans, and Societal Impact, p. 235-236.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.