KMap
My research interests include landforms on the Earth's surface that are sculpted by flowing water in the form of rivers and glaciers and by wind and windborne particles. My work seeks to understand the intrinsic feedbacks between landforms on the Earth's surface and the fluid flow above the surface which creates these self-organized patterns. I focus on computer modeling and on the integration of model results with field and remote-sensing data.

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Courses
  • TBL
    The Beauty of Landscapes

  • NPAWTEGP
    National Parks: A Window Through Earth's Geological Processes

  • GLE
    Geomorphology and Landscape Evolution

  • ANMG
    Analytical and Numerical Modeling in Geosciences

  • FSG
    Field Studies in Geomorphology

  • G
    Geomorphology

  • GDS
    Geological Disasters and Society

  • ESP
    Earth Surface Processes

Grants
  • Funding agency logo
    Monitoring And Assessment Of Closure Design Performance at BHP sites

    Principal Investigator (PI)

    2018

    $1.2M
    Active
  • Funding agency logo
    Channel and Landscape Evolution as a Function of Spatial Scale in Semiarid Watersheds

    Principal Investigator (PI)

    2017

    $130.0K
  • Funding agency logo
    Characterizing Global Sand Flux for Martian Bedform Construction Times and Erosion Rates

    Co-Investigator (COI)

    2015

    $298.4K
  • Funding agency logo
    Quantifying Turbulent Shear Stress in "Real" Landscapes

    Principal Investigator (PI)

    2014

    $50.0K
  • Funding agency logo
    UAZDS-417 Hydrological Impacts of Fires Fueled by Invasive Buffelgrass

    Principal Investigator (PI)

    2014

    $33.1K
  • Funding agency logo
    Wind Over Rock: Quantifying the Feedbacks Among Wind Flow, Bedrock Erosion and Tectonic Uplift

    Principal Investigator (PI)

    2013

    $328.6K
  • Funding agency logo
    Development of a High-Resolution Global Soil Depth Dataset

    Principal Investigator (PI)

    2013

    $249.2K
  • Funding agency logo
    A workshop to assess and advance the prediction of land-surface response to climate and land use changes

    Principal Investigator (PI)

    2013

    $29.9K
  • Funding agency logo
    Collaborative Project: Development of Hybrid 3-D Hydrological Modeling for the NCAR Community Earth System Model (CESM)

    Co-Investigator (COI)

    2011

    $761.7K
News
  • Post-Wildfire Erosion Can Sculpt Forested Mountains

    2016

  • How Wind Sculpted the Earth’s Largest Dust Deposit

    2015

  • Video Highlights UA-Led Research on Human Evolution, Climate

    2015

  • Wind Can Keep Mountains From Growing

    2011

  • GeoDaze 2009 Features UA Student Research in the Earth Sciences

    2009

  • How Martian Winds Make Rocks Walk

    2009

  • UA Awarded $4.35M to Study Earth's Critical Zone

    2009

  • UA Team Evaluating Relationship Between Roadways, Restoration

    2009

  • Liquid Water Found Flowing on Mars? Not Yet

    2008

  • Biosphere 2 Hosts Fall Lecture Series

    2008

  • Predicting Where Flooding Will Occur in the West

    2005

  • Growth Secrets of Alaska's Mysterious Field of Lakes

    2005

  • Martian Mystery Explained

    2004

Publications (165)
Recent
  • How Hack distributions of rill networks contribute to nonlinear slope length--soil loss relationships

    2020

  • Controls on the hydraulic geometry of alluvial channels: bank stability to gravitational failure, the critical-flow hypothesis, and conservation of mass and energy

    2020

  • Resolving deep critical zone architecture in complex volcanic terrain

    2020

  • The Community Land Model version 5: Description of new features, benchmarking, and impact of forcing uncertainty

    2019

  • Hillslope hydrology in global change research and Earth system modeling

    2019

  • Earth surface modeling for education: How effective is it? Four semesters of classroom tests with WILSIM-GC

    2019

  • Controlled experiments of hillslope coevolution at the Biosphere 2 Landscape Evolution Observatory: Toward prediction of coupled hydrological, biogeochemical, and ecological change

    2018

  • A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage

    2018

  • Why Do Large‐Scale Land Surface Models Produce a Low Ratio of Transpiration to Evapotranspiration?

    2018

  • Which way do you lean? Using slope aspect variations to understand Critical Zone processes and feedbacks

    2018

  • Why do large-scale land surface models produce a low ratio of transpiration to evapotranspiration?

    2018

  • Controls on yardang development and morphology: 2. Numerical modeling

    2018

  • Signatures of obliquity and eccentricity in soil chronosequences

    2018

  • Controls on yardang development and morphology: 1. Field observations and measurements at Ocotillo Wells, California

    2018

  • A probabilistic approach to quantifying soil property change through time integration of energy and mass input

    2017

  • The Hominin Sites and Paleolakes Drilling Project: High-resolution paleoclimate records from the East African Rift System and their implications for understanding the environmental context of hominin evolution

    2017

  • A probabilistic approach to quantifying soil physical properties via time-integrated energy and mass input

    2017

  • Asymmetry of weathering-limited hillslopes: the importance of diurnal covariation in solar insolation and temperature

    2017

  • Coevolution of soil and topography across a semiarid cinder cone chronosequence

    2017

  • Geochemical evolution of the Critical Zone across variable time scales informs concentration-discharge relationships: Jemez River Basin Critical Zone Observatory

    2017

  • The Hominin Sites and Paleolakes Drilling Project: Acquiring High-Resolution Paleoclimate Records from the East African Rift System and Their Implications for Understanding the Environmental Context of Hominin Evolution

    2017

  • Quantifying the controls on potential soil production rates: a case study of the San Gabriel Mountains, California

    2017

  • Quantifying geomorphic change at ephemeral stream restoration sites using a coupled-model approach

    2017

  • CO2 diffusion into pore spaces limits weathering rate of an experimental basalt landscape

    2017

  • Topographic correlations with soil and regolith thickness from shallow-seismic refraction constraints across upland hillslopes in the Valles Caldera, New Mexico

    2016

  • A gridded global data set of soil, intact regolith, and sedimentary deposit thicknesses for regional and global land surface modeling

    2016

  • Understanding ecosystem services from a geosciences perspective

    2016

  • Advantages of computer simulation in enhancing students' learning about landform evolution: A case study using the grand canyon

    2016

  • Colloids and organic matter complexation control trace metal concentration-discharge relationships in Marshall Gulch stream waters

    2016

  • Constraining frequency--magnitude--area relationships for rainfall and flood discharges using radar-derived precipitation estimates: example applications in the Upper and Lower Colorado River basins, USA

    2016

  • Implementing and evaluating variable soil thickness in the Community Land Model, version 4.5 (CLM4. 5)

    2016

  • The predominance of post-wildfire erosion in the long-term denudation of the Valles Caldera, New Mexico

    2016

  • The influence of Holocene vegetation changes on topography and erosion rates: A case study at Walnut Gulch Experimental Watershed, Arizona

    2016

  • Self-affinity and surface-area-dependent fluctuations of lake-level time series

    2015

  • A gridded global data set of soil, immobile regolith, and sedimentary deposit thicknesses for regional and global land surface modeling

    2015

  • Geomorphic imprints of repeated tsunami waves in a coastal valley in northeastern Japan

    2015

  • Dynamics of sediment storage and release on aeolian dune slip faces: A field study in Jericoacoara, Brazil

    2015

  • Critical zone services: Expanding context, constraints, and curency beyond ecosystem services.

    2015

  • Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs

    2015

  • Controls on the large-scale spatial variations of dune field properties in the barchanoid portion of White Sands dune field, New Mexico

    2015

  • Predicting the roughness length of turbulent flows over landscapes with multi-scale microtopography

    2015

  • Laser vision: lidar as a transformative tool to advance critical zone science

    2015

  • Controls on valley spacing in landscapes subject to rapid base-level fall

    2015

  • Quantifying the time scale of elevated geomorphic response following wildfires using multi-temporal LiDAR data: An example from the Las Conchas fire, Jemez Mountains, New Mexico

    2015

  • Decadal-scale soil redistribution along hillslopes in the Mojave Desert

    2015

  • A hybrid-3D hillslope hydrological model for use in E arth system models

    2015

  • Constraining frequency-magnitude-area relationships for precipitation and flood discharges using radar-derived precipitation estimates: example applications in the Upper and Lower Colorado River Basins, USA.

    2015

  • The Landscape Evolution Observatory: A large-scale controllable infrastructure to study coupled Earth-surface processes

    2015

  • Quantifying topographic and vegetation effects on the transfer of energy and mass to the critical zone

    2015

  • An effective hyper-resolution pseudo-3D implementation of small scale hydrological features to improve regional and global climate studies

    2014

  • Multiscale bed form interactions and their implications for the abruptness and stability of the downwind dune field margin at White Sands, New Mexico, USA

    2014

  • FROM DUST TO DUST: QUATERNARY WIND EROSION OF THE MU US DESERT AND LOESS PLATEAU, CHINA

    2014

  • Controls on slope-wash erosion rates in the Mojave Desert

    2014

  • Martian Polar Stratigraphy from Stereo Topography

    2014

  • Critical Zone Services: Expanding Context, Constraints, and Currency beyond Ecosystem Services

    2014

  • The linkages among hillslope-vegetation changes, elevation, and the timing of late-Quaternary fluvial-system aggradation in the Mojave Desert revisited

    2014

  • Polar Stratigraphy from HiRISE Stereo Topography

    2014

  • Hillslope-scale experiment demonstrates the role of convergence during two-step saturation

    2014

  • Development of topographic asymmetry: Insights from dated cinder cones in the western United States

    2014

  • Simulating foreland basin response to mountain belt kinematics and climate change in the Eastern Cordillera and Subandes: An analysis of the Chaco foreland basin in southern Bolivia

    2014

  • An integrated modelling framework of catchment-scale ecohydrological processes: 2. The role of water subsidy by overland flow on vegetation dynamics in a semi-arid catchment

    2014

  • Incipient subsurface heterogeneity and its effect on overland flow generation--insight from a modeling study of the first experiment at the Biosphere 2 Landscape Evolution Observatory

    2014

  • Rare earth elements as reactive tracers of biogeochemical weathering in forested rhyolitic terrain

    2014

  • Controls on the geometry of potholes in bedrock channels

    2014

  • How do sediment yields from post-wildfire debris-laden flows depend on terrain slope, soil burn severity class, and drainage basin area? Insights from airborne-LiDAR change detection

    2014

  • Assessing Ability to Forecast Geomorphic System Responses to Climate and Land-Use Changes

    2014

  • Controls on the spacing and geometry of rill networks on hillslopes: Rain splash detachment, initial hillslope roughness, and the competition between fluvial and colluvial transport

    2013

  • Relationships between debris fan morphology and flow rheology for wet and dry flows on Earth and Mars: A numerical modeling investigation

    2013

  • Cosmogenic sup 3 /sup He age estimates of Plio-Pleistocene alluvial-fan surfaces in the Lower Colorado River Corridor, Arizona, USA

    2013

  • A robust, two-parameter method for the extraction of drainage networks from high-resolution digital elevation models (DEMs): Evaluation using synthetic and real-world DEMs

    2013

  • Autogenic cycles of channelized fluvial and sheet flow and their potential role in driving long-runout gravel progradation in sedimentary basins

    2013

  • Predicting the thickness and aeolian fraction of soils in upland watersheds of the Mojave Desert

    2013

  • Deviations from self-similarity in barchan form and flux: The case of the Salton Sea dunes, California

    2013

  • A spatially distributed model for the long-term suspended sediment discharge and delivery ratio of drainage basins

    2012

  • How do vegetation bands form in dry lands? Insights from numerical modeling and field studies in southern Nevada, USA

    2012

  • Analytic solution for the morphology of a soil-mantled valley undergoing steady headward growth: Validation using case studies in southeastern Arizona

    2012

  • Fluvial and slope-wash erosion of soil-mantled landscapes: detachment-or transport-limited?

    2012

  • Wind erosion in the Qaidam basin, central Asia: implications for tectonics, paleoclimate, and the source of the Loess Plateau

    2011

  • How water, carbon, and energy drive critical zone evolution: the Jemez-Santa Catalina Critical Zone Observatory

    2011

  • Calibration and testing of upland hillslope evolution models in a dated landscape: Banco Bonito, New Mexico

    2011

  • Late Holocene alluvial history of the Cuyama River, California, USA

    2011

  • An open system framework for integrating critical zone structure and function

    2011

  • Widespread hillslope gullying on the southeastern Tibetan Plateau: Human or climate-change induced?

    2011

  • The role of weathering in the formation of bedrock valleys on Earth and Mars: A numerical modeling investigation

    2011

  • Investigating gully flow emplacement mechanisms using apex slopes

    2010

  • How do pediments form?: A numerical modeling investigation with comparison to pediments in southern Arizona, USA

    2010

  • Numerical modeling of the late Cenozoic geomorphic evolution of Grand Canyon, Arizona

    2010

  • Modeling the formation of bright slope deposits associated with gullies in Hale Crater, Mars: Implications for recent liquid water

    2010

  • Controls of glacial valley spacing on earth and mars

    2010

  • Erratum to Controls of glacial valley spacing on Earth and Mars (Geomorphology 116 (2010) 189-201) (DOI:10.1016/j.geomorph.2009.10.018)

    2010

  • Relationships among climate, erosion, topography, and delamination in the Andes: A numerical modeling investigation

    2010

  • Minimizing the grid-resolution dependence of flow-routing algorithms for geomorphic applications

    2010

  • The effects of interdune vegetation changes on eolian dune field evolution: a numerical-modeling case study at Jockey's Ridge, North Carolina, USA

    2009

  • Quantifying the climatic and tectonic controls on hillslope steepness and erosion rate

    2009

  • An analysis of sinuous ridges in the southern Argyre Planitia, Mars using HiRISE and CTX images and MOLA data

    2009

  • Geomorphically based predictive mapping of soil thickness in upland watersheds

    2009

  • Wind-driven reorganization of coarse clasts on the surface of Mars

    2009

  • The hills are alive: Earth science in a controlled environment

    2009

  • Welcome to Lithosphere

    2009

  • Controls on the height and spacing of eolian ripples and transverse dunes: A numerical modeling investigation

    2009

  • Tectonic and structural control of fluvial channel morphology in metamorphic core complexes: The example of the Catalina-Rincon core complex, Arizona

    2009

  • The impact of snowmelt on the late Cenozoic landscape of the southern Rocky Mountains, USA

    2009

  • Geomorphology, complexity, and the emerging science of the Earth's surface

    2009

  • High Resolution Imaging Science Experiment (HiRISE) observations of glacial and periglacial morphologies in the circum-Argyre Planitia highlands, Mars

    2008

  • Crack propagation by differential insolation on desert surface clasts

    2008

  • Forward modeling of ice topography on Mars to infer basal shear stress conditions

    2008

  • Glacial erosion and mountain building

    2008

  • Evaluating suitability of a tephra dispersal model as part of a risk assessment framework

    2008

  • Quantitative modeling of earth surface processes

    2008

  • Recent bright gully deposits on Mars: Wet or dry flow?

    2008

  • Infiltration on alluvial fans in arid environments: Influence of fan morphology

    2008

  • Climate change triggered sedimentation and progressive tectonic uplift in a coupled piedmont--axial system: Cuyama Valley, California, USA

    2008

  • Dispersion of channel-sediment contaminants in distributary fluvial systems: Application to fluvial tephra and radionuclide redistribution following a potential volcanic eruption at Yucca Mountain

    2008

  • Desert pavement dynamics: numerical modeling and field-based calibration

    2007

  • Nonlinear slope-dependent sediment transport in cinder cone evolution

    2007

  • Relief threshold for eolian sand transport on alluvial fans

    2007

  • Erosion-rate determination from foreland basin geometry

    2007

  • Fractal behavior in space and time in a simplified model of fluvial landform evolution

    2007

  • Bedrock landscape development modeling: Calibration using field study, geochronology, and digital elevation model analysis

    2007

  • Cantor set model of eolian dust deposits on desert alluvial fan terraces

    2007

  • Numerical modeling of the Cenozoic geomorphic evolution of the southern Sierra Nevada, California

    2007

  • Evolution of the Bonneville shoreline scarp in west-central Utah: Comparison of scarp-analysis methods and implications for the diffusion model of hillslope evolution

    2006

  • Reply to comment by Kenneth Hinkel on Formation of oriented thaw lakes by thaw slumping

    2006

  • Latitudinal variation of denudation in the evolution of the Bolivian Andes

    2006

  • Sensitivity of playa windblown-dust emissions to climatic and anthropogenic change

    2006

  • Eocene to recent variations in erosion across the central Andean fold-thrust belt, northern Bolivia: Implications for plateau evolution

    2006

  • Formation of oriented thaw lakes by thaw slumping

    2005

  • Linking the scales of observation, process, and modeling of dust emissions

    2005

  • Deposition of playa windblown dust over geologic time scales

    2005

  • An integrated approach to flood hazard assessment on alluvial fans using numerical modeling, field mapping, and remote sensing

    2005

  • Mountains, monsoons, and megafans

    2005

  • Geomorphic control of radionuclide diffusion in desert soils

    2005

  • Correlation and dating of Quaternary alluvial-fan surfaces using scarp diffusion

    2004

  • Persistent drainage migration in a numerical landscape evolution model

    2004

  • Estimate of three-dimensional flexural-isostatic response to unloading: Rock uplift due to late Cenozoic glacial erosion in the western United States

    2004

  • The influence of piedmont deposition on the time scale of mountain-belt denudation

    2004

  • How do spiral troughs form on Mars?

    2004

  • Oscillations in arid alluvial-channel geometry

    2004

  • Coherence resonance and ice ages

    2003

  • Drainage basin evolution in the Rainfall Erosion Facility: dependence on initial conditions

    2003

  • Natural variability of atmospheric temperatures and geomagnetic intensity over a wide range of time scales

    2002

  • Spring-block models of seismicity: Review and analysis of a structurally heterogeneous model coupled to a viscous asthenosphere

    2000

  • Shapes of river networks and leaves: are they statistically similar?

    2000

  • Model assessments of the optimal design of nature reserves for maximizing species longevity

    2000

  • Are large complex ecosystems more unstable? A theoretical reassessment with predator switching

    2000

  • Statistical self-similarity of magmatism and volcanism

    1999

  • Species-Area Relation and Self-Similarity in a Biogeographical Model of Speciation and Extinction

    1999

  • Self-organization and scaling relationships of evolving river networks

    1999

  • Application of a Stochastic Deposition and Erosion Model to Reservoir Heterogeneity and Stratigraphic Data

    1999

  • Preface

    1999

  • Self-Affine Time Series: II. Applications and Models

    1999

  • Paleointensity variations of Earth's magnetic field and their relationship with polarity reversals

    1999

  • Networks with side branching in biology

    1998

  • The power spectral density of atmospheric temperature from time scales of 10- 2 to 106 yr

    1998

  • The power spectral density of atmospheric temperature from time scales of 10 sup -2 /sup to 10 sup 6 /sup yr

    1998

  • Kardar-Parisi-Zhang scaling of the height of the convective boundary layer and fractal structure of cumulus cloud fields

    1997

  • Synthetic stratigraphy with a stochastic diffusion model of fluvial sedimentation

    1997

  • Long-range persistence in climatological and hydrological time series: analysis, modeling and application to drought hazard assessment

    1997

  • Scale-invariance of soil moisture variability and its implications for the frequency-size distribution of landslides

    1997

  • Fractal models in Geology

    1997

  • Analysis and modeling of the natural variability of climate

    1997

  • Variations in solar luminosity from timescales of minutes to months

    1996

  • Scale-invariant topography and porosity variations in fluvial sedimentary basins

    1996

  • Molecular dynamics simulations of low-energy cluster deposition on metallic targets

    1992

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