@article{sanchez_petrasova_skrip_collins_lawrimore_vogler_terando_vukomanovic_mitasova_meentemeyer_2023, title={Spatially interactive modeling of land change identifies location-specific adaptations most likely to lower future flood risk}, volume={13}, ISSN={["2045-2322"]}, url={http://dx.doi.org/10.1038/s41598-023-46195-9}, DOI={10.1038/s41598-023-46195-9}, abstractNote={AbstractImpacts of sea level rise will last for centuries; therefore, flood risk modeling must transition from identifying risky locations to assessing how populations can best cope. We present the first spatially interactive (i.e., what happens at one location affects another) land change model (FUTURES 3.0) that can probabilistically predict urban growth while simulating human migration and other responses to flooding, essentially depicting the geography of impact and response. Accounting for human migration reduced total amounts of projected developed land exposed to flooding by 2050 by 5%–24%, depending on flood hazard zone (50%–0.2% annual probability). We simulated various “what-if” scenarios and found managed retreat to be the only intervention with predicted exposure below baseline conditions. In the business-as-usual scenario, existing and future development must be either protected or abandoned to cope with future flooding. Our open framework can be applied to different regions and advances local to regional-scale efforts to evaluate potential risks and tradeoffs.}, number={1}, journal={SCIENTIFIC REPORTS}, publisher={Springer Science and Business Media LLC}, author={Sanchez, Georgina M. and Petrasova, Anna and Skrip, Megan M. and Collins, Elyssa L. and Lawrimore, Margaret A. and Vogler, John B. and Terando, Adam and Vukomanovic, Jelena and Mitasova, Helena and Meentemeyer, Ross K.}, year={2023}, month={Nov} }
 @article{vogler_vukomanovic_2021, title={Trends in United States Human Footprint Revealed by New Spatial Metrics of Urbanization and Per Capita Land Change}, volume={13}, ISSN={["2071-1050"]}, url={https://doi.org/10.3390/su132212852}, DOI={10.3390/su132212852}, abstractNote={Accelerations in population growth and urban expansion are transforming landscapes worldwide and represent a major sustainability challenge. In the United States, land conversion to impervious surfaces has outpaced population increases, yet there are few spatial metrics of urbanization and per capita land change available nationwide for assessing local to regional trends in human footprint. We quantified changes (2000–2010) in housing density, imperviousness, per capita land consumption, and land-use efficiency for block groups of the contiguous U.S. and examined national patterns and variation in these metrics along the urban–rural gradient and by megaregion. Growth in housing (+13.6%) and impervious development (+10.7%) resulted in losses of rural lands, primarily due to exurbanization and suburbanization. Mean per capita consumption increased in all density classes but was over 8.5 times greater in rural lands than in exurban, suburban, and urban areas. Urban and suburban areas had significantly lower mean consumption, yet change was unsustainable in 60% of these areas. Megaregions across the sprawling Sun Belt, spanning from Arizona to North Carolina, grew most unsustainably, especially compared to regions in the Pacific Northwest and Front Range. This work establishes 21st-century benchmarks that decision-makers can use to track local and regional per capita land change and sustainable growth in the U.S.; however, these metrics of the form, extent, rate, and efficiency of urbanization can be applied anywhere concurrent built-up area and population data are available over time. Our web mapping application allows anyone to explore spatial and temporal trends in human footprint and download metrics, and it is designed to be easily updatable with future releases of validated developed land cover, protected areas, and decennial Census data.}, number={22}, journal={SUSTAINABILITY}, publisher={MDPI AG}, author={Vogler, John B. and Vukomanovic, Jelena}, year={2021}, month={Nov} }
 @article{vukomanovic_vogler_petrasova_2019, title={Modeling the connection between viewscapes and home locations in a rapidly exurbanizing region}, volume={78}, ISSN={["1873-7587"]}, DOI={10.1016/j.compenvurbsys.2019.101388}, abstractNote={Low-density exurban development represents a unique form of landscape change motivated by aesthetics and individual choice, whether driven by perceptions of beauty or more broadly as worldviews expressed through outward appearance and actions. However, little is known about how individual preferences for new home sites manifest in landscape patterns of exurbanization. In this study, we examine the extent to which viewscapes - the visible part of a landscape that creates connection between people and their surroundings - drive patterns of development in the Sonoita Plain of Arizona. We mapped the locations of over 2,000 homes built before and after the Great Recession (~2010) and calculated line-of-sight viewscapes of each home with four metrics: viewscape area, privacy (number of visible neighbors), greenness (NDVI), and terrain ruggedness. We found that exurban homes have significantly larger and more private viewscapes compared to suburban homes and what would be expected by chance. After 2010, exurban homes were built at locations with yet larger and more private viewscapes even as settlement density increased. An autologistic model of post-2010 settlement patterns showed that viewscape privacy is positively associated with the probability of exurban development after accounting for road proximity and the area and greenness of viewscapes. Application of the predictive model was made possible through a new open-source algorithm that computes spatially continuous, all-possible vantage points (1.3M). Our algorithm allows planners to visualize wall-to-wall spatial patterns of viewscape drivers across a large region and more comprehensively consider the roles that viewscapes play in landscape change.}, journal={COMPUTERS ENVIRONMENT AND URBAN SYSTEMS}, author={Vukomanovic, Jelena and Vogler, John B. and Petrasova, Anna}, year={2019}, month={Nov} }
 @article{berkel_shashidharan_mordecai_vatsavai_petrasova_petras_mitasova_vogler_meentemeyer_2019, title={Projecting Urbanization and Landscape Change at Large Scale Using the FUTURES Model}, volume={8}, url={http://dx.doi.org/10.3390/land8100144}, DOI={10.3390/land8100144}, abstractNote={Increasing population and rural to urban migration are accelerating urbanization globally, permanently transforming natural systems over large extents. Modelling landscape change over large regions, however, presents particular challenges due to local-scale variations in social and environmental factors that drive land change. We simulated urban development across the South Atlantic States (SAS), a region experiencing rapid population growth and urbanization, using FUTURES—an open source land change model that uses demand for development, local development suitability factors, and a stochastic patch growing algorithm for projecting alternative futures of urban form and landscape change. New advances to the FUTURES modelling framework allow for high resolution projections over large spatial extents by leveraging parallel computing. We simulated the adoption of different urban growth strategies that encourage settlement densification in the SAS as alternatives to the region’s increasing sprawl. Evaluation of projected patterns indicate a 15% increase in urban lands by 2050 given a status quo development scenario compared to a 14.8% increase for the Infill strategy. Status quo development resulted in a 3.72% loss of total forests, 2.97% loss of highly suitable agricultural land, and 3.69% loss of ecologically significant lands. An alternative Infill scenario resulted in similar losses of total forest (3.62%) and ecologically significant lands (3.63%) yet consumed less agricultural lands (1.23% loss). Moreover, infill development patterns differed qualitatively from the status quo and resulted in less fragmentation of the landscape.}, number={10}, journal={Land}, publisher={MDPI AG}, author={Berkel, Derek Van and Shashidharan, Ashwin and Mordecai, Rua and Vatsavai, Raju and Petrasova, Anna and Petras, Vaclav and Mitasova, Helena and Vogler, John and Meentemeyer, Ross K.}, year={2019}, month={Sep}, pages={144} }
 @article{vukomanovic_singh_petrasova_vogler_2018, title={Not seeing the forest for the trees: Modeling exurban viewscapes with LiDAR}, volume={170}, ISSN={["1872-6062"]}, DOI={10.1016/j.landurbplan.2017.10.010}, abstractNote={Viewscapes are the visible portions of a landscape that create a visual connection between a human observer and their 3-dimensional surroundings. However, most large area line-of-sight studies have modeled viewscapes using bare-earth digital elevation models, which exclude the 3-D elements of built and natural environments needed to comprehensively understand the scale, complexity and naturalness of an area. In this study, we compared viewscapes derived from LiDAR bare earth (BE) and top-of-canopy (ToC) surface models for 1000 exurban homes in a region of the Rocky Mountains, USA that is experiencing rapid low-density growth. We examined the extent to which the vertical structure of trees and neighboring houses in ToC models – not accounted for in BE models – affect the size and quality of each home's viewscape. ToC models consistently produced significantly smaller viewscapes compared to BE models across five resolutions of LiDAR-derived models (1, 5, 10, 15, and 30-m). As resolution increased, both ToC and BE models produced increasingly larger, exaggerated viewscapes. Due to their exaggerated size, BE models overestimated the greenness and diversity of vegetation types in viewscapes and underestimated ruggedness of surrounding terrain compared to more realistic ToC models. Finally, ToC models also resulted in more private viewscapes, with exurban residents seeing almost three times fewer neighbors compared to BE models. These findings demonstrate that viewscape studies should consider both vertical and horizontal dimensions of built and natural environments in landscape and urban planning applications.}, journal={LANDSCAPE AND URBAN PLANNING}, author={Vukomanovic, Jelena and Singh, Kunwar K. and Petrasova, Anna and Vogler, John B.}, year={2018}, month={Feb}, pages={169–176} }
 @article{singh_chen_vogler_meentemeyer_2016, title={When Big Data are Too Much: Effects of LiDAR Returns and Point Density on Estimation of Forest Biomass}, volume={9}, ISSN={["2151-1535"]}, DOI={10.1109/jstars.2016.2522960}, abstractNote={Analysis of light detection and ranging (LiDAR) data is becoming a mainstream approach to mapping forest biomass and carbon stocks across heterogeneous landscapes. However, large volumes of multireturn high point-density LiDAR data continue to pose challenges for large-area assessments. We are beginning to learn when and where point density can be reduced (or aggregated), but little is known regarding the degree to which multireturn data-at varying levels of point density-improve estimates of forest biomass. In this study, we examined the combined effects of LiDAR returns and data reduction on field-measured estimates of aboveground forest biomass in deciduous and mixed evergreen forests in an urbanized region of North Carolina, USA. We extracted structural metrics using first returns only, all returns, and rarely used laser pulse first returns from reduced point densities of LiDAR data. We statistically analyzed relationships between the field-measured biomass and LiDAR-derived variables for each return type and point-density combination. Overall, models using first return data performed only slightly better than models that utilized multiple returns. First-return models and multiple-return models at one percent point density resulted in 14% and 11% decrease in the amount of explained variation, respectively, compared to models with 100% point density. In addition, variance of modeled biomass across all point densities and return models was statistically similar to the field-measured biomass. Taken together, these results suggest that LiDAR first returns at reduced point density provide sufficient data for mapping urban forest biomass and may be an effective alternative to multireturn data.}, number={7}, journal={IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING}, author={Singh, Kunwar K. and Chen, Gang and Vogler, John B. and Meentemeyer, Ross K.}, year={2016}, month={Jul}, pages={3210–3218} }
 @article{meentemeyer_dorning_vogler_schmidt_garbelotto_2015, title={Citizen science helps predict risk of emerging infectious disease}, volume={13}, ISSN={["1540-9309"]}, DOI={10.1890/140299}, abstractNote={Engaging citizen scientists is becoming an increasingly popular technique for collecting large amounts of ecological data while also creating an avenue for outreach and public support for research. Here we describe a unique study, in which citizen scientists played a key role in the spatial prediction of an emerging infectious disease. The yearly citizen‐science program called “Sudden Oak Death (SOD) Blitz” engages and educates volunteers in detecting the causal pathogen during peak windows of seasonal disease expression. We used these data – many of which were collected from under‐sampled urban ecosystems – to develop predictive maps of disease risk and to inform stakeholders on where they should prioritize management efforts. We found that continuing the SOD Blitz program over 6 consecutive years improved our understanding of disease dynamics and increased the accuracy of our predictive models. We also found that self‐identified non‐professionals were just as capable of detecting the disease as were professionals. Our results indicate that using long‐term citizen‐science data to predict the risk of emerging infectious plant diseases in urban ecosystems holds substantial promise.}, number={4}, journal={FRONTIERS IN ECOLOGY AND THE ENVIRONMENT}, author={Meentemeyer, Ross K. and Dorning, Monica A. and Vogler, John B. and Schmidt, Douglas and Garbelotto, Matteo}, year={2015}, month={May}, pages={189–194} }
 @inbook{fox_vogler_sen_ziegler_giambelluca_2014, title={Regional Scenarios and Simulated Land‐Cover Changes in Montane Mainland Southeast Asia}, url={http://dx.doi.org/10.1002/9781118854945.ch8}, DOI={10.1002/9781118854945.ch8}, abstractNote={We used the Conversion of Land Use and its Effects (CLUE-s) model to simulate scenarios of land-cover and land-use change (LCLUC) in Montane Mainland Southeast Asia (MMSEA), a region on the cusp of change due to projected rapid intensification of agriculture and expansion of regional trade markets. Simulated changes affected approximately 10% of the MMSEA landscape between 2001 and 2025 and 16% between 2001 and 2050. Roughly 9% of the current vegetation, which consists of native species of trees, shrubs, and grasses, is predicted to be replaced by tree plantations, tea, and other evergreen shrubs during the 50-year period. Importantly, 4% of this change would be due to the expansion of rubber, a tree plantation crop that may have important implications for local-to-regional scale hydrology because of its relatively high water use for leaf flushing during the driest part of the year.}, booktitle={Vulnerability of Land Systems in Asia}, author={Fox, Jefferson and Vogler, John B. and Sen, Omer L. and Ziegler, Alan L. and Giambelluca, Thomas W.}, year={2014}, month={Dec} }
 @article{dillon_meentemeyer_vogler_cobb_metz_rizzo_2013, title={Range-Wide Threats to a Foundation Tree Species from Disturbance Interactions}, volume={60}, url={http://dx.doi.org/10.3120/0024-9637-60.2.139}, DOI={10.3120/0024-9637-60.2.139}, abstractNote={Abstract The geographic range of tanoak, Notholithocarpus densiflorus (Hook. & Arn.) Manos, Cannon & S. H. Oh (Fagaceae), encompasses tremendous physiographic variability, diverse plant communities, and complex disturbance regimes (e.g., development, timber harvest, and wildfire) that now also include serious threats posed by the invasive forest pathogen Phytophthora ramorum S. Werres, A.W.A.M. de Cock. Knowing where these disturbance factors interact is critical for developing comprehensive strategies for conserving the abundance, structure, and function of at-risk tanoak communities. In this study, we present a rule-based spatial model of the range-wide threat to tanoak populations from four disturbance factors that were parameterized to encode their additive effects and two-way interactions. Within a GIS, we mapped threats posed by silvicultural activities; disease caused by P. ramorum; human development; and altered fire regimes across the geographic range of tanoak, and we integrated spatially coinciding disturbances to quantify and map the additive and interacting threats to tanoak. We classified the majority of tanoak's range at low risk (3.7 million ha) from disturbance interactions, with smaller areas at intermediate (222,795 ha), and high (10,905 ha) risk. Elevated risk levels resulted from the interaction of disease and silviculture factors over small extents in northern California and southwest Oregon that included parts of Hoopa and Yurok tribal lands. Our results illustrate tanoak populations at risk from these interacting disturbances based on one set of hypothesized relationships. The model can be extended to other species affected by these factors, used as a guide for future research, and is a point of departure for developing a comprehensive understanding of threats to tanoak populations. Identifying the geographic location of disturbance interactions and risks to foundation species such as tanoak is critical for prioritizing and targeting conservation treatments with limited resources.}, number={2}, journal={Madroño}, author={Dillon, Whalen W. and Meentemeyer, Ross K. and Vogler, John B. and Cobb, Richard C. and Metz, Margaret R. and Rizzo, David M.}, year={2013}, month={Apr}, pages={139–150} }
 @article{meentemeyer_tang_dorning_vogler_cunniffe_shoemaker_2013, title={FUTURES: Multilevel Simulations of Emerging Urban-Rural Landscape Structure Using a Stochastic Patch-Growing Algorithm}, volume={103}, ISSN={["1467-8306"]}, DOI={10.1080/00045608.2012.707591}, abstractNote={We present a multilevel modeling framework for simulating the emergence of landscape spatial structure in urbanizing regions using a combination of field-based and object-based representations of land change. The FUTure Urban-Regional Environment Simulation (FUTURES) produces regional projections of landscape patterns using coupled submodels that integrate nonstationary drivers of land change: per capita demand, site suitability, and the spatial structure of conversion events. Patches of land change events are simulated as discrete spatial objects using a stochastic region-growing algorithm that aggregates cell-level transitions based on empirical estimation of parameters that control the size, shape, and dispersion of patch growth. At each time step, newly constructed patches reciprocally influence further growth, which agglomerates over time to produce patterns of urban form and landscape fragmentation. Multilevel structure in each submodel allows drivers of land change to vary in space (e.g., by jurisdiction), rather than assuming spatial stationarity across a heterogeneous region. We applied FUTURES to simulate land development dynamics in the rapidly expanding metropolitan region of Charlotte, North Carolina, between 1996 and 2030, and evaluated spatial variation in model outcomes along an urban–rural continuum, including assessments of cell- and patch-based correctness and error. Simulation experiments reveal that changes in per capita land consumption and parameters controlling the distribution of development affect the emergent spatial structure of forests and farmlands with unique and sometimes counterintuitive outcomes.}, number={4}, journal={ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS}, author={Meentemeyer, Ross K. and Tang, Wenwu and Dorning, Monica A. and Vogler, John B. and Cunniffe, Nik J. and Shoemaker, Douglas A.}, year={2013}, month={Jul}, pages={785–807} }
 @article{sen_bozkurt_vogler_fox_giambelluca_ziegler_2013, title={Hydro-climatic effects of future land-cover/land-use change in montane mainland southeast Asia}, url={http://dx.doi.org/10.1007/s10584-012-0632-0}, DOI={10.1007/s10584-012-0632-0}, journal={Climatic Change}, author={Sen, Omer L. and Bozkurt, Deniz and Vogler, John B. and Fox, Jefferson and Giambelluca, Thomas W. and Ziegler, Alan D.}, year={2013}, month={May} }
 @article{singh_vogler_shoemaker_meentemeyer_2012, title={LiDAR-Landsat data fusion for large-area assessment of urban land cover: Balancing spatial resolution, data volume and mapping accuracy}, volume={74}, ISSN={["1872-8235"]}, url={http://dx.doi.org/10.1016/j.isprsjprs.2012.09.009}, DOI={10.1016/j.isprsjprs.2012.09.009}, abstractNote={The structural characteristics of Light Detection and Ranging (LiDAR) data are increasingly used to classify urban environments at fine scales, but have been underutilized for distinguishing heterogeneous land covers over large urban regions due to high cost, limited spectral information, and the computational difficulties posed by inherently large data volumes. Here we explore tradeoffs between potential gains in mapping accuracy with computational costs by integrating structural and intensity surface models extracted from LiDAR data with Landsat Thematic Mapper (TM) imagery and evaluating the degree to which TM, LiDAR, and LiDAR-TM fusion data discriminated land covers in the rapidly urbanizing region of Charlotte, North Carolina, USA. Using supervised maximum likelihood (ML) and classification tree (CT) methods, we classified TM data at 30 m and LiDAR data and LiDAR-TM fusions at 1 m, 5 m, 10 m, 15 m and 30 m resolutions. We assessed the relative contributions of LiDAR structural and intensity surface models to classification map accuracy and identified optimal spatial resolution of LiDAR surface models for large-area assessments of urban land cover. ML classification of 1 m LiDAR-TM fusions using both structural and intensity surface models increased total accuracy by 32% compared to LiDAR alone and by 8% over TM at 30 m. Fusion data using all LiDAR surface models improved class discrimination of spectrally similar forest, farmland, and managed clearings and produced the highest total accuracies at 1 m, 5 m, and 10 m resolutions (87.2%, 86.3% and 85.4%, respectively). At all resolutions of fusion data and using either ML or CT classifier, the relative contribution of the LiDAR structural surface models (canopy height and normalized digital surface model) to classification accuracy is greater than the intensity surface. Our evaluation of tradeoffs between data volume and thematic map accuracy for this study system suggests that a spatial resolution of 5 m for LiDAR surface models best balances classification performance and the computational challenges posed by large-area assessments of land cover.}, journal={ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING}, author={Singh, Kunwar K. and Vogler, John B. and Shoemaker, Douglas A. and Meentemeyer, Ross K.}, year={2012}, month={Nov}, pages={110–121} }
 @article{fox_vogler_sen_giambelluca_ziegler_2012, title={Simulating Land-Cover Change in Montane Mainland Southeast Asia}, url={http://dx.doi.org/10.1007/s00267-012-9828-3}, DOI={10.1007/s00267-012-9828-3}, journal={Environmental Management}, author={Fox, Jefferson and Vogler, John B. and Sen, Omer L. and Giambelluca, Thomas W. and Ziegler, Alan D.}, year={2012}, month={May} }
 @article{evans_phanvilay_fox_vogler_2011, title={An agent-based model of agricultural innovation, land-cover change and household inequality: the transition from swidden cultivation to rubber plantations in Laos PDR}, url={http://dx.doi.org/10.1080/1747423x.2011.558602}, DOI={10.1080/1747423x.2011.558602}, abstractNote={This article examines the transition from shifting cultivation to rubber production for a study area in northern Laos PDR using an agent-based model of land-cover change. A primary objective of the model was to assess changes in household-level inequality with the transition from shifting cultivation to rubber adoption. A secondary objective was to develop explanations for the rate of rubber adoption in the study area. We fit the model to historical land-cover data and land use histories developed from household-level field interviews to reproduce the land use decisions of smallholders over time. The model results indicate an increase in household inequality over time as a function of the variable rate of rubber adoption over time.}, journal={Journal of Land Use Science}, author={Evans, Tom P. and Phanvilay, Khamla and Fox, Jefferson and Vogler, John}, year={2011}, month={Jun} }
 @article{guardiola‐claramonte_troch_ziegler_giambelluca_durcik_vogler_nullet_2010, title={Hydrologic effects of the expansion of rubber (<i>Hevea brasiliensis</i>) in a tropical catchment}, url={http://dx.doi.org/10.1002/eco.110}, DOI={10.1002/eco.110}, abstractNote={AbstractThis study investigates basin‐scale hydrologic implications of the replacement of forest‐dominated land cover by rubber plantations in Montane Mainland Southeast Asia. The paper presents a new method for estimating the water demand of rubber and consequently water losses to the atmosphere through rubber evapotranspiration (ET). In this paper we argue that rubber ET is energy‐limited during the wet season, but during the dry season water consumption is mostly governed by environmental variables that directly affect rubber phenology, namely, vapour pressure deficit, temperature and photoperiodicity. The proposed ET model is introduced into a hillslope‐based hydrologic model to predict the basin‐scale hydrologic consequences of rubber replacing native vegetation. Simulations suggest greater annual catchment water losses through ET from rubber dominated landscapes compared to traditional vegetation cover. This additional water use reduces discharge from the basin, or its storage. Copyright © 2010 John Wiley & Sons, Ltd.}, journal={Ecohydrology}, author={Guardiola‐Claramonte, Maite and Troch, Peter A. and Ziegler, Alan D. and Giambelluca, Thomas W. and Durcik, Matej and Vogler, John B. and Nullet, Michael A.}, year={2010}, month={Sep} }
 @article{cuo_vogler_fox_2010, title={Topographic normalization for improving vegetation classification in a mountainous watershed in Northern Thailand}, url={http://dx.doi.org/10.1080/01431160903154333}, DOI={10.1080/01431160903154333}, abstractNote={Land cover classifications are adversely affected by shading or topographic effects in mountainous areas in that the spectral properties of an entity in the shade appear to be different from those of the same entity in a sunlit area. Topographic effects can make it especially difficult to distinguish different successional stages of vegetation. The current work uses a simplified topographic normalization method to reduce the topographic effect and to improve land cover classification in a mountainous watershed in northern Thailand. Data used in the study were two Landsat 7 Enhanced Thematic Mapper Plus (ETM+) images acquired on 5 March 2000 and 7 February 2002, a digital elevation model, and Global Positioning Systems (GPS) ground truth data collected in July 2002 consisting of geographic location (latitude/longitude), feature information and ground reference photographs. A supervised land cover classification was conducted on original and normalized images. In general, the classification accuracy of the different successional stages of vegetation was improved in the normalized images.}, journal={International Journal of Remote Sensing}, author={Cuo, Lan and Vogler, John B. and Fox, Jefferson M.}, year={2010}, month={Jun} }
 @article{fox_vogler_poffenberger_2009, title={Understanding Changes in Land and Forest Resource Management Systems: Ratanakiri, Cambodia}, url={https://doi.org/10.20495/tak.47.3_309}, DOI={10.20495/tak.47.3_309}, journal={Japanese Journal of Southeast Asian Studies}, author={Fox, Jefferson and Vogler, John B. and Poffenberger, Mark}, year={2009} }
 @article{guardiola‐claramonte_troch_ziegler_giambelluca_vogler_nullet_2008, title={Local hydrologic effects of introducing non‐native vegetation in a tropical catchment}, url={http://dx.doi.org/10.1002/eco.3}, DOI={10.1002/eco.3}, abstractNote={AbstractThis study investigates the hydrologic implications of land use conversion from native vegetation to rubber (Hevea brasiliensis) in Southeast Asia. The experimental catchment, Nam Ken (69 km2), is located in Xishuangbanna Prefecture (22°N, 101°E), in the south of Yunnan province, in southwestern China. During 2005 and 2006, we collected hourly records of 2 m deep soil moisture profiles in rubber and three native land‐covers (tea, secondary forest and grassland), and measured surface radiation above the tea and rubber canopies. Observations show that root water uptake of rubber during the dry season is controlled by day‐length, whereas water demand of the native vegetation starts with the arrival of the first monsoon rainfall. The different dynamics of root water uptake in rubber result in distinct depletion of soil moisture in deeper layers. Traditional evapotranspiration and soil moisture models are unable to simulate this specific behaviour. Therefore, a different conceptual model, taking in account vegetation dynamics, is needed to predict hydrologic changes due to land use conversion in the area. Copyright © 2008 John Wiley & Sons, Ltd.}, journal={Ecohydrology}, author={Guardiola‐Claramonte, Maite and Troch, Peter A. and Ziegler, Alan D. and Giambelluca, Thomas W. and Vogler, John B. and Nullet, Michael A.}, year={2008}, month={Jan} }
 @article{ziegler_giambelluca_nullet_sutherland_tantasarin_vogler_negishi_2009, title={Throughfall in an evergreen-dominated forest stand in northern Thailand: Comparison of mobile and stationary methods}, url={http://dx.doi.org/10.1016/j.agrformet.2008.09.002}, DOI={10.1016/j.agrformet.2008.09.002}, abstractNote={Throughfall determined by stationary and mobile methods in a disturbed evergreen-dominated forest stand in northern Thailand was 82% of rainfall (1134 mm) during a 4-month study period in the monsoon rain season of 2002. Associated coefficients of variation and standard errors were ≤10% and 2%, respectively, for both methods. Agreement between four stationary trough collectors and 20 mobile standard gauge collectors was achieved only after 35 sampling occasions, having a total rainfall depth >700 mm, and included one storm event >100 mm. Several canopy trees contributed to points with throughfall > rainfall by channeling stemflow to common drip points on the trunk and large limbs. However, no significant correlation was observed between throughfall point measurements and corresponding canopy cover. Although 180-point measurements of throughfall provided a realistic representation of the spatial variability within the 500-m2 forest stand, it is questionable that they duplicated the basin-scale variability, which would be affected both by tree gaps and variable topographically related rain shadow effects.}, journal={Agricultural and Forest Meteorology}, author={ZIEGLER, A and GIAMBELLUCA, T and NULLET, M and SUTHERLAND, R and TANTASARIN, C and VOGLER, J and NEGISHI, J}, year={2009}, month={Feb} }
 @article{sidle_ziegler_vogler_2007, title={Contemporary changes in open water surface area of Lake Inle, Myanmar}, url={http://dx.doi.org/10.1007/s11625-006-0020-7}, DOI={10.1007/s11625-006-0020-7}, journal={Sustainability Science}, author={Sidle, Roy C. and Ziegler, Alan D. and Vogler, John B.}, year={2007}, month={Mar} }
 @article{ziegler_giambelluca_plondke_leisz_tran_fox_nullet_vogler_troung_vien_2007, title={Hydrological consequences of landscape fragmentation in mountainous northern Vietnam: Buffering of Hortonian overland flow}, url={http://dx.doi.org/10.1016/j.jhydrol.2007.01.031}, DOI={10.1016/j.jhydrol.2007.01.031}, abstractNote={We use a hydrology-based fragmentation index to explore the influence of land-cover distribution on the generation and buffering of Hortonian overland flow (HOF) in two disturbed upland basins in northern Vietnam (Tan Minh). Both the current degree of fragmentation in Tan Minh and the current spatial arrangement of buffers (relative to HOF source areas) provide only limited opportunities for infiltrating surface runoff from upslope source areas, in part because of the high connectivity of swidden fields on long hillslopes. The intentional placement of buffers below HOF sources and the reduction of the down-slope lengths of swidden fields could reduce the occurrence of HOF on individual hillslopes. Reduction of the total watershed total depth of HOF would require maintaining a sufficient area of buffering land covers; and this may necessitate the use of longer fallow periods. These measures are, however, counter to the land-practice trends witnessed in the last several decades (i.e., no buffers, cultivation of long slopes, and increasingly shorter fallow periods). The two most likely scenarios of future land-cover change in Tan Minh—one representing increased fragmentation, the other decreased—both lead to an increase in HOF because of reduced buffering potential. The unlikely scenario of abandonment of agriculture and subsequent regeneration of forest, leads to both less fragmentation and less HOF. The study highlights the hydrological impacts associated with fragmentation at Tan Minh, which is the product of decades of local and regional forcing factors that have dictated the degree and timing of timber removal and swiddening at the site.}, journal={Journal of Hydrology}, author={Ziegler, Alan D. and Giambelluca, Thomas W. and Plondke, Don and Leisz, Stephen and Tran, Liem T. and Fox, Jefferson and Nullet, Michael A. and Vogler, John B. and Troung, Dao Minh and Vien, Tran Duc}, year={2007}, month={Apr} }
 @article{mcnamara_ziegler_wood_vogler_2006, title={Channel head locations with respect to geomorphologic thresholds derived from a digital elevation model: A case study in northern Thailand}, url={http://dx.doi.org/10.1016/j.foreco.2005.12.014}, DOI={10.1016/j.foreco.2005.12.014}, abstractNote={The shape of a catchment is controlled by the interplay of different erosion processes acting within the catchment. It is therefore possible to assess dominant erosion processes, and geomorphologic thresholds that spatially separate those processes, by evaluating catchment form. In this paper, geomorphologic thresholds are detected in a digital elevation model of the Pang Khum Experimental Watershed in northern Thailand and compared to the locations of field mapped channel heads. The intersection of thresholds in the slope–area relationship, the probability distribution of drainage areas, and the probability distribution of energy index produce distinct domains in slope–area space that partition the landscape according to erosion mechanisms. All mapped channel heads plot higher than an energy threshold defined by the product of slope and the square root of drainage area. Above this threshold different types of channel heads are partitioned by independent slope or drainage area thresholds. For example, channel heads formed at groundwater seeps plot higher than a drainage area threshold, independent of slope. Channel heads that originate from landslides and overland flow erosion plot higher than a slope threshold, independent of drainage area. It is our interpretation that the channel heads that did not initiate at groundwater seeps were affected by human disturbance (forest conversion for swidden-based agriculture), as they tend to lay above seeps on highly disturbed hillslopes. This paper explores relationships between the shape of a catchment as defined by a digital elevation model and the distribution of mapped channel heads. These relationships serve as a first-order means to identify locations of potentially unstable areas in a landscape, thereby providing a basis to assess the potential impacts of future catchment disturbances.}, journal={Forest Ecology and Management}, author={McNamara, James P. and Ziegler, Alan D. and Wood, Spencer H. and Vogler, John B.}, year={2006}, month={Mar} }
 @article{jianchu_fox_vogler_yongshou_lixin_jie_leisz_2005, title={Land-Use and Land-Cover Change and Farmer Vulnerability in Xishuangbanna Prefecture in Southwestern China}, url={http://dx.doi.org/10.1007/s00267-003-0289-6}, DOI={10.1007/s00267-003-0289-6}, journal={Environmental Management}, author={Jianchu, Xu and Fox, Jefferson and Vogler, John B. and Yongshou, Zhang Peifang Fu and Lixin, Yang and Jie, Qian and Leisz, Stephen}, year={2005}, month={Sep} }
 @article{fox_vogler_2005, title={Land-Use and Land-Cover Change in Montane Mainland Southeast Asia}, url={http://dx.doi.org/10.1007/s00267-003-0288-7}, DOI={10.1007/s00267-003-0288-7}, journal={Environmental Management}, author={Fox, Jefferson and Vogler, John B.}, year={2005}, month={Sep} }
 @article{vogler_butler_1996, title={PEDESTRIAN- AND BICYCLE-INDUCED PATH EROSION ON A UNIVERSITY CAMPUS}, url={http://dx.doi.org/10.1080/02723646.1996.10642597}, DOI={10.1080/02723646.1996.10642597}, abstractNote={Soil denudation studies in urban environments are infrequent in the geomorphic literature. Here we describe the amount of soil erosion associated with pedestrian and bicycle pathways on an American university campus. The amount of soil denudation from thirty pedestrian/bicycle paths on the campus of the University of North Carolina was determined by morphometric measurements. Volumes denuded ranged from nearly 20 m3 to <0.2 m3 per site. Highest amounts were located at sites adjacent to a football stadium. Three types of paths were recognized, based on their utilization: paths running adjacent to existing sidewalks; paths cutting across lawns and through shrubbery from one sidewalk to another; and those formed by bicycles in order to avoid going up or down steps.}, journal={Physical Geography}, author={Vogler, John B. and Butler, David R.}, year={1996}, month={Sep} }