Western Geographic Science Center

Publications

Filter Total Items: 387
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Year Published: 2017

Automated cropland mapping of continental Africa using Google Earth Engine cloud computing

The automation of agricultural mapping using satellite-derived remotely sensed data remains a challenge in Africa because of the heterogeneous and fragmental landscape, complex crop cycles, and limited access to local knowledge. Currently, consistent, continent-wide routine cropland mapping of Africa does not exist, with most studies focused...

Xiong, Jun N.; Thenkabail, Prasad S.; Gumma, Murali Krishna; Teluguntla, Pardhasaradhi G.; Poehnelt, Justin; Congalton, Russell G.; Yadav, Kamini; Thau, David
Jun Xiong, Thenkabail, P.S., Gumma, M.K., Teluguntla, P., Poehnelt, J., Congalton, R.G., Yadav, K. and Thau, D. 2017. Automated cropland mapping of continental Africa using Google Earth Engine cloud computing. ISPRS Journal of Photogrammetry and Remote Sensing 126:225–244.

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Year Published: 2017

Coping with historic drought in California rangelands: Developing a more effective institutional response

Drought response is widely varied depending on both the characteristics of the drought and the ability of individual ranchers to respond.Assistance from institutions during drought has not typically considered preemptive, during, and post-drought response as a strategic approach, which recognizes biophysical, sociological, and economic...

Brown, Joel R.; Alvarez, Pelayo; Byrd, Kristin B.; Deswood, Helena; Elias, Emile; Spiegal, Sheri
Brown, J., P. Alvarez, K. Byrd, H. Deswood, E. Elias, and S. Spiegal. 2017. Coping With Historic Drought in California Rangelands: Developing a More Effective Institutional Response. Rangelands 39:73-78.

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Year Published: 2017

Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD)

Accuracy assessment is a standard protocol of National Land Cover Database (NLCD) mapping. Here we report agreement statistics between map and reference labels for NLCD 2011, which includes land cover for ca. 2001, ca. 2006, and ca. 2011. The two main objectives were assessment of agreement between map and reference labels for the three, single-...

Wickham, James; Stehman, Stephen V.; Gass, Leila; Dewitz, Jon; Sorenson, Daniel G.; Granneman, Brian J.; Poss, Richard V.; Baer, Lori Anne
James Wickham, Stephen V. Stehman, Leila Gass, Jon A. Dewitz, Daniel G. Sorenson, Brian J. Granneman, Richard V. Poss, Lori A. Baer, Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD), Remote Sensing of Environment, Volume 191, 15 March 2017, Pages 328-341, ISSN 0034-4257, http://dx.doi.org/10.1016/j.rse.2016.12.026. (http://www.sciencedirect.com/science/article/pii/S003442571630503X)

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Year Published: 2017

Harmonization of forest disturbance datasets of the conterminous USA from 1986 to 2011

Several spatial forest disturbance datasets exist for the conterminous USA. The major problem with forest disturbance mapping is that variability between map products leads to uncertainty regarding the actual rate of disturbance. In this article, harmonized maps were produced from multiple data sources (i.e., Global Forest Change, LANDFIRE...

Soulard, Christopher E.; Acevedo, William; Cohen, Warren B.; Yang, Zhiqiang; Stehman, Stephen V.; Taylor, Janis L.
Soulard, C.E., Acevedo, W., Cohen, W.B. et al. Environ Monit Assess (2017) 189: 170. doi:10.1007/s10661-017-5879-5

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Year Published: 2017

Fallow-land Algorithm based on Neighborhood and TemporalAnomalies (FANTA) to map planted versus fallowed croplands usingMODIS data to assist in drought studies leading to water and foodsecurity assessments

An important metric to monitor for optimizing water use in agricultural areas is the amount of cropland left fallowed, or unplanted. Fallowed croplands are difficult to model because they have many expressions; for example, they can be managed and remain free of vegetation or be abandoned and become weedy if the climate for that season permits. We...

Wallace, Cynthia; Thenkabail, Prasad S.; Rodriguez, Jesus R.; Brown, Melinda K.
Wallace, C.S.A., P. Thenkabail, J.R. Rodriguez, M.K. Brown. 2017. Fallow-land Algorithm based on Neighborhood and Temporal Anomalies (FANTA) to map planted versus fallowed croplands using MODIS data to inform drought studies for water and food security assessments, GIScience & Remote Sensing, 54- Issue 2: Special Issue: Advances in Remote Sensing and GIS-based Drought Monitoring http://dx.doi.org/10.1080/15481603.2017.1290913

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Year Published: 2017

Multi-temporal LiDAR and Landsat quantification of fire-induced changes to forest structure

Measuring post-fire effects at landscape scales is critical to an ecological understanding of wildfire effects. Predominantly this is accomplished with either multi-spectral remote sensing data or through ground-based field sampling plots. While these methods are important, field data is usually limited to opportunistic post-fire observations, and...

McCarley, T. Ryan; Kolden, Crystal A.; Vaillant, Nicole M.; Hudak, Andrew T.; Smith, Alistair M.S.; Wing, Brian M.; Kellogg, Bryce; Kreitler, Jason R.
McCarley, TR, CA Kolden, NM Vaillant, AT Hudak, AMS Smith, BM Wing, B Kellogg, and J Kreitler. (2017) Multi-temporal LiDAR and Landsat comparison of fire-induced changes to forest structure. Remote Sensing of Environment. http://dx.doi.org/10.1016/j.rse.2016.12.022

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Year Published: 2017

Tsunami travel time maps for Del Norte and Humboldt Counties, CA, reference year 2010

Tsunami travel time maps for Del Norte and Humboldt Counties in California in vector (shapefile) format for both slow and fast walking speeds and for bridges intact and bridges removed.

Jones, Jeanne M.; Wood, Nathan J.

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Year Published: 2017

Influence of road network and population demand assumptions in evacuation modeling for distant tsunamis

Tsunami evacuation planning in coastal communities is typically focused on local events where at-risk individuals must move on foot in a matter of minutes to safety. Less attention has been placed on distant tsunamis, where evacuations unfold over several hours, are often dominated by vehicle use and are managed by public safety officials....

Henry, Kevin; Wood, Nathan J.; Frazier, Tim G.
Henry, K.D., Wood, N.J. & Frazier, T.G. Nat Hazards (2017) 85: 1665. doi:10.1007/s11069-016-2655-8

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Year Published: 2017

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

Rock-detention structures are used as restoration treatments to engineer ephemeral stream channels of southeast Arizona, USA, to reduce streamflow velocity, limit erosion, retain sediment, and promote surface-water infiltration. Structures are intended to aggrade incised stream channels, yet little quantified evidence of efficacy is available. The...

Norman, Laura M.; Sankey, Joel B.; Dean, David; Caster, Joshua J.; DeLong, Stephen B.; Henderson-DeLong, Whitney; Pelletier, Jon D.
Norman, L. M., Sankey, J. B., Dean, D. J., Caster, J., DeLong, S. B., DeLong, W. M., & Pelletier, J. (2017). Quantifying geomorphic change at ephemeral stream restoration sites using a coupled-model approach. Geomorphology, 283, 1–16. http://doi.org/10.1016/j.geomorph.2017.01.017

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Year Published: 2017

Human footprint affects US carbon balance more than climate change

The MC2 model projects an overall increase in carbon capture in conterminous United States during the 21st century while also simulating a rise in fire causing much carbon loss. Carbon sequestration in soils is critical to prevent carbon losses from future disturbances, and we show that natural ecosystems store more carbon belowground than managed...

Bachelet, Dominique; Ferschweiler, Ken; Sheehan, Tim; Baker, Barry; Sleeter, Benjamin M.; Zhu, Zhiliang
D. Bachelet, K. Ferschweiler, T. Sheehan, B. Baker, B. Sleeter and Z. Zhu, Human Footprint Affects US Carbon Balance More Than Climate Change, In Reference Module in Earth Systems and Environmental Sciences, Elsevier, 2017, ISBN 9780124095489, http://dx.doi.org/10.1016/B978-0-12-409548-9.09770-0

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Year Published: 2016

Intra-community implications of implementing multiple tsunami-evacuation zones in Alameda, California

Tsunami-evacuation planning in coastal communities is typically based on maximum evacuation zones for a single scenario or a composite of sources; however, this approach may over-evacuate a community and overly disrupt the local economy and strain emergency-service resources. To minimize the potential for future over-evacuations, multiple...

Peters, Jeff; Wood, Nathan J.; Wilson, Rick; Miller, Kevin

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Year Published: 2016

Mapping presence and predicting phenological status of invasive buffelgrass in southern Arizona using MODIS, climate and citizen science observation data

The increasing spread and abundance of an invasive perennial grass, buffelgrass (Pennisetum ciliare), represents a critical threat to the native vegetation communities of the Sonoran desert in southern Arizona, USA, where buffelgrass eradication is a high priority for resource managers. Herbicidal treatment of buffelgrass is most effective when...

Wallace, Cynthia S.A.; Walker, Jessica J.; Skirvin, Susan M.; Patrick-Birdwell, Caroline; Weltzin, Jake F.; Raichle, Helen
Wallace, C.S.A.; Walker, J.J.; Skirvin, S.M.; Patrick-Birdwell, C.; Weltzin, J.F.; Raichle, H. Mapping Presence and Predicting Phenological Status of Invasive Buffelgrass in Southern Arizona Using MODIS, Climate and Citizen Science Observation Data. Remote Sens. 2016, 8, 524.