Publications
Filter Total Items: 488
Augmented normalized difference water index for improved monitoring of surface water
We present a comprehensive critical review of well-established satellite remote sensing water indices and offer a novel, robust Augmented Normalized Difference Water Index (ANDWI). ANDWI employs an expanded set of spectral bands, RGB, NIR, and SWIR1-2, to maximize the contrast between water and non-water pixels. Further, we implement a dynamic thresholding method, the Otsu algorithm, to enhance AN
Authors
Arash Modaresi Rad, Jason R. Kreitler, Mojitaba Sadegh
Estimating blue carbon sequestration under coastal management scenarios
Restoring and protecting “blue carbon” ecosystems - mangrove forests, tidal marshes, and seagrass meadows - are actions considered for increasing global carbon sequestration. To improve understanding of which management actions produce the greatest gains in sequestration, we used a spatially explicit model to compare carbon sequestration and its economic value over a broad spatial scale (2500 km o
Authors
Monica Mei Jeen Moritsch, Mary Alida Young, Paul Carnell, Peter I Macreadie, Catherine E. Lovelock, Emily Nicholson, Peter T. Raimondi, Lisa M. Wedding, Daniel Ierodiaconou
Sediment mobility and river corridor assessment for a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California
This river corridor assessment documents sediment mobility and river response to flood disturbance along a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California. Field and remote sensing methods were used to assess fundamental indicators of active sediment transport and river response to a combination of natural runoff events and reservoir releases during the study p
Authors
Jennifer Curtis, Travis Poitras, Sandra Bond, Kristin Byrd
Global response of terrestrial gross primary productivity to climate extremes
Extreme climate events undoubtedly have essential impacts on ecosystem gross primary productivity (GPP), but the global spatio-temporal patterns of GPP responses to climate extremes are unclear. In this study, we analyzed the responses of GPP to temperature and precipitation extremes during historical (1901–2016) and future (2006–2100) periods using climate extreme indices (CEIs) developed by the
Authors
Minshu Yuan, Qiuan Zhu, Jiang Zhang, Jinxun Liu, Huai Chen, Changhui Peng, Peng Li, Mingxu Li, Meng Wang, Pengxiang Zhao
Contemporary fire regimes provide a critical perspective on restoration needs in the Mexico-United States borderlands
The relationship between people and wildfire has always been paradoxical: fire is an essential ecological process and management tool, but can also be detrimental to life and property. Consequently, fire regimes have been modified throughout history through both intentional burning to promote benefits and active suppression to reduce risks. Reintroducing fire and its benefits back into the Sky Isl
Authors
Miguel L. Villarreal, José M. Iniguez, Aaron D. Flesch, Jamie S. Sanderlin, Citlali Cortés Montaño, Caroline Rose Conrad, Sandra L. Haire
Quantifying drought’s influence on moist soil seed vegetation in California’s Central Valley through remote sensing
Across the Central Valley of California, millions of wintering waterfowl rely on moist soil seed (MSS) plants that grow in managed seasonal wetlands as a critical source of food. Estimates of MSS plant production are used to set waterfowl habitat targets yet this information is not well known. We created the first Central Valley-wide time series maps of MSS plant distributions and productivity. We
Authors
Kristin B. Byrd, Austen Lorenz, James Anderson, Cynthia Wallace, Kara Moore-O'Leary, Jennifer Isola, Ricardo Ortega, Matt Reiter
Integrating climate change considerations into natural resource planning—An implementation guide
Executive SummaryClimate change vulnerability assessments and associated adaptation strategies and actions connect existing climate science with possible effects on natural resources and highlight potential responses. However, these assessments, which are commonly generated for large regional areas, suggest management options in general terms without guidance for choosing among strategies and acti
Authors
Jessi Kershner, Andrea Woodward, Alicia Torregrosa
Impacts of grade control structure installations on hydrology and sediment transport as an adaptive management strategy
The goal of this research was to examine the impacts of Grade Control Structure (GCS) installations at the Heard Scout Pueblo (HSP) study site in the City of Phoenix, Arizona, USA. The study site is around a high-use trail system and is comprised of eroded and incised channels that conduct high flows and associated sediments into a residential neighborhood downstream, a noted stormwater control pr
Authors
Deborah Tosline, Laura M. Norman, Blair P. Greimann, Jay Cederberg, Victor Huang, Benjamin L. Ruddell
Estimating wildfire fuel consumption with multitemporal airborne laser scanning data and demonstrating linkage with MODIS-derived fire radiative energy
Characterizing pre- and post-fire fuels remains a key challenge for estimating biomass consumption and carbon emissions from wildfires. Airborne laser scanning (ALS) data have demonstrated effectiveness for estimating canopy, and to a lesser degree, surface fuel components at fine-scale (i.e., 30 m) across landscapes. Using pre- and post-fire ALS data and corresponding field data, this study estim
Authors
T. Ryan McCarley, Andrew T. Hudak, Aaron M. Sparks, Nicole S. Vaillant, Arjan J.H. Meddens, Laura Trader, Jason R. Kreitler, Luigi Boschetti
Ultra‐high‐resolution mapping of biocrusts with Unmanned Aerial Systems
Biological soil crusts (biocrusts) occur in drylands globally where they support ecosystem functioning by increasing soil stability, reducing dust emissions and modifying soil resource availability (e.g. water, nutrients). Determining biocrust condition and extent across landscapes continues to present considerable challenges to scientists and land managers. Biocrusts grow in patches, cover vast e
Authors
Caroline Havrilla, Miguel L. Villarreal, Jacob DiBiase, Michael C. Duniway, Nichole Barger
Variations in community evacuation potential related to average return periods in probabilistic tsunami hazard analysis
Tsunami risk management requires strategies that can address multiple sources with different recurrence intervals, wave-arrival times, and inundation extents. Probabilistic tsunami hazard analysis (PTHA) provides a structured way to integrate multiple sources, including the uncertainties due to the natural variability and limited knowledge of sources. PTHA-based products relate to specific average
Authors
Nathan J. Wood, Jeff Peters, Rick I. Wilson, Jason T. Sherba, Kevin Henry
Land-use change and future water demand in California’s central coast
Understanding future land-use related water demand is important for planners and resource managers in identifying potential shortages and crafting mitigation strategies. This is especially the case for regions dependent on limited local groundwater supplies. For the groundwater dependent Central Coast of California, we developed two scenarios of future land use and water demand based on sampling f
Authors
Tamara Wilson, N. Van Schmidt, Ruth Langridge