Jornada Experimental Range (JER), Las Cruces, New Mexico:
Our group collaborates on the JER Long Term Ecological Research (LTER) site with New Mexico State University, USDA Agricultural Research Service and other universities to study the causes and consequences of woody plant encroachment and to address ecohydrological questions in desert rangelands. We have instrumented a small watershed consisting of a mixed Chihuahuan Desert shrubland, where we have on-going measurements and modeling studies of hydrological, meteorological and phenological processes. The instrument network consists of 20 soil moisture profiles around an eddy covariance tower and 15 soil moisture profiles arranged along hillslope transects. A network of rain gauges and channel runoff flumes is also deployed. A COSMOS soil moisture sensor with ancillary data has been installed. Results from the observational efforts are reported in Vivoni (2012), Templeton et al. (2014), Vivoni et al. (2014), Anderson and Vivoni (2016), Schreiner-McGraw et al. (2016), Mascaro and Vivoni (2016), Schreiner-McGraw and Vivoni (2017, 2018) and Schreiner-McGraw et al. (2016, 2019, 2020).
Santa Rita Experimental Range (SRER), Green Valley, Arizona:
Our group collaborates on the SRER activities with the USDA Agricultural Research Service and the University of Arizona to study long-term vegetation changes and their impact on land surface processes including the active role of grazing practices. We have instrumented a small watershed located consisting of a Sonoran Desert mesquite savanna with an environmental sensor network and have obtained high-resolution imagery from aircraft platforms to study seasonal ecohydrological dynamics and the role of land surface conditions. The instrument network consists of 20 soil moisture profiles around an eddy covariance tower and 25 soil moisture profiles arranged along transects. A network of rain gauges and channel runoff flumes is also deployed a COSMOS soil moisture sensor with ancillary data has been installed. Results from the observational efforts are reported in Pierini et al. (2014), Vivoni et al. (2014), Anderson and Vivoni (2016), Schreiner-McGraw et al. (2016) and Mascaro and Vivoni (2016).
Rio Sonora Hydrologic Observatory (RSHO), Rayon, Sonora, Mexico:
Our group helps lead a large-scale hydrologic observatory in Sonora, Mexico with collaborators from the Universidad de Sonora and Instituto Tecnologico de Sonora with the goal of quantifying ecohydrological processes during the North American monsoon. The observatory includes a regional network of precipitation, soil moisture and evapotranspiration measurements. In addition, several field campaigns have been conducted in the basin (SMEX04, IRES06-08, UMB-WEST) with the goal of assessing the dynamics of summer season vegetation green-up. The 2017 GPS-Hydrometeorological Monsoon Network with collaborators from 10 institutions is the most recent effort in the study region. Data sets from this study are available at Zenodo.
Results from the observational and modeling efforts are reported in Vivoni et al. (2007, 2010), Mendez-Barroso et al. (2009, 2014), Mendez-Barroso and Vivoni (2010), Mascaro and Vivoni (2010, 2012), Xiang et al. (2014, 2017, 2018), Mascaro et al. (2015, 2019), and Ko et al. (2019), among others.
Central Arizona Project (CAP-LTER), Phoenix, Arizona:
Our group collaborates on the CAP-LTER activities with other scientists at Arizona State University to study the water and energy interactions in urban Phoenix, in particular the role of irrigation on hydrological fluxes. We collaborate on the collection and analysis of hydrological and energy balance data at the North Desert Village, Indian Bend Wash and Maryvale sites, with the goal of conducting urban hydrological modeling of these neighborhoods using a number of different tools (soil water balance modeling, HEC-HMS, tRIBS) We are also involved in urban eddy covariance measurements using a mobile tower across a set of different urban land covers. Results from the modeling efforts are reported in Volo et al. (2014, 2015) and from the mobile towers is reported in Templeton et al. (2018) and Perez-Ruiz et al. (2020).
Sevilleta National Wildlife Refuge (SNWR), Socorro, New Mexico:
Our group conducted a multiyear ecohydrological study in the Sevilleta National Wildlife Refuge at a headwater basin exhibiting stark contrasts in eccosystem, soil and terrain properties driven by aspect differences. The overall goal has been to quantify soil-water-climate-plant interactions on complex terrain to improve our understanding of the active role of plants in the co-evolution of soils and landscapes. An extensive instrument network consisting of 4 rain gauges, 8 runoff plots, 3 Bowen Ratio stations and micrometeorological measurements and 3 soil moisture and temperature transects. These measurements were complemented with a differential GPS survey and a LiDAR canopy height and bare-earth digital elevation models. Results from the field study and modeling efforts are reported in Gutierrez-Jurado et al. (2006, 2007, 2013a, 2013b, 2014).
CBBG Soil Erosion Facility, Mesa, Arizona:
Our group collaborates with the Center for Bio-Mediated and Bio-inspired Geotechnics at the Soil Erosion Facility on the ASU Polytechnic campus. Our efforts include the design, construction, and implementation of a large rainfall simulator and soil test beds to evaluate the effectiveness engineered erosion control products. Results from studies using disdrometers will be used in the assessment of the rainfall produced and applied to the surface by the simulator. Sediment and runoff collection are complemented by measurements of surface changes using near-field remote sensing from terrestrial LIDAR.
City of Phoenix Parks, Phoenix, Arizona:
Our group collaborates with the City of Phoenix to study potential water savings of compost application in multipurpose turf grass at city parks. Soil moisture sensors and rain gauges have been installed at various parks located in the City of Phoenix, where the compost is being applied. Three parks have been monitored: Encanto Park, Smith Park and Paradise Valley Park. An eddy covariance tower was added to the Encanto Park AZMET station during the study period. A soil water balance (SWB) model will be used to simulate changes in soil water in response to irrigation, precipitation and evapotranspiration and simulations will be compared to the observations.