A5058410328- Hydrology and Watershed Management Studies
- Plant Water Relations and Carbon Dynamics
- Groundwater flow and contamination studies
- Landslides and related hazards
- Cryospheric studies and observations
- Hydrology and Sediment Transport Processes
- demographic modeling and climate adaptation
- Fire effects on ecosystems
- Geology and Paleoclimatology Research
- Soil and Water Nutrient Dynamics
- Flood Risk Assessment and Management
- Groundwater and Isotope Geochemistry
- Hydrological Forecasting Using AI
- Experimental Learning in Engineering
- Fecal contamination and water quality
- 3D Surveying and Cultural Heritage
- Urban Stormwater Management Solutions
- Soil and Unsaturated Flow
- Advanced Vision and Imaging
- Computational Geometry and Mesh Generation
- Heavy metals in environment
- Rangeland and Wildlife Management
- Arsenic contamination and mitigation
- Environmental DNA in Biodiversity Studies
- Gut microbiota and health
University of Arizona
2015-2023
Oracle (United States)
2018
Abstract In steep landscapes, wildfire‐induced changes to soil and vegetation can lead extreme hazardous geomorphic responses, including debris flows. The mechanisms that heightened however, depend on many site‐specific factors regional climate, vegetation, texture, burn severity. As climate land use change drive in fire regime, there is an increasing need understand how alters particularly areas where has been historically infrequent. Here, we examine differences the initiation, magnitude,...
Abstract This study coupled long‐term hydrometric and stable water isotope data to identify links between subsurface storage vegetation in a subhumid mountain catchment Arizona, USA. Specific observations included catchment‐scale hydrologic fluxes soil isotopes from stream water, groundwater, sap Arizona pine ( Pinus arizonica ) Douglas fir Pseudotsuga menziesii individuals. Here, we find that tightly bound was sufficient meet dry period demand when the former defined terms of field capacity...
Abstract Predicting fluid biogeochemistry in the vadose zone is difficult because of time‐dependent variation multiple controlling factors, such as temperature, moisture, and biological activity. Furthermore, soils are multicomponent, heterogeneous porous media where manifold reactions may be affecting solution chemistry. We postulated that ecosystem‐scale processes, carbon fixation ecohydrologic partitioning, control subsurface biogeochemical reactions, including mineral weathering. To test...
Abstract High-elevation, snow-dependent, semiarid ecosystems across southwestern United States are expected to be vulnerable climate change, including drought and fire, with implications for various aspects of the water cycle. To that end, much less is known about dynamics transpiration, an important component cycle this region. At individual-tree scale, transpiration estimated by scaling mean sap flux density hydroactive sapwood area (SA). SA also remains a key factor in effectively...
Abstract Catchment‐scale response functions, such as transit time distribution (TTD) and evapotranspiration (ETTD), are considered fundamental descriptors of a catchment's hydrologic ecohydrologic responses to spatially temporally varying precipitation inputs. Yet, estimating these functions is challenging, especially in headwater catchments where data collection complicated by rugged terrain, or semi‐arid sub‐humid areas infrequent. Hence, we developed practical approaches for both TTD ETTD...
Microbial communities in incipient soil systems serve as the only biotic force shaping landscape evolution. However, underlying ecological forces microbial community structure and function are inadequately understood. We used amplicon sequencing to determine taxonomic assembly metagenome evaluate functional basaltic subjected precipitation. Community composition was stratified with depth pre-precipitation samples, surficial maintaining their distinct diversity after precipitation, while...
We used the weighted wavelet method to perform spectral analysis of observed long-term precipitation, streamflow, actual evapotranspiration, and soil water storage at a sub-humid mountain catchment near Tucson, Arizona, USA. Fractal scaling in precipitation daily change occurred up period 14 days corresponded typical duration relatively wet dry intervals. In contrast, fractal could be 0.5 years streamflow evapotranspiration. By considering observations hydrologic fluxes storages, we show...
Abstract Land-atmosphere interactions at different temporal and spatial scales are important for our understanding of the Earth system its modeling. The Landscape Evolution Observatory (LEO) Biosphere 2, managed by University Arizona, hosts three nearly identical artificial bare-soil hillslopes with dimensions 11 × 30 m 2 (1 depth) in a controlled highly monitored environment within large greenhouses. These facilities provide unique opportunity to explore these interactions. dataset...
Current understanding of the dynamic and slow flow paths that support streamflow in mountain headwater catchments is inhibited by lack long-term hydrogeochemical data frequent use short residence time age tracers. To address this, current study combined traditional mean transit state-of-the-art fraction young water ( F yw ) metrics with stable isotopes tritium tracers to characterize at Marshall Gulch, a sub-humid catchment Santa Catalina Mountains, Arizona, USA. The results show varied...
Abstract. Current understanding of the dynamic flow paths and subsurface water storages that support streamflow in mountain catchments is inhibited by lack long-term hydrologic data frequent use single age tracers are not applicable to older groundwater reservoirs. To address this, current study used both multiple metrics characterize transient nature with respect change catchment storage at Marshall Gulch, a sub-humid headwater Santa Catalina Mountains, Arizona, USA. The fraction was...
In mine closure projects, the term landform typically refers to shape of a facility that is intended mimic natural forms surrounding stable topography.In arid climates, shapes may be chosen increase erosional stability final design.Closure facilities can result in long slope lengths (>240 m) are exceptionally prone damage from rainfall.Structural strategies past have utilized systems benches and channels break up lengths, which pose long-term risk some settings.Instead, convex-concave...
Catchment-scale response functions, such as transit time distribution (TTD) and evapotranspiration (ETTD), are considered fundamental descriptors of a catchment’s hydrologic ecohydrologic responses to spatially temporally varying precipitation inputs. Yet, estimating these functions is challenging, especially in headwater catchments where data collection complicated by rugged terrain, or semi-arid sub-humid areas infrequent. Hence, we developed practical approaches for both TTD ETTD from...
<p>We have measured unit sediment fluxes and their relationship to water discharges over 7 orders of magnitude on hillslopes up 350 m in length Arizona. Unit were using a novel combination instrumented monitoring plots repeat photogrammetric surveys analyzed volumetrically. The plots, which are ideal for measuring relatively planar portions the landscape dominated by slope-wash erosion, funnel into detention basin where bedload then flume suspended at 1-minute intervals...