Substantial tracts of land in the southwestern and western U.S. are undergoing or will require ERA. Toxicity bioassays employed in baseline ERAs are, for the most part. representative of mesic systems, and highly standardized test species (e.g., lettuce, earthworm) are generally not relevant to arid system toxicity testing. Conversely, relevant test species are often poorly characterized with r...

abstract one of the methods for improving soil physical quality of arid and semiarid regions is the application of cheap organic conditioners such as sewage sludge. this research was conducted in large pots (50 cm diameter, 25 cm height) to study the effects of tabriz petrochemical biological sludge at 4 rates (25, 50, 75 and 100 tons/ha) on organic carbon (oc), mean weight diameter (mwd) of ag...

The stable isotopes of lithium (Li) serve as a robust proxy silicate weathering. fate and transport these in the dissolved load major rivers have been characterized to infer changes both contemporary weathering regimes paleo-conditions. In this contribution, we deconvolve integrated signal into individual processes that fractionate Li at inception by directly measuring isotope ratios waters (δ7...

Topography is an important land-surface characteristic that affects most aspects of the water balance in a catchment, including the generation of surface and sub-surface runoff; the flow paths followed by water as it moves down and through hillslopes and the rate of water movement. All of the spatially explicit fully distributed hydraulic and hydrological models use topography (represented by t...

Near-real-time monitoring of active landslides or landslide-prone hillslopes can provide immediate notification of landslide activity, as well as high-quality data sets for understanding the initiation and movement of landslides. Typical components of ground-based, near-real-time landslide monitoring systems include field sensors, data acquisition systems, remote telemetry, and software for bas...

The heterogeneity of carbon dioxide (CO2) and methane (CH4) sources within across watersheds presents a challenge to understanding the contributions different ecosystem patch types stream corridor watershed cycling. Changing hydrologic connections between patches (e.g., streams, vernal pools, hillslopes) can influence greenhouse gas emissions, but spatiotemporal dynamics emissions among are not...

Abstract. Soil thickness plays a central role in the interactions between vegetation, soils, and topography, where it controls retention release of water, carbon, nitrogen, metals. However, mapping soil thickness, here defined as mobile regolith layer, at high spatial resolution remains challenging. Here, we develop hybrid model that combines process-based empirical relationships to estimate he...

Wildfires can have major impacts on water scarcity and quality linked to off-site transfer of polluting ash nutrients. Understanding sediment sources in burnt landscapes help develop mitigation strategies, especially catchments planted with introduced species that are prone fire. We investigated activated by post-fire rainfall a small-forested catchment was impacted severe wildfire. The aim use...