ABSTRACT Ephemeral channels incise into the piedmonts (both alluvial fans and pediments) of the northeastern Sonoran Desert, USA. Located around metropolitan Phoenix, this tectonically quiescent region experienced only aggradation in endorheic structural basins throughout the Pliocene. A wave of aggradation then followed Salt and Gila river integration at the start of the Pleistocene. Aggradation of

ABSTRACT Various hybrid approaches combined the different deep learning and machine learning models with evolutionary optimization algorithms and have improved the accuracy of streamflow forecasting problem. In this article, three deep learning models were investigated for streamflow forecasting with various lag times at both stations (i.e. Sidi Aich and Ponteba Defluent), Algeria. Also, a machine

ABSTRACT This study investigates the influence of synoptic-scale cold fronts on microclimatic conditions within the complex terrain of Watkins Glen gorge, New York. Temperature and dewpoint temperature measurements were collected by three microclimate stations both within (two stations) and just outside (one station) of the gorge during the months of September and November. A total of nine cold fronts

ABSTRACT The Callendar dunes are located within the Santa Maria dune complex in south-central California and have been studied repeatedly since the pioneering work of Bowen and Inman in the 1960's. Previous conceptual models of the system’s Holocene evolution relate variations in dune morphologies to changes in sediment supply and sea level. In the years since their studies, conceptual frameworks of

ABSTRACT The loess-paleosol proxy records from mid-latitude Asia have been instrumental in the reconstruction of regional paleoclimate evolution and its relationship with global climatic changes. The present study explores the discrete occurrence of a loess and paleosol sequence (LPS) in the Southern Zanskar Range (SZR), NW Himalaya. Stratigraphic variations in sediment texture, supplemented with geochemical

ABSTRACT Dune systems in Atlantic Canada are relatively small given a relatively low sediment supply. The dunes are built primarily of reworked sediments as relative sea level (RSL) has risen. The foredune (at least) is reworked several times a decade by extreme weather events and many are transgressing on a decadal scale as a result of normal geomorphic processes. The key drivers shaping the dunes

ABSTRACT As vegetation cover senesces across temperate watersheds, the potential for soil erosion and subsequent sediment yields increases. Despite the importance of vegetation dynamics and evapotranspiration towards influencing watershed-scale hydrological processes, limited research has fully included these variables in modeling sediment yields, relying on surface runoff records alone. Focusing on

ABSTRACT There is a need for scientific knowledge on the spatiotemporal variability of drought episodes to establish robust drought mitigation and adaptation strategies. This study evaluates the spatiotemporal variability of drought episodes in southeastern Ethiopia at multiple time scales (3-, 6-, 12- and 24-month and three spatially different wet seasons; March–May, June–September and September–November)

ABSTRACT Rip currents can move unsuspecting swimmers offshore rapidly and represent a significant risk to beach users worldwide, including along the northern coast of Prince Edward Island (PEI), Canada. Although many rip currents are ephemeral and/or spatially variable in response to changes in the nearshore bar morphology and wave and tidal forcing, it is possible for rip channels to be geologically

ABSTRACT Morphological characteristics of cirques have been studied for decades; however, no repeatable set of metrics has been derived that can consistently identify them. Perhaps more importantly, there is no consensus definition of the form that distinguishes cirques and clusters of cirques from non-cirques. In our approach, we use Shuttle Radar Topography Mission (SRTM) digital elevation models

ABSTRACT A broad spectrum of model-derived weather datasets are available in the US. Because each product integrates atmospheric conditions with different model processes, each produces different statistical biases. This study validated air temperature from NLDAS-2 and a novel statistically downscaled NLDAS-2 against observational weather station data for the state of Florida. We statistically downscaled

ABSTRACT There is little doubt insects and other “creepy crawlies” make up the bulk of life on Earth, and yet their immense influence on landscape change and development have not really garnered adequate attention in geomorphologic and zoogeographic research. What studies do exist focus almost exclusively on ants and termites. Unfortunately, this barely scratches the surface of the myriad of ways in

(2021). Coastal relict landforms and the legacy of Tony Orme. Physical Geography. Ahead of Print.

ABSTRACT Incising gravel channels respond with a robust critical transition to the lateral alluvial supply. Previous experiments have studied how supply affects bedload transport, but I studied a setup with converging banks, where the supply–transport relation implies feedback. While increasing flows, a short range of transitional flows showed sharp increase of bedload, accompanied by channel response

ABSTRACT Biological soil crusts (BSCs) monitored over a 25-year period enhance the dissolution of the Ca-silicate plagioclase and the Mg-silicate olivine at Sonoran Desert and Colorado Plateau, USA, study sites. This first measured biological enhancement of weathering (BEW) for plagioclase is a mean of 2.3±0.4 and 3.0±0.4 for the Organic Pipe, Arizona and Moab, Utah study sites; and it is 4.9±0.8 and

ABSTRACT The morpho-tectonic characteristics of the study area were evaluated due to paleo-tectonic significance. The Upper Tons Basin is associated with the Ganga river system, originated over the fracture zones produced after the collision of Indian and Eurasian plates; hence, the study region has its tectonic importance with small-scale tectonic deformation. The relief, drainage and tectonic characteristics

ABSTRACT The population of Istanbul increased from three to fifteen million from 1970 to 2018. The city, which has no perennial fresh water resources within its metropolitan boundaries, has long imported water from other basins. In this study, the performance of a reservoir system fed by surface runoff and inter-basin water transfer is investigated and applied. Simulations are run for water demand

ABSTRACT We evaluated the impacts of the interactions among hydro-aeolian processes and micro-geomorphology on mechanisms controlling the sediment carbon source and sink within a coppice dune. The sediment sampling process was performed within different positions of each dune. Sediment grain size distribution, geometric mean diameter, mean weight diameter, labile SOC, CO2 flux, and C mineralization

ABSTRACT Pin valley is an ideal area for alluvial fans’ development. Being least disturbed and devoid of vegetation, fans of this area provide exquisite information and extraordinary opportunity to understand different factors that affect their morphology. Despite aforesaid advantages these fans are hitherto not studied. Thus, the present study is an attempt to understand the morphology of these fans

ABSTRACT Data on the origin and morphology of lake depressions in Mongolia are relatively poor. Bayan Lake in Zavkhan Province, Western Mongolia, has freshwater, supplied by groundwater emanating from a tectonic fault-oriented northeast to southwest, defining the southeastern side of the Bayan Lake. The depression of Bayan Lake has a tectonic origin, related with the fault which on its southern side

ABSTRACT Landslides are one of the most common and destructive natural hazards in the world. The Sierra-Costa region in the southwestern part of the Michoacán state, Mexico, is prone to landslides because of its physiography, geology, and climate. In particular, the area is prone to shallow landslides in the weathered rock that is triggered by heavy rainfall. Here, we present a susceptibility model

ABSTRACT Nivation, the suite of weathering and transportation processes attributed to late-lying snowpatches, is linked to the formation of cryoplanation terraces (CTs). CTs resemble giant staircases arranged in repeating sequences of low-gradient treads and steep scarps that extend over hundreds of meters. The nivation hypothesis of CT development has been supported in recent literature examining

ABSTRACT Heavy precipitation events increased over the last century in response to higher atmospheric temperature and associated increases in water vapor content, but little evidence shows that increased heavy precipitation changed flood trends. Short records, containing few extreme flood observations, limit statistical examination of relationships between global temperature, heavy precipitation, and

(2021). Introduction to special issue of physical geography in recognition of Dr. Tony Orme. Physical Geography. Ahead of Print.

ABSTRACT Understanding species distributions remains central to research in ecology and biogeography. Emphasis is placed on the spatial presence/absence of plants as related to underlying environmental factors; however, distributions result from both abiotic factors and adaptations to the abiotic environment. We analyzed poison ivy (Toxicodendron radicans (L.) Kuntze), which has high intraspecies variability

ABSTRACT Uplifted coastal terraces are present on Santa Catalina Island, but so poorly preserved that researchers have debated for more than a century whether they even exist. Morphometric analyses of LIDAR-based topography on the California Channel Islands suggest that the poor expression of terraces on Catalina Island is due a combination of (1) geological conditions less conducive to terrace formation

ABSTRACT Evaluating erosion processes and their influence on soil degradation over extensive agricultural landscape is difficult. Because of the need for analysis and mapping of this problem, we elaborated a procedure applicable to a specific, intensively farmed, erosion-threatened chernozem area of CZ or similar regions. The aim of the research was to verify the possibility of digital aerial image

ABSTRACT In the Southeastern U. S. there are Concentrated Animal Feeding Operations (CAFOs) that emit a variety of gases, including SO2. Sulfur is emitted as reduced sulfur compounds and can react in the atmosphere to produce SO2. It is expected that the concentration and spread of SO2 emissions from these sources would differ between wet and dry periods. In this research, SO2 emissions from locations

ABSTRACT Coasts are among the most diverse environments on the Earth’s surface and are unique in being affected by the convergence of terrestrial, marine and atmospheric processes. The morphology of each individual segment of coastline is a result of the interaction between the tectonic setting and the properties of the materials making up the coast and the terrestrial and marine processes attacking

ABSTRACT Landslide susceptibility is a dynamic phenomenon; it changes with slope intrinsic and transient factors. The study aims to evaluate the changes in the landslides, their size, location, and up to some extent, gradual stabilization impacts on susceptibility assessment. The majority of the models, which are developed to analyze landslide susceptibility, use landslide inventory as a dependent

ABSTRACT Deba area is intensely affected by frequent shallow landslides triggered by rainfall. This contribution explores the role of rainfall in landslide activity during a quite long time span (60 years), from a large network of rainfall gauges and a complete inventory of landslides. Out of 1,180 landslides inventoried, more than 50% occurred simultaneously in 6 known dates, corresponding to 6 episodes

ABSTRACT The Hunder Dunes occur in the Shyok valley, Ladakh region, north-western India. These barchanoid and transverse dunes consist of sand reworked from the seasonally exposed beds of the river. Wind direction is strongly uni-modal from the northwest and is controlled by valley orientation. We observed small (10–20 m long, 5–10 m wide, and up to 1.5 m high) ellipsoidal mesas in the swales between

ABSTRACT Snowmelt controls important physical and ecological processes and is widely expected to occur earlier under most climate change scenarios. The western United States (US) is dependent on seasonal snowpack for water resources and recreation, and this diverse landscape is likely to experience continued changes to snowmelt timing that will differ across the domain. In this study, we use NASA’s

Research was undertaken to assess the influence of aspect and sub-surface depth on thermal fatigue in bedrock. Contact temperatures were recorded at depths of 0.3 m, 2.0 m and 6.0 m in boreholes dr...

Daily observations from a gridded snow dataset are analyzed for the state of Nebraska from 1900 to 2009, evaluating spatiotemporal variability and trends in snowfall throughout the seasonal cycle. ...

Glacial lake outburst floods (GLOFs) pose an increasing hazard to communities living downstream of glaciated areas of the Northern Patagonia Icefield (NPI). The proliferation of GLOF events poses a...

Rain-on-snow (ROS) flooding is common throughout the Appalachians and Mid-Atlantic region primarily during late winter and spring. Six recent (2007–2013) widespread snowmelt-related flood events th...

Dramatic shifts in sea and terrestrial ice coverage across the Arctic has prompted urgent calls for systematic glacier and ice cap monitoring efforts. We use satellite-derived data from NASA’s Land...

Investigations of Jurassic fluvial architecture in central Utah during a three-month simulated Mars surface expedition have revealed a range of expressions of exhumed and inverted relief. They prov...

This 20-month study of a prairie hillslope seep system builds upon and extends the soil moisture record from a previous study conducted during the most extreme drought ever recorded in Texas. We se...

Till macrofabric and grain-size analysis of glacial diamictons and landforms present in several valleys of the Serra da Estrela Mountains in central Portugal were used to interpret till types and t...

This study investigates the temporal variability and trend of temperature and rainfall in Gelana sub-watershed, northern highlands of Ethiopia. The study employed a mixed methods approach, but over...

The thermal growing season (TGS) that strongly correlates with changes in temperature refers to the whole period during which vegetation growth can occur. The daily mean air temperature data of 66m...

Rainfall associated with Hurricane Maria triggered more than 70,000 shallow landslides over a 6,400 km2 area of Puerto Rico for a mean density of 11.2 slope failures per km2. When compared to other...

Despite its adjacency to seas in the north and the south, Iran suffers from relatively low humidity. Spatial distribution of the atmospheric humidity across Iran is a function of altitude, distance...

Scour is a natural phenomenon involving the removal of bed sediments by the perturbation of flow field with the erection of hydraulic structures such as guide bank, abutments and bridge piers. Remo...

Agriculture in the Aconcagua Basin is both vital to Chile’s economy and critically dependent on water resources from snow and glaciers. Expanding croplands, a growing population, and a changing cli...

ABSTRACT The cumulative effect of anthropogenic aerosol pollution acting primarily as cloud condensation nuclei (CCN) and dust acting as CCN, giant CCN, and ice nuclei (IN) is examined in this study, which covers the entire Colorado Rocky Mountains from the months of October to April in the year 2004–2005. The ~6.5-month analysis provides a range of snowfall totals and variability in concentrations

Using a synoptic classification technique and gridded snow dataset, snowfall was evaluated in the eastern Great Lakes region from 1950-2009 during atmospheric conditions suitable for the developmen...

Physical geographers owe an enormous debt of gratitude to Antony Orme, the founding and long-time editor of Physical Geography. We are the beneficiaries of his vision, initiative, and leadership, a...

ABSTRACT The sky view factor (SVF) is a key indicator in urban structures and is used in research in various fields. Recently, a method was developed to compute SVF in complex urban areas using airborne light detection and ranging (LiDAR). However, it displays low accuracy in areas with trees and buildings, owing to the limited resolution of airborne LiDAR data. In this study, the accuracy of the SVF

ABSTRACT In this study, four kernels extreme learning machines (KELM): radial basis function (RBELM), polynomial (POELM), wavelet (WKELM) and linear (LNELM) extreme learning machines were compared for modelling monthly pan evaporation from Algerian dams reservoirs, according to three scenarios. In the first scenario, the model were developed using splitting ratio of 70/30%, for training and validation

ABSTRACT Landslides represent one of the most frequent geodynamic phenomena in Slovakia. This contribution focuses on the relations of the selected landscape attributes and landslides in flysch area of the Western Carpathians. We presented three statistical methods of assessing and making a prognosis of the landslide hazard: multivariate, factor and zonal analysis. These methods complement each other

ABSTRACT The influence of lithology on morphological variability across space presents a unique approach to understand how morphological variables and domain units respond to lithological variations. This study examines variation existing in channel morphological variables across domain units within a basement complex. Eighty-three reaches were surveyed across six third-order basins within the Upper

ABSTRACT The Mediterranean Sea and the Black Sea comprise a semi-enclosed intercontinental Marine System (MBMS), bordered by the Eurasian and African continents. Its total marine surface is circa 3 × 106 km2, while its drainage basin exceeds 7 × 106 km2; the latter includes the watersheds of 39 large (>104 km2) river systems, which correspond to about 83% of its total area. The MBMS includes four basins

Cover and management (C) and support practice (P) are the most dynamic factors of the Revised Universal Soil Loss Equation- a widely used model to estimate mean annual soil loss. The aim of this st...

ABSTRACT Induced seismicity in the mid-continental United States remains an ongoing concern. In 2016, 4,672 small-magnitude earthquakes occurred in Oklahoma, which now ranks number one for earthquake frequency in the United States. It is thought that this rise in seismicity is related to wastewater disposal (WWD) into Oklahoma’s subsurface near previously inactive faults. Here we model these earthquake

Volcanoes have a beneficial role in human development; however, this balance could turn to hazardous processes or even environmental disturbances. Costa Rica is a volcanic country. The people of Co...

Lake surface water temperature (LSWT) is sensitive to long-term changes in thermal structure of lakes. This paper investigates the association of LSWT with meteorological parameters and its impact ...

ABSTRACT We measured fine sediment accumulations (FSA) adjacent to eroding off-highway vehicle trails in Ouachita National Forest, Arkansas. Measured trailside FSA was 643 m3. Extrapolated to the entire trail network, this amounts to 216 t ha−1 of trail surface, with a residence time of <1 yr. Natural topographic features are the main storage sites, accounting for 83% of the total, and constructed