A methodology for maximum precipitation (MP) estimation that uses a physically based numerical atmospheric model is proposed in this paper. As case study, the model-based 72-h MP was estimated American River watershed (ARW) California December 1996–January 1997 flood event. First, regional model, MM5, calibrated and validated historical major storm event ARW, on basis of U.S. National Center Atmospheric Research (NCAR) reanalysis data to demonstrate capability during period. Then,...

The Watershed Environmental Hydrology model presents a new approach to the modeling of hydrologic processes in order account for effect heterogeneity within natural watersheds. Toward this purpose, point location–scale conservation equations various were upscaled obtain their ensemble averaged forms at scale computational grid areas. Over hillslopes these areas correspond along complete transect hillslope. resulting equations, although they are fundamentally one-dimensional, have lateral...

Maximum precipitation during a historical period is estimated by means of physically based regional atmospheric model over three watersheds in Northern California: the American River watershed (ARW), Yuba (YRW), and Upper Feather (UFRW). In California, severe storm events are mostly caused high-moisture flow from Pacific Ocean, referred to as river (AR). Therefore, method maximize contribution an AR on each targeted proposed. The shifts boundary conditions space with latitude longitude so...

Arctic lakes located in permafrost regions are susceptible to catastrophic drainage. In this study, we reconstructed historical lake drainage events on the western Coastal Plain of Alaska between 1955 and 2017 using USGS topographic maps, aerial photography (1955), Landsat Imagery (ca. 1975, ca. 2000, annually since 2000). We identified 98 larger than 10 ha that partially (>25% area) or completely drained during 62-year period. Decadal-scale rates progressively declined from 2.0 lakes/yr...

Maximum precipitation (MP) was estimated by means of a regional atmospheric model over three watersheds in northern California [(1) the American River watershed (ARW), (2) Yuba (YRW), and (3) Upper Feather (UFRW)], based on reconstruction analyses historical severe storms that were recorded these target watersheds, where National Centers for Environmental Prediction (NCEP)/National Center Atmospheric Research (NCAR) reanalysis data available modeling storms. Since storm events are mainly...

Abstract Threshold wind speed for snow movement is one of the most important parameters describing wind‐transport process. A majority previous studies used empirical and constant threshold speeds while variations atmosphere condition age seem to greatly affect settlement This study tested hypothesis that transport increases as deposition time passed since last snowfall by introducing a new formula movement. It was theoretically derived based on sintering process modeling moment balance...

Abstract In subalpine watersheds of the intermountain western United States, snowpack melt is dominant water input to hydrologic system. The primary focus this work understand partitioning from during snowmelt period and through remainder growing season. We conducted a time‐lapse electrical resistivity tomography (ERT) study in conjunction with budget analysis track snow‐on snow‐off season (May–August 2015). Seismic velocities provided an estimate regolith thickness while transpiration...

Abstract Lakes and drained lake basins (DLBs) together cover up to ∼80% of the western Arctic Coastal Plain Alaska. The formation drainage lakes in this continuous permafrost region drive spatial temporal landscape dynamics. Postdrainage processes including vegetation succession aggradation have implications for hydrology, carbon cycling, evolution. Here, we used surface nuclear magnetic resonance (NMR) transient electromagnetic (TEM) measurements conjunction with thermal modeling...

A newly developed watershed environmental hydrology (WEHY) model is presented as a state-of-the-art nonpoint source (NPS) model. The consists of hydrologic and modules, describes environmentally relevant processes based upon physically governing equations to the fate pollutants such sediment phosphorus in watershed. Unlike other NPS models, WEHY unique its upscaling approach processes, which results that are compatible with computational grid resolution while accounting for subgrid...

The future projections of climate change by means global models the Earth provide fundamental coarse-grid-resolution hydroclimate data for studies effect on water resources. This paper reports a study that was performed during 2001–2006, in which simulations coupled model Canadian Center Climate Modeling and Analysis were downscaled regional Peninsular Malaysia (RegHCM-PM) to scale subregions watersheds (PM), assess its On basis hydroclimatic conditions historical period 1984–1993 periods...

Among the key problems in atmospheric and hydrologic sciences are modeling of interaction between atmosphere land surface hydrology while also quantifying surface/subsurface flow processes both vertical lateral directions, heterogeneity subsurface processes. Meanwhile, standard water resources engineering practice, planning management is performed over geographical region a watershed. To address these issues, model coupled atmospheric-hydrologic at watershed scale, Watershed Environmental...

Abstract The warming of the Earth's atmosphere system is likely to change temperature and precipitation, which may affect climate, hydrology water resources at river basins over world. importance becomes even greater in snow or glacier dominated where it controls snowmelt processes during late‐winter, spring summer months. In this study hydrologic responses streamflow Pyanj Vaksh River climate are analysed with a watershed model, based on downscaled atmospheric data as input, order assess...

The objective of this study is to evaluate the potential Watershed Environmental Hydrology Hydro-Climate Model (WEHY-HCM) for modeling runoff at ungauged or sparsely gauged watersheds. WEHY-HCM employs an atmospheric module (fifth generation mesoscale model, MM5) that coupled with its process-based watershed environmental hydrology (WEHY) module. In component was utilized dynamical downscaling coarse U.S. National Center Prediction/National Atmospheric Research (NCEP/NCAR) historical global...

Abstract Snowdrifts formed by wind transported snow deposition represent a vital component of the earth surface processes on Arctic tundra. Snow accumulation steep slopes particularly at margins rivers, coasts, lakes, and drained lake basins (DLBs) comprise significant water storage for ecosystem during spring summer snowmelt. The tundra landscape is in constant change as lakes drain, substantially altering morphology that partially controls how drifts accumulates throughout cold seasons....

Although the importance of subgrid variability in snow model has been recognized, only a few modeling studies on parameterization effects have performed. This study proposes new upscaling approach from single-layered point-scale toward finite-scale model, using probability density functions (PDF). The Fokker-Planck equation (FPE) for snowmelt process is formulated two-dimensional domain temperature versus depth. equation, governing evolution temperature–snow depth bivariate state variable,...

To establish a basinwide water management plan for the Tigris-Euphrates (TE) watershed, it is necessary to perform rigorous balance studies of whole watershed—at least critical historical drought and flood conditions under various resources development scenarios. Water-balance over watershed require climatic hydrologic data sets, corresponding periods, at fine time spatial grid resolutions provide hydroclimatic information. The Regional Hydroclimate Model (RegHCM-TE) associated geographic...

Abstract Climate change due to global warming is a public concern in Central Asia. Because of specific orography and climate conditions, the republic Tajikistan considered as main glacial center In this study, regional impacts two large basins Tajikistan, Pyanj Vaksh River located upstream sector Amu Darya basin are analysed. A statistical regression method with model output statistics corrections using ground observation data, Willmott archived dataset GSMaP satellite driven dataset, was...

Abstract It is well known that snow plays an important role in land surface energy balance; however, modelling the subgrid variability of still a challenge large‐scale hydrological and models. High‐resolution depth data statistical methods can reveal some characteristics depth, which be useful developing models for representing such variability. In this study, was measured by airborne Lidar at 0.5‐m resolution over two mountainous areas south‐western Wyoming, Snowy Range Laramie Range. To...