Search Results

You are looking at 31 - 40 of 189 items for :

  • Journal of Hydrometeorology x
  • Refine by Access: All Content x
Clear All
Nikolaos S. Bartsotas, Efthymios I. Nikolopoulos, Emmanouil N. Anagnostou, Stavros Solomos, and George Kallos

response of the Sesia River basin is a simple spatially distributed hydrologic model [Kinematic Local Excess Model (KLEM)], which has been previously used in several flash flood studies in the same area ( Sangati et al. 2009 ) as well as other similar mountainous regions ( Borga et al. 2007 ; Zoccatelli et al. 2011 ). The distributed model is based on availability of spatially distributed information on land surface properties (topography, soil type, and land use/cover). Runoff generation within the

Full access
J.-D. Creutin, E. Leblois, and J.-M. Lepioufle

precipitation separating de facto two scales of kinematics. The “large scale” movement of precipitation systems is often clearly visible on radar animations and used as such for short-term precipitation forecasting (see, e.g., Austin and Bellon 1974 ; Bowler et al. 2004 ). It can be mathematically formulated between instants t 1 and t 2 as , where is the space vector maximizing the ACF . This large-scale movement allows one to distinguish the rainfall variability seen from a coordinate system

Full access
Long Yang, James Smith, Mary Lynn Baeck, Efrat Morin, and David C. Goodrich

/semiarid watersheds? We examine these questions based on empirical analyses of observations from the Weather Surveillance Radar-1988 Doppler (WSR-88D) radar at Phoenix, high-resolution (15 min) rain gauge observations, and direct/indirect stream gauging records. Storm-tracking algorithms will be used to characterize the Lagrangian properties of flood-producing storms. We further examine the flood response of the 19 August 2014 storm based on hydrological modeling analyses using the Kinematic Runoff and Erosion

Full access
William P. Kustas, John H. Prueger, J. Ian MacPherson, Mengistu Wolde, and Fuqin Li

estimate with Eq. (3) is certainly closer to aircraft-based value resulting in a ratio of 〈 z o 〉 EQ5 /〈 z o 〉 EQ3 ≈ 1.5. The fact that aggregation of the roughness values is less than the aircraft-based estimates suggests that the interactions of neighboring roughness areas play a significant role in the effective roughness for this landscape. Interspacing of the corn- and soybean fields as well as roads/right of ways are likely to induce additional kinematic stress via additional form drag and

Full access
Ju-Mee Ryoo, Sen Chiao, J. Ryan Spackman, Laura T. Iraci, F. Martin Ralph, Andrew Martin, Randall M. Dole, Josette E. Marrero, Emma L. Yates, T. Paul Bui, Jonathan M. Dean-Day, and Cecilia S. Chang

). Fig . 6. Time series of (red) observed and (blue) modeled (a) wind speed at BBY, (b) precipitation over BBY (coastal region), (c) precipitation over CZD (mountain region), and (d) rain ratio (CZD/BBY) from 1800 UTC 10 Mar to 0000 UTC 12 Mar 2016. Observed wind data is only available over BBY from the wind profiler. 4. Characteristics of TTAs simulated from WRF-ARW a. Kinematic characteristic of TTAs To further understand the detailed kinematic structure and characteristics of TTAs in conjunction

Free access
F. C. Sperna Weiland, L. P. H. van Beek, J. C. J. Kwadijk, and M. F. P. Bierkens

network. The drainage network is based on the 30′ global drainage direction map (DDM30) dataset and has a vertical resolution of 0.5° ( Döll and Lehner 2002 ). 2) Routing of total runoff (MRRO) Within this method, cell-specific total runoff (MRRO) is accumulated for each individual time step and, as an extension of the above method, routed along a drainage network using the kinematic wave equation. The drainage network is based on DDM30 and has a vertical resolution of 0.5° ( Döll and Lehner 2002

Full access
T. Vischel, G. Quantin, T. Lebel, J. Viarre, M. Gosset, F. Cazenave, and G. Panthou

Sahelian band. Very few studies dealing with rainfall interpolation at subdaily time scales incorporate information about the rain kinematics ( Amani and Lebel 1997 ; Cheng et al. 2007 ; Spadavecchia and Williams 2009 ). Most interpolation methods process each time step independently, neglecting to take into account the valuable information contained in the time autocorrelation of rain fields (e.g. Tsanis et al. 2002 ; Haberlandt 2007 ; Tao et al. 2009 ). Several studies have shown the importance

Full access
Christa D. Peters-Lidard and Luke H. Davis

neglecting molecular diffusion, sources and sinks, 1 and horizontal flux divergence. In addition, the horizontal x coordinate is aligned with the mean wind and the temperature gradient is assumed to be in the same direction. The simplified conservation-of-heat equation is where t is time; θ is potential temperature; u and w are the horizontal and vertical wind components, respectively; z is the vertical coordinate; and w ′ θ ′ is the kinematic heat flux. The conservation

Full access
Augusto C. V. Getirana, Aaron Boone, Dai Yamazaki, Bertrand Decharme, Fabrice Papa, and Nelly Mognard

time. Recent studies have improved the parameterization of FRS by considering the flow routing at the subgrid scale using linear reservoirs; flow routing between grid cells based on simplified formulations of the Saint–Venant equations, such as the kinematic and diffusive wave equations; interactions between rivers and floodplains; and evaporation from open waters ( Döll et al. 2003 ; Decharme et al. 2012 ; Yamazaki et al. 2011 ). Also, recent advances in data availability, resolution, and

Full access
John L. Williams III and Reed M. Maxwell

which model component handles the subsurface, land surface, and atmosphere. ParFlow simulates flow in the subsurface by solving the Richards equation in three spatial dimensions with integrated surface flow routing using the kinematic wave approximation of the shallow water equations. The connection to evapotranspiration (ET) is simulated through moisture stress functions that limit the actual ET against potential ET. Additional details of ParFlow’s governing equations and the connections with the

Full access