This paper presents the effects of two-dimensional bathymetry on evolution skewness and kurtosis surface elevation velocity field in long-crested irregular waves propagating over a circular shoal submerged bar with semicircular step. For shoal, we show that has local maximum top shoal. We find horizontal similar behaviour to elevation, but two maxima at different locations lee side step, which ...

Dynamical assimilation of surface elevation from tide gauges is investigated to estimate the bottom drag coefficient and surface stress as a first step in improving modeled tidal and wind-driven circulation in the Chesapeake Bay. A two-dimensional shallow water model and an adjoint variational method with a limited memory quasi-Newton optimization algorithm are used to achieve this goal. Assimi...

Generation of elevation maps of the seafloor is an important component of any autonomous system designed to navigate underwater. Because of its long range, sonar is the sensing medium of choice for underwater navigation. However, sonar systems designed to directly generate 3D images are generally complex or have low resolution. For these reasons, techniques that generate 3D elevation maps from ...

The Salton Sea of California lying below sea level in a dcscrt basin, serves as a sump for irrigation water diverted from the Colorado River. The present Sea reached its maximum size and highest surface elevation at the time of its formation in 1907. Due to evaporation at the rate of six feet per year the surface elevation fell from -195 feet to its minimum of -240 feet in 1948, the surface are...

Incoming solar radiation (insolation) is fundamental to most physical and biophysical processes because of its role in energy and water balance. We calculated insolation maps from digital elevation models, using an insolation model that accounts for atmospheric conditions, elevation, surface orientation, and influences of surrounding topography. Herein, we focus on the application of this insol...

In this study we evaluate whether the methodology of Boosted Regression Trees (BRT) suits for accurately predicting maximum wind speeds. As predictors a broad set of parameters derived from a Digital Elevation Model (DEM) acquired within the Shuttle Radar Topography Mission (SRTM) is used. The derived parameters describe the surface by means of quantities (e.g. slope, aspect) and quality (landf...

Induction of hyperbilirubinemia in experimental rabbits by phenylhydrazine was optimized in terms of dose, dose interval and number of doses using response surface methodology. Central Composite Design was employed using five levels for each of the three input variables. Degree of hyperbilirubinemia was measured in terms of bilirubin level in serum of animals. A dose dependent significant eleva...