-
Article
Temporal variability of temperature, precipitation, drought, and their potential influence on horizontal visibility over Saudi Arabia
Changes in the hydrological cycle alter the meteorological variables trend over time, leading to higher extreme events. In this study, the spatial and temporal variability of horizontal visibility (VIS), maxim...
-
Article
Low visibility event prediction using random forest and K-nearest neighbor methods
Low visibility events at King Khalid airport in Riyadh, Saudi Arabia, are investigated using hourly time series of meteorological and air pollution data from April 2015 to December 2017. The analysis of binary...
-
Article
Review of Prosthetic Paravalvular Leaks: Diagnosis and Management
Paravalvular leak (PVL) is a relatively uncommon complication associated with prosthetic valve implantation. PVL can occasionally lead to serious adverse consequences such as congestive heart failure, infectiv...
-
Article
Stream water quality prediction using boosted regression tree and random forest models
Reliable water quality prediction can improve environmental flow monitoring and the sustainability of the stream ecosystem. In this study, we compared two machine learning methods to predict water quality para...
-
Article
Trend and change point detection in mean annual and seasonal maximum temperatures over Saudi Arabia
Spatio-temporal variation associated with temperature can impact water availability and sustainability of the ecosystem. In this study, we investigated the trend and change point occurrences in annual mean of ...
-
Article
Morphological-hydrological relationships and the geomorphological instantaneous unit hydrograph of Makkah Al-Mukarramah watersheds
The present study focused on develo** the predominant relationships between morphological and morphological-hydrological parameters of watersheds in the Makkah Al-Mukarramah region, Kingdom of Saudi Arabia (...
-
Article
Trend analysis and change point detection of annual and seasonal horizontal visibility trends in Saudi Arabia
Horizontal visibility is of utmost importance in climate and air quality studies as it can provide key information related to changes in meteorological conditions, air quality, and their impact on human health...
-
Article
A mechanistic insight into the acid catalyzed, one-pot synthesis of isoindole-fused quinazolin 4-ones
One-pot synthesis of isoindole fused quinazolin 4-ones via intramolecular 1,3 hydride transfer in the presence of acid catalyst has been described. Substrate scope and mechanistic insights were investigated. Subs...
-
Article
Numerical solution of the Saint-Venant equations by an efficient hybrid finite-volume/finite-difference method
A computationally efficient hybrid finite-volume/finite-difference method is proposed for the numerical solution of Saint-Venant equations in one-dimensional open channel flows. The method adopts a mass-conser...
-
Article
Urban and peri-urban precipitation and air temperature trends in mega cities of the world using multiple trend analysis methods
Urbanization plays an important role in altering local to regional climate. In this study, the trends in precipitation and the air temperature were investigated for urban and peri-urban areas of 18 mega cities...
-
Article
1-D coupled non-equilibrium sediment transport modeling for unsteady flows in the discontinuous Galerkin framework
A high-resolution, 1-D numerical model has been developed in the discontinuous Galerkin framework to simulate 1-D flow behavior, sediment transport, and morphological evaluation under unsteady flow conditions....
-
Article
Comparison of BIAS correction techniques for GPCC rainfall data in semi-arid climate
Long-term historical precipitation data are important in develo** metrics for studying the impacts of past hydrologic events (e.g., droughts) on water resources management. Many geographical regions around t...
-
Article
Time step** in discontinuous Galerkin method
The time discretization in the Discontinuous Galerkin (DG) scheme has been traditionally based on the Total Variation Diminishing (TVD) second-order Runge-Kutta (RK2) scheme. Computational efficiency and accur...
-
Article
Modeling Dam-Break Flood Over Natural Rivers Using Discontinuous Galerkin Method
A well-balanced numerical model is presented for two-dimensional, depth-averaged, shallow water flows based on the Discontinuous Galerkin (DG) method. The model is applied to simulate dam-break flood in natura...
-
Article
The Merging of Two Unequal Axisymmetric Parallel Turbulent Jets
Results of an experimental study of the merging of unequal parallel round turbulent jets are presented. Experiments were conducted for a jet axial separation to nozzle diameter ratio of 3.0 and the Reynolds nu...
