Showing papers in "Journal of Hydro-environment Research in 2014"

TL;DR: In this paper, a new expression of longitudinal dispersion coefficient, which is a combination of the product of HU and other two non-dimensional hydraulic and geometric parameters, was deduced and the exponents were determined by the regression analysis.

TL;DR: In this paper, the authors present an experiment and numerical simulations of dam-break flood wave in an initially dry flume with a hump, where a triangular-shaped bottom obstacle was placed downstream the dam site in the channel to provide the effects of both bottom slope and abrupt change in topography on propagation of dam break flood waves.

TL;DR: In this paper, the combined effects of a sea embankment and a coastal forest were analyzed using post-tsunami survey data of the damage and a nonlinear long wave equation model that includes the breaking or washout condition of trees.

TL;DR: In this article, a physical-scale model of the Big Sioux River with engineered log jams is presented and discussed, and the experimental results show that ELJ designs greatly decelerate flow near the structure and accelerate flow in the main portion of the channel, yet spatially averaged flow velocity and depth remain unchanged.

TL;DR: In this article, the effect of climate change on runoff in southeast Korea using the TANK conceptual rainfall-runoff model was assessed using the indicators of hydrological alteration (IHA) developed by U.S. Nature Conservancy.

TL;DR: In this article, the authors used a depth integrated hydrodynamic-dispersion model to predict the distribution of the tidal wave amplitude and salinity level in the Pearl River Estuary (PRE).

TL;DR: In this article, a three dimensional (3D) dynamic Environmental Fluid Dynamics Code (EFDC) model was used to simulate hydrodynamic and algal processes for Miyun reservoir.

TL;DR: In this article, two sets of data, original and synthetic datasets, were collected from numerous historical dam failures and generated by copula method after incorporating the dependence structure among effective variables (height and volume of water behind the dam at failure and peak outflow discharge).

TL;DR: A geochemical study using hydrochemical techniques and multivariate statistical analysis were undertaken to characterize shallow waters in southwestern Tunisia as discussed by the authors, and the results indicated that groundwater quality depended mainly on the dissolution of some evaporite minerals in the oasis shallow aquifers and the Saharan shallow waters with TDS > 2.2.

TL;DR: In this article, the impacts and uncertainty associated with climate change on water resources in the Geumho River Basin were measured based on the relative change in the mean annual runoff and the aridity index.

TL;DR: In this paper, the k-e model was used to improve the ability of the shallow water equations (SWEs) model to capture the flow turbulence, and the numerical simulations were compared with the measured data in the flow velocity, TKE and power spectrum.

TL;DR: In this article, the effectiveness of emergent vegetation in an open channel for the removal of Total Suspended Solids (TSS) and turbidity is empirically investigated and the response surface methodology (RSM) was applied to optimize three variables of vegetated channel including flow velocity at the entrance, density of vegetation, and the length of vegetation zone.

TL;DR: Wang et al. as mentioned in this paper investigated the temporal trends of historical reservoir inflow series during refill period by the methods of linear regression, Mann-Kendall and Spearman's rho test.

TL;DR: In this paper, the turbulent structure of open-channel flows over two-dimensional dunes is investigated numerically using large-eddy simulation (LES), in order to improve our understanding of the interaction between the dune-generated turbulence and the free surface dynamics.

TL;DR: In this article, the authors presented an application of risk and uncertainty analysis to dam overtopping for Doroudzan Reservoir located at the south part of Iran and demonstrated that both increasing water level and wind speed have significant impact on the risk of overflowing.

TL;DR: In this paper, a mathematical sand particle can be represented mathematically by a Fourier series that can simulate the shape and size of real particles, and the distribution of phosphorus on the surface of mathematical sand particles was proposed based on the statistical results of measured particle's surface element distribution.

TL;DR: In this paper, the authors investigate the local morphological effects resulting at the intake section of a longitudinal training dam, where the flow is distributed over the main channel and a side channel in between the dam and the river shore.

TL;DR: In this article, a movable bed model was designed in a laboratory flume to simulate a mixed load sand-bed stream, which contained an exact geometric scale and graded lightweight sediments to simulate migrating dunes and suspended load transport.

TL;DR: In this paper, the Shiono and Knight (SKM) quasi 2D mathematical model has been numerically solved for discharge prediction of compound weirs, based on the assumption of flow similarity between compound sharp crested weirs and compound open channels.

TL;DR: Application results show that the proposed coupled model is beneficial in decision making process to design structural components in near future and prepare long-term policies for water shortage and water right issues in upcoming years.

TL;DR: In this article, the influence of bed roughness, flow velocity and suspension height on the grain-size distribution in suspension was investigated and an empirical equation for the proportionality parameter βn has been proposed, which is the ratio of sediment diffusion coefficient to the momentum diffusion coefficient of the nth grain size class.

TL;DR: In this paper, a long flume experiment was conducted with a natural bimodal mixture to investigate the relation between bed recharge and the magnitude of erosion events, and the results showed that transported volumes were related to the degree of bed recharge only.

TL;DR: In this paper, a 2D mobile-bed model called the explicit finite analytic model (EFA) is proposed to simulate morphological changes for mountain rivers, which considers both incision and deposition over the bedrock, by combining a new stream power type of bedrock erosion rate formula with the flow and sediment transport modules.

TL;DR: In this paper, the authors proposed methods for calculating both hydrological and channel-geomorphic-unit diversity as factors that represent the health of a habitat based on a modified Shannon diversity index.

TL;DR: A multipurpose, single-reservoir operation model is developed by assuming triangular fuzzy-number distribution of the parameters, which is demonstrated through the case study of the Jayakwadi reservoir stage II, Maharashtra State, India.

TL;DR: In this paper, the authors defined the persistence of a system as the ability of a disturbed system to resist, buffer the effects of variable disturbances and return to accepted level of performance after disturbances and introduced a framework to evaluate the concept of risk management persistence for urban drainage systems based on joint consideration of resilience and resistance standpoints.

TL;DR: In this article, the effects of eddy viscosity variation on lateral distribution of velocity profile were also investigated and discussed and a very good qualitative agreement was achieved between numerical results and measurement data for both velocity and flow depth of all experimental data sets in general.

TL;DR: In this article, an experimental study has been carried out to investigate the behavior of solute transport through fractured-porous media, where a single fracture is created in middle of the clay matrix in flow direction.

TL;DR: In this paper, four distinct gravel and sand sediments were armored under three different flow rates, and 134 clusters were identified on nine different armored beds and two basic types of cluster morphology produced very different effects on turbulent channel flows.

TL;DR: In this article, a case study of restoration of a flow gauging station namely Pontneddfechan located in South West Wales, UK is presented, where the hydraulic conditions of the weir considering the opportunities for fish passage while still retaining the accuracy of flow measurement.