Now showing items 1-20 of 57

    • Analysis of Gradual Earth-Dam Failure 

      Scarlatos, Panagiotis D.; Singh, Vijay P. (1988-01-01)
      Analytical models are developed for the simulation of earth-dam breach erosion. Using a reservoir water-mass depletion equation, broad-crested weir hydraulics and a breach-erosion relation, solutions ae derived for ...
    • Analysis of Nonlinear Muskingum Flood Routing 

      Scarlatos, Panagiotis D.; Singh, Vijay P. (1987-01-01)
      The three-parameter nonlinear Muskingum method for flood routing is analyzed. Analytical solutions for simplifying cases and approximate integral solutions for general cases are derived. Its accuracy depends mainly on the ...
    • Analysis of Soil Water Retention Data Using Artificial Neural Networks 

      Genuchten, M. Th. van; Jain, Sharad K.; Singh, Vijay P. (2004-09-05)
      Many studies of water flow and solute transport in the vadose zone require estimates of the unsaturated soil hydraulic properties, including the soil water retention curve (WRC) describing the relationship between soil ...
    • ANN and Fuzzy Logic Models for Simulating Event-Based Rainfall-Runoff 

      Singh, Vijay P.; Tayfur, Gokmen (2006-12-01)
      This study presents the development of artificial neural network _ANN_ and fuzzy logic _FL_ models for predicting event-based rainfall runoff and tests these models against the kinematic wave approximation _KWA_. A three-layer ...
    • Application of Kinematic Wave Equations to Border Irrigation Design 

      Ram, Rama S.; Singh, Vijay P. (The British Society for Research in Agricultural Engineering, 1985)
      Accuracy of the kinematic wave (KW) approximation was tested on 31 experimental irrigation borders by computing the KW number and its modified version. In a majority of cases. This approximation was found to be sufficiently ...
    • Bivariate Drought Analysis Using Streamflow Reconstruction with Tree Ring Indices in the Sacramento Basin, California, USA 

      Kwak, Jaewon; Kim, Soojun; Kim, Gilho; Singh, Vijay P.; Park, Jungsool; Kim, Hung Soo (2016-03-30)
      Long-term streamflow data are vital for analysis of hydrological droughts. Using an artificial neural network (ANN) model and nine tree-ring indices, this study reconstructed the annual streamflow of the Sacramento River ...
    • Bivariate Rainfall and Runoff Analysis Using Entropy and Copula Theories 

      Singh, Vijay P.; Zhang, Lan (2012-09-24)
      Multivariate hydrologic frequency analysis has been widely studied using: (1) commonly known joint distributions or copula functions with the assumption of univariate variables being independently identically distributed ...
    • Case Study: Finite Element Method and Artificial Neural Network Models for Flow through Jeziorsko Earthfill Dam in Poland 

      Singh, Vijay P.; Swiatek, Dorota; Tayfur, Gokmen; Wita, Andrew (2005-06-01)
      A finite element method (FEM) and an artificial neural network (ANN) model were developed to simulate flow through Jeziorsko earthfill dam in Poland. The developed FEM is capable of simulating two-dimensional unsteady and ...
    • Case Study: Influence of Morphological Changes on Flooding in Jingjiang River 

      Fan, Ping; Li, J. C.; Liu, Q. Q.; Singh, V. P. (2008-12-01)
      The middle reach of the Yangtze River, customarily called the Jingjiang River, together with its diversion channels and Dongting Lake, form a large complicated drainage system. In the last five decades, significant ...
    • Cistern Project for Domestic Water use in Semi-Arid Regions 

      Pruski, Fernando Falco; Rodriguez, Renata Del Giudice; Singh, Vijay P. (International Journal of Engineering Research and Technology, 2016-03-03)
      Water scarcity in semi-arid regions compromises the quality of life, principally human health, in these regions. The use of cisterns with adequate dimensions, that ensure the minimum of water required to meet human needs, ...
    • Demarcation of Prospective Groundwater Recharge Zones in Hard Rock Area from Southern India 

      Mondal, Nepal C.; Sankaran, Somayaji; Singh, Vijay P. (Academic Journals, 2011)
      In semi-arid regions, particularly in hard rock areas (Southern India), shallow aquifers are a major source of potable groundwater. These aquifers are indiscriminately exploited to meet the growing demand of water for ...
    • Derivation of 2D Power-Law Velocity Distribution Using Entropy Theory 

      Fontana, Nicola; Marini, Gustavo; Singh, Vijay P. (2013-04-08)
      The one-dimensional (1D) power law velocity distribution, commonly used for computing velocities in open channel flow, has been derived empirically. However, a multitude of problems, such as scour around bridge piers, ...
    • Derivation of Furrow Geometry Using Entropy Theory 

      Singh, V. P. (American Society of Agricultural and Biological Engineers, 2012)
      The instantaneous unit hydrograph (IUH) is a commonly used method for computing surface runoff hydrographs from small watersheds. Assuming travel time as a random variable, a general equation for IUH is derived using the ...
    • Derivation of Rating Curves Using Entropy Theory 

      Singh, V. P. (American Society of Agricultural and Biological Engineers, 2010)
      Using the entropy theory, this study derives the stage‐discharge relation, often called the rating curve, which is based on two simple constraints: (1) the total probability and (2) the mean logarithmic discharge. Parameters ...
    • Determination of Critical Head in Soil Piping 

      Adrian, D. D.; Ojha, C. S. P.; Singh, V. P. (2003-07-01)
      One of the main mechanisms of failure of levees is a phenomenon called ‘‘piping,’’ which generally begins with the formation of a sand boil at the leeward side of the levee, and has been frequently observed to proceed ...
    • Dimensionless analytical solutions for dam-breach erosion 

      Quiroga, C. A.; Singh, V. P. (2010-01-19)
      The earthen dam breach erosion is analyzed using dimensionless analytical solutions, with rectangular and triangular representations for the breach section. Data for the historical failures of South Fork and Teton Dams are ...
    • Dispersion Model for Varying Vertical Shear in Vegetated Channels 

      Patil, S.; Singh, V. P. (2011-10-01)
      A dispersion model for a wide range of depthwise vertical shear is derived by using perturbation analysis and power (m) law velocity profile. For m = 1, the velocity profile provides linear shear, whereas m > 1 provides ...
    • Empirical Bed Load Transport Equations 

      Afzalimehr, Hossein; Azareh, Sahar; Poorhosein, Mehrdad; Singh, Vijay P.; Sui, Jueyi (2014)
      Bed load transport is of fundamental importance in river engineering. Although there are many bed load transport equations, there is still no consensus on which equation is the best and how to select a particular equation ...
    • Entropy approach for 2D velocity distribution in open-channel flow 

      Fiorentino, Mauro; Fontana, Nicola; Marini, Gustavo; De Martino, Giuseppe; Singh, Vijay P. (2011-11-21)
      In this paper, considering time-averaged velocity as a random variable, two-dimensional (2D) velocity distributions in open-channel flow have been derived based on the Shannon entropy concept and the principle of maximum ...
    • Entropy Spectral Analyses for Groundwater Forecasting 

      Cui, Huijaun; Singh, Vijay P. (2017-03-03)
      Forecasting of monthly and annual groundwater levels is important for water resources management, irrigation, and assessment of climate change. This study employs entropy spectral analysis for forecasting monthly groundwater ...