Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 1561-1580 of 3826
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Field Calibration of Weirs Using Partial Volumetric Flow Measurements
(American Society of Civil Engineers, 2012)A simple and low-cost flow-measurement method for the field calibration of weirs is described. With this method, accurate estimations of the flow rate over a weir can be made on the basis of volumetric flow measurements ... -
Groundwater Mound due to Artificial Recharge from Rectangular Areas
(American Society of Civil Engineers, 2012)The suitability of the widely used existing solution for calculating groundwater mound due to artificial recharge from rectangular areas is examined for its applicability to unconfined aquifers, and this solution has been ... -
Assessing Irrigation Water Capacity of Land Use Change in a Data-Scarce Watershed of Korea
(American Society of Civil Engineers, 2012)The objective of this study is to assess stable irrigation water capacity and erosion on the basis of water and sediment balance analysis of land use change. The reservoir water balance analysis is calculated by the daily ... -
New Analytical Solution to Water Content Simulation in Porous Media
(American Society of Civil Engineers, 2012)The nonlinear advection-diffusion equation, also known as Richard’s equation, is one of the most famous equations expressing water content in unsaturated porous media with broad applications in hydrology, engineering, and ... -
Comparison of Laboratory and Field Calibration of a Soil-Moisture Capacitance Probe for Various Soils
(American Society of Civil Engineers, 2012)Throughout the American west, irrigated agriculture has been targeted to increase water-use efficiency because of increased urban demands. Soil-moisture sensors offer a method to achieve efficiency improvements, but have ... -
Simulation Study on the Influence of Roughness on the Downstream Automatic Control of an Irrigation Canal
(American Society of Civil Engineers, 2012)The controllability of an irrigation canal depends on its physical characteristics, on the control algorithm used, and on the actual condition of the canal in relation to the algorithm tuning conditions. The flow conditions ... -
Usefulness of Empirical Equations in Assessing Canal Losses through Seepage in Concrete-Lined Canal
(American Society of Civil Engineers, 2012)The correct estimation of conveyance water losses from an irrigation system is vital for the proper management for the system. Seepage is the most dominant process by which water is lost in the canal. Thus, for the effective ... -
Shape Factors for Elements of the Infiltration Profile in Surface Irrigation: Generic Approach
(American Society of Civil Engineers, 2012)Advanced mathematical models of surface irrigation use the equations of motion applied to a series of cells comprising the surface stream and an infiltration profile. In the simulation, a mass balance must be preserved ... -
Storm-Water Quality Control Basin with Micropool
(American Society of Civil Engineers, 2012)Since the early 1990s, a water quality capture volume (WQCV) has been recommended for stormwater quality enhancement designs. However, lacking further guidance on how to shape the basin for this recommended volume, the ... -
Regional Assessment of Soil Water Salinity across an Intensively Irrigated River Valley
(American Society of Civil Engineers, 2012)Extensive field investigations allowed depiction of soil water salinity within two large representative regions of a river valley that has been irrigated for more than 120 years. The nature and severity of the salinity ... -
Raindrop Size Distribution and Soil Erosion
(American Society of Civil Engineers, 2012)Soil erosion is caused, at least in part, by the effect of kinetic energy on the soil during rainfall. Therefore, a better knowledge of rain parameters is useful. To assess the influence of rain on the amount of soil loss, ... -
ET Mapping with High-Resolution Airborne Remote Sensing Data in an Advective Semiarid Environment
(American Society of Civil Engineers, 2012)Accurate estimates of spatially distributed evapotranspiration (ET) are essential for managing water in irrigated regions and for hydrologic modeling. METRIC (Mapping ET at high Resolutions with Internal Calibration) energy ... -
Using Cluster Analysis of Hydraulic Conductivity Realizations to Reduce Computational Time for Monte Carlo Simulations
(American Society of Civil Engineers, 2012)Despite the conceptual simplicity of Monte Carlo-simulation methods in assessing uncertainty in hydrogeological systems, their use is limited by expensive computational requirements in terms of the large number of realizations ... -
Momentum Considerations in Hydraulic Jumps and Bores
(American Society of Civil Engineers, 2012)A hydraulic jump is the turbulent transition from a high velocity into a slower flow. A related process is the hydraulic jump in translation. The application of the equations of conservation of mass and momentum in their ... -
Graphical Calculation of Small Catchment Peak Discharge
(American Society of Civil Engineers, 2012)A graphical procedure for calculating peak discharge from small catchments is developed on the basis of the standard Natural Resources Conservation Service (NRCS) rainfall-runoff hydrologic methods, in which rainfall excess ... -
Comparison of Methods to Estimate Saturated Hydraulic Conductivity in Texas Soils with Grass
(American Society of Civil Engineers, 2012)One of the primary objectives for irrigation and drainage engineers, soil physicists, and hydrologists is to develop effective methods to estimate soil saturated hydraulic conductivity on the basis of readily available ... -
Cap-Orifice as a Flow Regulator for Rain Garden Design
(American Society of Civil Engineers, 2012)Rain gardens have been recognized as an effective device for on-site runoff volume reduction and storm water quality enhancement. A rain garden is designed as an infiltration basin with a shallow, wide water storage volume. ... -
Application of Artificial Neural Network to Predict TDS in Talkheh Rud River
(American Society of Civil Engineers, 2012)Salinity ranks high among the list of parameters which demand attention during the planning and management of water quality, particularly for drinking and irrigation. If water quality is adequately predicted, then the ... -
New Theoretical Solution of the Stage-Discharge Relationship for Sharp-Crested and Broad Weirs
(American Society of Civil Engineers, 2012)In this paper, the outflow process of a sharp-crested and broad weir is studied using the dimensional analysis and the incomplete self-similarity theory. The new stage discharge is theoretically deduced and its testing is ... -
Storm-Water Management through Infiltration Trenches
(American Society of Civil Engineers, 2012)With urbanization, the permeable soil surface area through which recharge by infiltration can occur is reducing. This is resulting in much less ground-water recharge and greatly increased surface run-off. Infiltration ...