Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 1941-1960 of 3826
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Closure to “Optimizing Aquifer Parameters from Drawdowns in Large Diameter Wells” by Sushil K. Singh
(American Society of Civil Engineers, 2009) -
Soil Moisture Measurements: Comparison of Instrumentation Performances
(American Society of Civil Engineers, 2010)It has long been recognized that reliable, robust, and automated instrumentation for the measurement of soil moisture content can be extremely useful, if not essential, in hydrological, environmental, and agricultural ... -
Kernel Method for Transient Rate and Volume of Well Discharge under Constant Drawdown
(American Society of Civil Engineers, 2009)A kernel method is proposed for calculating transient rate and cumulative volume of well discharge under constant drawdown. The new method can also be used for obtaining the drawdown (in pressure head) in the aquifer at ... -
Retention of Sediment and Nutrient Loads with Peak Runoff Control
(American Society of Civil Engineers, 2009)The purpose of this research was to evaluate peak runoff control as a water protection method to reduce sediment and nutrient loads. Increased eutrophication of surface waters and risk of floods demands cost effective ... -
Mathematical Formulations of NRCS 24-Hour Design Storms
(American Society of Civil Engineers, 2009)Four standard design storms (called Types 1, 1A, 2, and 3) developed by the National Resource Conservation Service (NRCS) are used widely throughout the United States for hydrological design of flood control structures and ... -
Least-Cost and Most Efficient Channel Cross Sections
(American Society of Civil Engineers, 2009)It has been a long-standing concern to decide if a channel should be designed to have the highest hydraulic efficiency or the least cost. In this study, a large amount of channel construction costs were reviewed and analyzed ... -
Drawdown due to Temporally Varying Pumping Discharge: Inversely Estimating Aquifer Parameters
(American Society of Civil Engineers, 2009)A ramp kernel method is proposed for accurately calculating the drawdown due to any temporal variation in pumping discharge. The use of the ramp kernels assumes the linear variation between the two consecutive measured ... -
Noise Reduction Methods for Weighing Lysimeters
(American Society of Civil Engineers, 2009)Mechanical vibration of the grass and crop weighing lysimeters, located at the University of California West Side Field Research and Extension Station at Five Points, Calif. generated noise in lysimeter mass measurements ... -
Performance of a Bioretention Area and a Level Spreader-Grass Filter Strip at Two Highway Sites in North Carolina
(American Society of Civil Engineers, 2009)The pollutant removal efficiency of a bioretention area and a level spreader-grass filter strip implemented at North Carolina highway facilities was assessed. The assessment consisted of monitoring inflow, outflow, and ... -
Hydraulic Efficiency of Continuous Transverse Grates for Paved Areas
(American Society of Civil Engineers, 2009)The hydraulic behavior of several continuous transverse gully grates is studied. Their use is common in some urban or impervious areas (squares, airport pavements, parks, pedestrian areas, etc.) where isolated inlets turn ... -
Prediction of the Asymptotic Water Depth in Rough Compound Channels
(American Society of Civil Engineers, 2009)We report on a curious result related to the computation of the asymptotic depth in rough compound channels by one-dimensional approaches. Such approaches, which are widely used in practice, utilize one of a number of ... -
Discussion of “Field-Scale Assessment of Uncertainties in Drip Irrigation Lateral Parameters” by Yeboah Gyasi-Agyei
(American Society of Civil Engineers, 2009) -
Closure to “Field-Scale Assessment of Uncertainties in Drip Irrigation Lateral Parameters” by Yeboah Gyasi-Agyei
(American Society of Civil Engineers, 2009) -
Integrated Reservoir-Based Canal Irrigation Model. I: Description
(American Society of Civil Engineers, 2009)The success of irrigation system operation and planning depends on the quantification of supply and demand and equitable distribution of supply to meet the demand if possible, or to minimize the gap between the supply and ... -
Irrigation System Modernization: Case Study of the Middle Rio Grande Valley
(American Society of Civil Engineers, 2009)The Middle Rio Grande Conservancy District (MRGCD) was officially founded in the 1920s, but it may well be the oldest operating irrigation system in North America. Currently the MRGCD serves about 22,300 ha of irrigated ... -
NRCS Design Storm Erosivity
(American Society of Civil Engineers, 2009)Two methods are developed to estimate rainfall erosivity indices produced by four standard design storms developed by the National Resource Conservation Service (NRCS), which are used widely throughout the United States. ... -
New Paradigm for Sizing Riparian Buffers to Reduce Risks of Polluted Storm Water: Practical Synthesis
(American Society of Civil Engineers, 2009)Riparian buffers are commonly promoted to protect stream water quality. A common conceptual assumption is that buffers “intercept” and treat upland runoff. As a shift in paradigm, it is proposed instead that riparian buffers ... -
Pivoting Strategies in the Solution of the Saint-Venant Equations
(American Society of Civil Engineers, 2009)Pivoting was incorporated in the process of solving the linear system of equations that results after discretizing the Saint- Venant equations using the four-point implicit scheme, and applying the Newton–Raphson algorithm ... -
Reducing Water Seepage with Anionic Polyacrylamide: Application Methods and Turbidity Effects
(American Society of Civil Engineers, 2009)Researchers used column and flume experiments with uniform silica sand with and without suspended solids to examine the extent and longevity of hydraulic conductivity reduction (HCR) resulting from three anionic polyacrylamide ... -
Integrated Reservoir-Based Canal Irrigation Model. II: Application
(American Society of Civil Engineers, 2009)In a companion paper, development of an integrated reservoir-based canal irrigation model (IRCIM) was described. This developed model combines catchment hydrological modeling, reservoir water balance, command hydrological ...