Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 361-380 of 3826
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Pumped Well Drainage System Effects on Mitigating Barrage-Induced Inundation Problems in Low-Lying Plains
(ASCE, 1/1/2020 1)The construction of a new barrage, the Gangjeong–Koryeong Barrage, in the Nakdong River and related sluice-gate operation has resulted in higher river-water and groundwater levels in the floodplain, which has caused the ... -
Effects of Perforation Geometry on Pipe Drainage in Agricultural Lands
(ASCE, 2020)Corrugated high density polyethylene pipes, where groundwater enters through perforations on the pipe wall, are widely used in subsurface drainage systems on agricultural lands. There has been a growing interest in using ... -
Flow Characteristics and Hydraulic Performance of a Gun-Type Impact Sprinkler with and without Aeration
(ASCE, 2020)A water jet aeration method was used to address the problem of high water application rates for rotating impact sprinklers operating at low pressures at the distal end of the wetted radius that cause uneven water distribution. ... -
Numerical Assessment of the Performance of Bed Water Jets in Submerged Hydraulic Jumps
(ASCE, 2020)Submerged hydraulic jumps commonly occur downstream of irrigation structures. Submerged hydraulic jumps dissipate energy to some extent, and bed water jets can be employed as a means to increase their energy dissipation. ... -
Efficient Solution Algorithm for Unsteady Flow in Channel Networks Using Subtiming Technique
(ASCE, 2020)This paper describes a computationally efficient numerical model for unsteady flow computations in open channel networks using the four-point Preissmann implicit scheme. The proposed algorithm achieves improved convergence ... -
Half-Round Circular Crested Weir: On Hysteresis, Instabilities, and Head–Discharge Relationship
(ASCE, 2020)Waters flowing over rounded weirs experience a rapidly accelerated flow region near the crest. The head-discharge relationship of a half-round crested weir was tested physically under carefully controlled flow conditions ... -
Comparative Study of Time Series Models, Support Vector Machines, and GMDH in Forecasting Long-Term Evapotranspiration Rates in Northern Iran
(ASCE, 2020)Evapotranspiration estimation and forecasting is a key step in water management projects, especially in water-scarce countries such as Iran. Seasonal autoregressive integrated moving average (SARIMA), support vector machine ... -
Unsteady Stage-Discharge Relationships for Sharp-Crested Weirs
(ASCE, 2020)Currently, discharges passing measurement devices and structures in unsteady flow conditions are determined based on relationships developed for steady flow condition due to lack of sufficient data. In this study, the ... -
Optimization Method for a Lap-Assembled Parabolic Concrete Channel Structure
(ASCE, 2020)Based on the structural force analysis of a lap-assembled parabolic concrete channel, it is thought that the longitudinal tensile stress is the main factor that influences channel damage. The locations where the channel ... -
Minor Losses through Start Connectors in Microirrigation Laterals: Dimensional Analysis and Artificial Neural Networks Approaches
(ASCE, 2020)In microirrigation systems, start connectors are used at lateral-manifold or microtube-lateral junctions, and minor losses occur when water flows through the start connectors. The connector’s geometry may cause contractions ... -
Irrigation Scheduling Approaches and Applications: A Review
(ASCE, 2020)In an effort to improve plant growth and to achieve high yield and/or quality, irrigation scheduling (IS) seeks to provide plants with appropriate quantities of water at appropriate times. To better understand irrigation ... -
Time-Series Prediction of Streamflows of Malaysian Rivers Using Data-Driven Techniques
(ASCE, 2020)A reliable and continuous streamflow simulation capability is essential for systematic management of water resource systems. Thus, predicting streamflow is important for water management and flood control. This study ... -
Optimization of Operation Strategies for an Interbasin Water Diversion System Using an Aggregation Model and Improved NSGA-II Algorithm
(ASCE, 2020)To maximize the benefits of an interbasin water diversion system (IBWD), an aggregation model and improved NSGA-II algorithm were constructed to establish operation strategies for water diversion and water supply. An ... -
Effect of Sodicity on Soil–Water Retention and Hydraulic Properties
(ASCE, 2020)The present study analyses the effect of sodicity on unsaturated soil hydraulic properties. Permeameter and pressure plate experiments were conducted on six texturally different soils at varying sodicity levels to obtain ... -
Novel Backwashing Maintenance Method for Permeable Concrete Pavement: Two-Year Field Study
(ASCE, 2020)In this study, a novel backwashing maintenance method for permeable concrete pavements (PCP) was developed, and its performance was evaluated via a 2-year field comparative study at two PCP sites. Results showed that regular ... -
Experimental Modeling of Submerged Pivot Weir
(ASCE, 2020)An inclined rectangular overflow structure, also called a pivot weir, consists of a rectangular plate, angled downstream from the vertical, that can be used as an upstream water level control device. A pivot weir is submerged ... -
Design and Test of Tractor-Attached Laser-Controlled Rotary Scraper Land Leveler for Paddy Fields
(ASCE, 2020)To realize high-efficiency and precision paddy field leveling, a tractor-attached laser-controlled rotary scraper land leveler for paddy fields was designed. An elevation model for the laser leveler’s scraper was established, ... -
Gene-Expression Programming Approach for Development of a Mathematical Model of Energy Dissipation on Block Ramps
(ASCE, 2020)A block ramp is an environmentally friendly stream restoration structure consisting of a base material of stone with minimal negative environmental impact. This not only decreases riverbed shear stress but also increases ... -
Geospatial DSS for Maintaining Agricultural Diversions under Environmental Flow Requirements
(ASCE, 2020)Competing demands for scarce water supplies in irrigated alluvial valleys can lead to conflicts between disparate uses, resulting in an increased risk of restrictions on agricultural diversions. A tool for understanding ... -
Grid-Based Model for Estimating Evapotranspiration Rates of Heterogeneous Land Surface
(ASCE, 2020)The complementary relationship areal evapotranspiration (CRAE) model estimates actual evapotranspiration (ET) based on potential and wet environment evapotranspiration rates. The existing CRAE-based models that calculate ...