Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2661-2680 of 3826
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Water Planning for Food Production in Developing Countries
(American Society of Civil Engineers, 2000) -
Circular Isobaric Cavity in Descending Unsaturated Flow
(American Society of Civil Engineers, 2000)Two-dimensional flows near cavities were studied by superposition of the Philip solution for an isobaric cylindrical cavity in an infinite unsaturated soil and vertical infiltration. Depending on the radius of the cavity ... -
Field-Scale Observations of Arsenic and Boron in Soil Irrigated with Drainwater
(American Society of Civil Engineers, 2000)Addition of a strong acid to irrigation water could enhance sorption of boron and arsenic in a Lahontan Valley field. Approximately 90 soil samples, taken from a field irrigated with mildly brackish drainage water (TDS ≈ ... -
A Priori Identifiability of Unsaturated Soil Parameters
(American Society of Civil Engineers, 2000)A priori identifiability (i.e., identifiability under perfect data) is a necessary condition for posteriori identifiability (i.e., identifiability under real data), and by implication a priori nonidentifiability is a ... -
Problems of Irrigation in Developing Countries
(American Society of Civil Engineers, 2000) -
Plant Water Use and Crop Curves for Hybrid Poplars
(American Society of Civil Engineers, 2000)Four years of weekly soil water data measured by neutron probe were analyzed to determine average daily, monthly, and seasonal drip-irrigated hybrid poplar water use. The plantation studied is located near Boardman, Oregon, ... -
Stilling Basins for Pipe Outlets Using Wedge-Shaped Splitter Block
(American Society of Civil Engineers, 2000)A series of experimental runs on the performance of stilling basin models with different configurations in terms of shape, size, and location of appurtenances was carried out to develop an efficient and economical stilling ... -
Evapotranspiration and Crop Coefficients of Wheat and Sorghum
(American Society of Civil Engineers, 2000)Wheat and sorghum are important cereal crops next only to rice in India and several other Asian countries. Improved water management requires accurate scheduling of irrigation, which in turn requires an accurate measurement ... -
Soil Salinity Modeling over Shallow Water Tables. I: Validation of LEACHC
(American Society of Civil Engineers, 2000)Soil salinity is a very common problem in today's irrigated agriculture. High salinity levels adversely impact crop yields and reduce overall soil quality. The presence of a saline shallow water table can be a major ... -
Simultaneous Flow over and under a Gate
(American Society of Civil Engineers, 2000)This paper reports the results of an investigation carried out to establish the stage-discharge relationship for a flow simultaneously discharging over and under a sluice or a broad-crested gate. The stage-discharge ... -
Discussion of “Factor <i>G</i> for Pipelines with Equally Spaced Multiple Outlets and Outflow” by Arif A. Anwar
(American Society of Civil Engineers, 2000) -
Border Irrigation Field Experiment. I: Water Balance
(American Society of Civil Engineers, 2000)This paper presents the results from a detailed field experiment of water movement on a border-irrigated bay in northern Victoria, Australia, an area characterized by shallow ground-water tables and salinization problems. ... -
Operational Sensitivity of Irrigation Structures
(American Society of Civil Engineers, 2000)The adjustment of structures along irrigation free-surface systems aims to achieve, or maintain, a targeted status of the canal network. The interaction between structures and reaches is an important aspect of canal control ... -
Closure to “Factor <i>G</i> for Pipelines with Equally Spaced Multiple Outlets and Outflow” by Arif A. Anwar
(American Society of Civil Engineers, 2000) -
Approximating Wetted Perimeter in Power-Law Cross Section
(American Society of Civil Engineers, 2000)The wetted perimeter is an open-channel parameter that influences surface drag and also influences infiltration in furrows and unlined canals. Various approximations to the wetted perimeter are examined for channel cross ... -
Closure to “Theoretical End‐Depth‐Discharge Relationship for Free Overfall” by Vito Ferro
(American Society of Civil Engineers, 2000) -
Optimal Irrigation Allocation: A Multilevel Approach
(American Society of Civil Engineers, 2000)Optimal resources allocation strategies for a canal command in the semiarid region of Indian Punjab are developed in a stochastic regime, considering the competition of the crops in a season, both for irrigation water and ... -
Simulating Elevation and Infiltration in Level-Basin Irrigation
(American Society of Civil Engineers, 2000)Several authors have reported that the spatial variability of infiltration and soil surface elevation can have a pronounced effect on surface irrigation performance. This study was conducted to assess the improvement of ... -
Border Irrigation Field Experiment. II: Salt Transport
(American Society of Civil Engineers, 2000)This paper presents results from an experiment to measure the salt transport processes within a border-irrigated bay in northern Victoria, Australia, an area with shallow saline ground water and cracking soils. The overland ... -
Street Storm Water Conveyance Capacity
(American Society of Civil Engineers, 2000)The street hydraulic capacity to convey storm water is dictated by the street gutter geometry and hydraulic characteristics. With the consideration of traffic safety, the street hydraulic conveyance capacity (SHCC) is also ...