Lysimetry for Evaporation and Transpiration Measurement
Large hydraulically weighed lysimeters were used to measure evapotranspiration (ET), evaporation (E), and transpiration (T). Weighing lysimeters for T measurements were covered to suppress...
Water Quality Sampling Under Preferential Flow Conditions
Shallow wells, porous cup samplers, and wick and gravity pan lysimeters were used to observe the movement of bromide applied to the surface of a grass covered field during a 23 day period....
Percolation Lysimeters for Water Quality Sampling
A field method to measure, year-around, the quantity and quality of leachate under irrigated crops has been developed. A specific objective was to evaluate percolation lysimeters as tools...
Lysimeters to Study Soil Water Movement and Crop Water Use Under High Water Table Conditions
A system of 6 drainage lysimeters was constructed to conduct studies of water use and water movement in 3 different soils influenced by high water tables. The lysimeters were equipped...
Drainage Lysimeters for High Water Table Citrus Studies
Forty drainage lysimeters were installed in 1988 to conduct water quality and consumptive use studies for citrus. The lysimeters were designed to simulate the high water table conditions...
Use of Lysimeters for Determining Characteristics of Pore Water
Lysimeters have been installed and used during the cleanup and stabilization of several former uranium processing sites in the western United States. In particular lysimeters have been...
High Saline Water-Table Effect on Wheat Irrigation
Hydraulic, weighing lysimeters were used for five years to measure the effect of high, saline water tables on irrigation requirement of wheat. Each year the wheat was grown with no water...
Comparation of Different Forms of Penman Equation
The research was carried out near Foggia (in Southern Italy) at 90 m above sea level and at 41? 27' N latitude, using two drainage lysimeters, filled with a silt clay soil...
Lysimeters: Data Acquisition and Analysis
Lysimeters provide the most direct method for measuring evapotranspiration (ET). For ten years we have used weighing lysimeters capable of a resolution equivalent to 0.02 mm of water....
Use of Lysimeters to Measure Fog Interception in Tussock Grassland New Zealand
Previous studies of the water balance of single Tussock plants in small non-weighing lysimeters over a range of elevations in east-central Otago province suggest that tussock grassland...
Representativeness of Floating Evapotranspirometers
In the first part of the paper, the design, the working principle and the field installation of floating evapotranspirometer are described with the data logging system which delivers continuous...
Installation and Operation of Large Drainage Lysimeters on Grapes
Six large (3.05 m ? 3.66 m ? 1.83 m) drainage lysimeters were installed in 1984 in the middle of a 1.2 ha trickle irrigated experimental vineyard. Each was planted to two V. vinifera grapevines....
Use of Lysimeters to Monitor a Sanitary Landfill
A vadose zone monitoring program has been developed using basin lysimeters to evaluate the environmental impacts of a sanitary waste landfill. Lysimeter systems, consisting of collection...
Accuracies of Lysimeter Data Acquisition Systems
Electronic dataloggers are integral parts of most weighing lysimeter systems. Dataloggers supply excitation voltages to lysimeter load cells and measure resulting voltage signals. Resolution...
Relationship Between Lysimeter Area and Evapotranspiration (ET)
The lysimeter is an important instrument for measuring evapotranspiration (ET) of crops. It is widely used in the irrigation and drainage experimental stations in China. However, the areas...
Lysimetric Monitoring for Operation of Irrigation Systems in the USSR
The author suggests a new method for operational control of irrigation regimes which is based on monitoring of a number of critical parameters related to the yield potentials of crops....
Prefabricated Weighing Lysimeter for Remote Research Stations
After designing and constructing several precision scale system weighing lysimeters in Southern Europe and the Middle East, the need arose for a prefabricated 'turn-key'...
Flow Measurement in Irrigation Practice: State-of-the-Art
State-of-the-art flow metering developments for irrigation are reviewed. Selected older methods are updated with recent improvements. These include orifice meters, venturi meters, critical-flow...
Thermal Regimes at Tailwaters of Hydroelectric Dam
Continuous temperature data were collected in the field for periods of approximately two weeks in Center Hill Tailwater. These data were analyzed to determine the warming rates and travel...
Optimization of Furrow Infiltration Parameters from Advance Times and Advance Rates
Optimal design and management of surface irrigation systems requires detailed knowledge of field-wide infiltration. Evaluating infiltration parameters is difficult due to temporal and...
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