CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
نویسندگان
چکیده
منابع مشابه
Evaluation of Sensible Heat Flux and Evapotranspiration Estimates Using a Surface Layer Scintillometer and a Large Weighing Lysimeter
Accurate estimates of actual crop evapotranspiration (ET) are important for optimal irrigation water management, especially in arid and semi-arid regions. Common ET sensing methods include Bowen Ratio, Eddy Covariance (EC), and scintillometers. Large weighing lysimeters are considered the ultimate standard for measurement of ET, however, they are expensive to install and maintain. Although EC a...
متن کاملAn expression for land surface water storage monitoring using a two-formation geological weighing lysimeter
Field studies have demonstrated that ground surface rainfall accumulation can be detected at depth by synchronous increases in static confined groundwater pore pressures. This opens the way for “geological weighing lysimeters” providing disturbance-free water storage monitoring of the surface environment, in effect by weighing a significant land area in real time. Such systems require specific ...
متن کاملDynamic Weighing Calibration Method for Liquid Flowmeters -a New Approach
In the last years, the PTB liquid flow group has been working on the development of a new method to calibrate liquid flowmeters under dynamics conditions [1,2]. Such a measurement principle is based on a dynamic weighing approach, which is able to reproduce the unit of mass flow several times, with the ultimate goal to reduce the calibration time, energy cost, and workload in liquid flow calibr...
متن کاملevaluation of reference evapotranspiration models for a semiarid environment using lysimeter measurements
an accurate determination of evapotranspiration is required for many studies that involve estimation of the water balance. one methodology is the use of lysimeters. considering the semiarid climate of kerman province, in southeastern parts of iran, the only operating electronic weighing lysimeter in the country was used for calculating daily eto from april 2004 to march 2005 in three different ...
متن کاملEstimated evapotranspiration of rice based on pan evaporation as a surrogate to lysimeter measurement
Reference crop evapotranspiration (ET o), used to determine actual crop evapotranspiration, is often estimated from pan evaporation (EP) data. However, uncertainties in the relationship between ET o and EP often result in unreliable estimate of crop evapotranspiration. This study investigated the relationship between measured and estimated crop evapotranspirations, ET m and ET e, respectively, ...
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ژورنال
عنوان ژورنال: Revista Caatinga
سال: 2020
ISSN: 1983-2125,0100-316X
DOI: 10.1590/1983-21252020v33n324rc