Modifying Hargreaves-Samani Equation for Estimating Reference Evapotranspiration in Dryland Regions of Amudarya River Basin
نویسندگان
چکیده
منابع مشابه
History and Evaluation of Hargreaves Evapotranspiration Equation
A brief history of development of the 1985 Hargreaves equation and its comparison to evapotranspiration ~ET! predicted by the Food and Agricultural Organization of the United Nations ~FAO! Penman-Monteith method are described to provide background and information helpful in selecting an appropriate reference ET equation under various data situations. Early efforts in irrigation water requiremen...
متن کاملAssessing Experimental and Intelligent Models in Estimating Reference Evapotranspiration
Introduction: As the most important element in the hydrologic cycle which depends on climate variables such as near-ground wind speed, air temperature, solar radiation, and relative humidity, reference evapotranspiration (ET0) is normally computed through a variety of methods, each of which requires different and in some cases extensive data that are unavailable in many circumstances, especial...
متن کاملpredicting daily reference evapotranspiration in a humid region of china by the locally calibrated hargreaves-samani equation using weather forecast data
the hargreaves-samani (hs) equation, which estimates reference evapotranspiration (et0) using only temperature as input, should be most suitable for et0 prediction based on weather forecasting data. in the current study, the hs equation is calibrated with daily et0 by the penman-monteith equation, and is evaluated to check the possibility of predicting daily et0 based on weather forecast data. ...
متن کاملAnalysis of Reference Evapotranspiration Variability and Trends in the Seonath River Basin Chhattisgarh
In this study, ETo was calculated using FAO-56 Penman Monteith method. Lag-1 autocorrelation coefficient was performed to detect the presence of serially correlation in data series. Mann-Kendall (MK) or Modified Mann Kendall (MMK) and Spearman’s rho test were applied to detect the trend in annual and monthly ETo at 8 districts over 49 years (1960–2008) in the Soenath river basin, Chhattisgarh (...
متن کاملJP 4.13 ENSO EFFECTS ON REFERENCE EVAPOTRANSPIRATION (ETo) AT THE MAIPO RIVER BASIN, CHILE
The efficient operation of water resources is one of the major challenges in modern society. One of the main characteristics of the hydrological cycle corresponds to its temporal variability, expressed as fluctuations in the precipitation regime as well as modifications in the rates of evapotranspiration as a result of changes in atmospheric conditions. A better knowledge of the relationships b...
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ژورنال
عنوان ژورنال: Agricultural Sciences
سال: 2018
ISSN: 2156-8553,2156-8561
DOI: 10.4236/as.2018.910094