Results 261 to 270 of about 7,210 (295)

Reference and Crop Evapotranspiration

2012
Advancements have been made in estimating potential and reference evapotranspiration. Actual crop evapotranspiration estimation still is a challenge due to limited availability of local crop coefficients and large-scale variation in field conditions.
Wossenu Abtew, Assefa Melesse
openaire   +1 more source

Sensitivity analysis of the reference crop evapotranspiration in a humid region

Environmental Science and Pollution Research, 2019
This study examined the sensitivity of reference crop evapotranspiration (ET0) to climatic variables in a humid region in Iran. ET0 was estimated using the FAO-56 Penman-Monteith (PMF-56), Blaney-Criddle (BC), and Hargreaves-Samani (HG) methods. Sensitivity analysis was performed by two distinct methods which were (i) changing the value of a certain ...
Seyed Mostafa Biazar, Yagob Dinpashoh, Vijay P. Singh   +2 more
openaire   +2 more sources

Prediction of daily crop reference evapotranspiration (ET0) values through a least-squares support vector machine model

Hydrology Research, 2011
Real-time prediction of daily reference crop evapotranspiration (ET0) is the basis for estimating crop evapotranspiration and for computing crop irrigation requirements.
Xianghong Guo, Xihuan Sun, Sun Xihuan
exaly   +2 more sources

Estimating reference crop evapotranspiration using HGA-LSSVM

2010 Sixth International Conference on Natural Computation, 2010
Reference crop evapotranspiration (ETo) is the basis for estimating crop evapotranspiration and for computing crop irrigation requirements. In recent years, Least squares support vector machines (LSSVM) have been applied to forecasting in many areas of engineering. In this paper, a novel hyper-parameter selection for LSSVM regression is presented based
Xianghong Guo, Xihuan Sun, Juanjuan Ma
openaire   +1 more source

Trends in reference crop evapotranspiration over Iran

Journal of Hydrology, 2011
Summary This study examined the trends in reference crop evapotranspiration (ET0) on monthly and annual time scales in Iran. ET0 was estimated using the globally accepted Food and Agriculture Organization (FAO) Penman Monteith method (FAO-56 PM) over the 16 weather stations located in the different regions of Iran.
Yagob Dinpashoh, Deepak Jhajharia, Ahmad Fakheri-Fard, Vijay P. Singh, Ercan Kahya   +4 more
openaire   +1 more source

Predicting reference evapotranspiration for screenhouse-grown crops

Agricultural Water Management, 2014
Abstract The purpose of the study is to estimate the reference evapotranspiration of screenhouse-grown crops (ET o,in ) from routine outside weather data and main screenhouse characteristics. To this aim, all the microclimatic variables required to calculate ET o,in by means of the standard FAO-56 Penman–Monteith formula were measured under three ...
Evangelini Kitta, Alain Baille, Nikolaos Katsoulas, Nikolaos Rigakis   +3 more
openaire   +1 more source

Accuracy of Estimated Reference Crop Evapotranspiration

Journal of Irrigation and Drainage Engineering, 1989
Evapotranspiration from cool‐season grasses is used as the reference for ET0. The requirements for local calibration for three equations for ET0 recommended by the Food and Agriculture Organization of the United Nations (FAO) are shown for different climatic regions of California.
openaire   +1 more source

Sensitivity of Reference Crop Evapotranspiration in Shaanxi Province

Applied Mechanics and Materials, 2014
Reference crop evapotranspiration (ET0) is a key to estimate crop water requirements, and also an important component of irrigation schedule and water resources planning, sensitivity analysis are crucial in assessing the impact of climate changes inET0estimations.
Yue Song, Xiao Ling Su
openaire   +1 more source

Forecasting weekly reference crop evapotranspiration series

Hydrological Sciences Journal, 1995
Abstract Evapotranspiration (ET) is an important process in the hydrological cycle and needs to be accurately quantified for proper irrigation scheduling and optimal water resources systems operation. The time variant characteristics of ET necessitate the need for forecasting ET. In this paper, two techniques, namely a seasonal ARIMA model and Winter's
S. MOHAN, N. ARUMUGAM
openaire   +1 more source

Trends in reference crop evapotranspiration in Urmia Lake basin

Arabian Journal of Geosciences, 2020
Evapotranspiration is one of the main important components of hydrologic cycle. Trend analysis of reference crop evapotranspiration (ET0) provides useful information for understanding the crop water requirements associated with climate change. In this study, monotonic trends were analyzed in monthly, seasonal, and annual timescales at the nine stations
Yagob Dinpashoh, Omid Babamiri
openaire   +1 more source