نتایج جستجو برای: samani
تعداد نتایج: 190 فیلتر نتایج به سال:
Solar radiation, which is used in hydrological modeling, agricultural, solar energy systems, and climatological studies, the most important element of reaching earth. The present study compared, performance two empirical equations -Angstrom Hargreaves-Samani equations- and, three machine learning models -Artificial Neural Networks (ANN), Support Vector Machine (SVM), Long Short-Term Memory (LST...
The aim of this study was to analyze the water demand in banana, papaya and coconut crops grown irrigation districts Araras Norte Baixo Acaraú, located State Ceará. A historical meteorological series regions where from are used. Precipitation, maximum minimum temperatures, relative humidity data were obtained these series. From acquired precipitation data, frequency intensity dry rainy years ar...
Evaluating potential evapotranspiration plays an important role in planning, designing, and managing water resources, especially in arid and semi arid zones. The aim of the present research is considering spatio-temporal changes of different potential evapotranspiration methods such as Thornthwaite, Hargreaves, and Blaney-Criddle in the Maharlou Watershed, Fars province. So, yearly statistics o...
This study was designed to investigate the possibility of using the surface energy balance algorithm for land (SEBAL) and mapping evapotranspiration at high resolution with internalized calibration (METRIC) models to estimate evapotranspiration (ET) in Shahrekord plain (Chaharmahal va Bakhtiari province, Iran). Two sets of Landsat ETM+ data dated June 30th and August 21st, 1999 were provi...
the aim of the present study was to investigate the relationships between self-esteem, marital relationship and components of happiness (consists of positive affect, negative affect and life-satisfaction), in married women. the 97 women were tested using the rosenberg self-esteem questionnaire (barrow, 2007), marital relationship questionnaire (khayyer and samani, 2003), positive and negative a...
The evapotranspiration rate has a vital role in agricultural water management. In this paper, ability of Box-Jenkins models in forecasting the reference potential evapotranspiration is estimated. For this purpose meteorological data of Mehrabad synoptic station in Tehran was selected. Using this data and according to eight famous evapotranspiration equations amounts of evapotranspiration were f...
Background & Objective: Health is undoubtedly on of the most important aspects of human life issues and various personal and family factors can have a key role in this issue. The aim of the present study was to predict physical and mental health among married teachers of elementary schools in Karaj city based on components of decision making and problem solving, family solidarity, express...
The combined impacts of woody plant encroachment and climate variability have the potential to alter water balance in many sagebrush steppe ecosystems Western USA, leading reduced availability these already water-scarce regions. This study compared water-balance characteristics two adjacent semiarid watersheds central Oregon, USA: one dominated by big western juniper. Precipitation, springflow,...
Estimar a radiação solar é importante para vários segmentos da sociedade como agricultura, meteorologia e geração de energia elétrica (sistemas fotovoltaicos). Este artigo tem objetivo estimar Radiação Solar Global em quatro cidades do estado Pará - Brasil, por meio modelos estimativas, Hargreaves-Samani Bristow-Campbell, usando dados meteorológicos fornecidos pelas Estações Meteorológicas Auto...
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