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...

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...

Para um bom manejo de irrigação dos cultivos agrícolas a determinação da evapotranspiração é indispensável. Pensando nisso objetivou-se com este estudo comparar e avaliar o desempenho estimativa referência (Eto) pelos métodos Hargreaves-Samani, Makkink, Budyko, Turc, Jensen-Haise, Linacre, Kharrufa, Radiação FAO24 em relação ao método padrão Penman-Monteith/FAO no período seco chuvoso, Imperatr...

*Corresponding author: Javad Baharara, Professor, Dept. of Biology & Research Center for Animal Development Applied Biology, Mashhad Branch, Islamic Azad University, Mashhad, Iran, Tel: + 98 5l1 8437092, Fax: + 98 511 8437092, Email: [email protected] Introduction Nowadays, the widespread use of various electrical and telecommunication appliances that produce electromagnetic fields is increasi...

No part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without prior written permission from the Publisher. i Acknowledgements I would like to acknowledge the generous economical support of the present project granted by: would like to thank: My principal superv...

The alluvial plain of Sarvestan bears the sole source of potable water in Sarvestan county, Fars Province, Iran. In recent years, due to extended heavy pumping, the groundwater storage has been reduced continuously. The UNGWM (United Nation Ground Water Model) is used to evaluate the hydraulic characteristics of the Sarvestan aquifer and its future response to various regimes of recharge and di...