نتایج جستجو برای: standardized evapotransprecipitation index sepi

تعداد نتایج: 461681  

Journal: :Terrestrial, Atmospheric and Oceanic Sciences 2016

Journal: Desert 2009
A. Malekian M. Karimpour Reyhan N. Kamali N. Mashhadi Y. Esmaeilpour

This study was conducted to identify drought event and its emerging regions in Markazi desert, Iran with focus onSemnan province in a 30 years statistical period. In this research, 61 stations having adequate data selected and usedafter extracting annual statistic from monthly and daily data. Standardized precipitation index values for each stationwere calculated and classified. The Results hav...

M. Elhaeesahar M. Masoudi

The Standardized Precipitation Index (SPI) is a widely used drought index to provide good estimations of the intensity, magnitude and spatial extent of droughts. The objective of this study was to analyze the spatial pattern of drought by SPI index. In this paper, patterns of drought hazard in Khuzestan are evaluated according to the data of 17 weather stations during data recording. The influe...

2016
Giulia Melis Elena Gelormino Giulia Marra Elisa Ferracin Giuseppe Costa

Giulia Melis 1,*, Elena Gelormino 2, Giulia Marra 1, Elisa Ferracin 3 and Giuseppe Costa 3 1 Environmental Heritage and Urban Redevelopment Unit, SiTI—Higher Institute on Territorial Systems for Innovation, via Boggio 61, 10138 Torino, Italy; [email protected] 2 ASL Torino 5, Local Public Health Agency, Piazza S. Pellico 1, 10023 Chieri, Italy; [email protected] 3 SEPI Gru...

2014
Jaber Almedeij

Implementation of adequate measures to assess and monitor droughts is recognized as a major matter challenging researchers involved in water resources management. The objective of this study is to assess the hydrologic drought characteristics from the historical rainfall records of Kuwait with arid environment by employing the criterion of Standardized Precipitation Index (SPI). A wide range of...

2008
Shraddhanand Shukla Andrew W. Wood

[1] Many current metrics of drought are derived solely from analyses of climate variables such as precipitation and temperature. Drought is clearly a consequence of climate anomalies, as well as of human water use practices, but many impacts to society are more directly related to hydrologic conditions resulting from these two factors. Modern hydrology models can provide a valuable counterpart ...

ژورنال: علوم آب و خاک 2007
محمد موسایی سنجره‌ای, , مهدی بصیری, ,

Selection of efficient indices is very important for detecting and measuring random, uniform and clumped distribution patterns of plants in different plant communities. To compare and evaluate indices of dispersion patterns of plants, three stands were selected in Nodushan, Yazd. A (50m*100m) area was selected within each stand for sampling. Sampling was randomly systematicly conducted. Measure...

Journal: :مرتع و آبخیزداری 0
مریم آذرخشی استادیار مجتمع آموزش عالی تربت حیدریه بهنوش فرخ زاده دانشجوی دکتری آبخیزداری دانشگاه تهران محمد مهدوی استاد دانشگاه تهران، دانشکده منابع طبیعی، ایران حسین ارزانی استاد دانشگاه تهران، دانشکده منابع طبیعی، ایران حسن احمدی استاد دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران

iran is located in dry belt of the earth and always involved with drought in different sections. drought has already caused many losses to natural plant cover, agriculture and human society. for drought monitoring, we can use some drought indecies. in this research, the standard index of annual precipitation)siap),sandardized precipitation index (spi) and palmer drought severity index (pdsi) we...

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