نتایج جستجو برای: drought indices

تعداد نتایج: 112757  

Journal: :Remote Sensing 2016
Nilda Sanchez-Martin Angel Gonzalez-Zamora María Piles José Martínez-Fernández

A new index for agricultural drought monitoring is presented based on the integration of different soil/vegetation remote sensing observations. The synergistic fusion of the surface soil moisture (SSM) from the Soil Moisture and Ocean Salinity (SMOS) mission, with the Moderate Resolution Imaging Spectroradiometer (MODIS) derived land surface temperature (LST), and water/vegetation indices for a...

Drought stress is one of the most important environmental stresses that have limited the production of wheat, especially in arid and semi-arid regions of the world. To recognize drought tolerant rain-fed wheat genotypes and to determine the best tolerance/susceptibility indices, a study was conducted at the Agricultural Research Station of Miandoab for two cropping years (2013-15). The experime...

Journal: :تولید گیاهان زراعی 0
زهرا تقی پور دانش آموخته کارشناسی ارشد، گروه اصلاح نباتات، دانشگاه محقق اردبیلی رسول اصغری ذکریا دانشیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی ناصر زارع استادیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی پریسا شیخ زاده مصدق استادیار گروه اصلاح نباتات، دانشگاه محقق اردبیلی

in order to evaluate drought tolerance of some aegilops triuncialis ecotypes a factorial experiment based on a completely randomized design was conducted under non-stress and drought stress (irrigation until 50% of heading) condition in the greenhouse of mohaghegh ardabili university in 2012. drought tolerance and susceptibility indices for grain yield were calculated and principal component an...

Journal: Desert 2016
A. Afzali A. Golpaygani E. Azizabadi Farahani E. Khosrojerdi H. Keshtkar M. TaghiNaghilou N. Moazami S. Pakzad Z. Yousefi

     Drought monitoring is a fundamental component of drought risk management. It is normally performed using various drought indices that are effectively continuous functions of rainfall and other hydrometeorological variables. In many instances, drought indices are used for monitoring purposes. Geostatistical methods allow the interpolation of spatially referenced data and the prediction of v...

Agriculture in Lorestan Province is based on irrigated and rainfed agriculture, which uses two sources of surface water and groundwater. One of the most important natural hazards affecting the Lorestan Province agriculture is the occurrence of drought and its consequences. The main purpose of this study is to investigate the effects of drought on irrigated agriculture in this province. The data...

Drought is a complex phenomenon caused by the breaking of water balance and it has always an impact on agricultural, ecological and socio-economic spheres. Although the drought indices deriving from remote sensing data have been used to monitor meteorological or agricultural drought, there are no indices that can suitably reflect the comprehensive information of drought from meteorological to a...

     In order to study genetic variation and effect of drought stress on grain yield, some agronomical traits and 13 drought tolerance indices, an experiment was conducted on nine cultivars at Shahid Bahonar University of Kerman research field. The experimental layout was conducted in a randomized complete block design with three replications under two complementary irrigation and dryland condi...

Journal: :مطالعات جغرافیای مناطق خشک 0
حسین نگارش محسن آرمش

drought forecasting in khash city by using neural network model hossein negaresh associate professor of geography and environmental planningfaculty, university of sistan & baluchestan mohsen armesh holding master degree in climatology in environmental planning extended abstract 1- introduction drought is condition of lack of rainfall and increase in temperature occurring in any climatic condit...

Journal: :ecopersia 0
masome sarhadi former master student, department of rangeland and watershed management, university of zabol, zabol, iran mohammad nohtani assistant professor, department of rangeland and watershed management, faculty of water and soil, university of zabol, zabol, iran mohammad reiki former master student, department of rangeland and watershed management, university of zabol, capacity building for the international project of menarid in sistan and baluchistan province, iran

the effect of drought indices on hydrostatic variations and qualitative parameters of the zahedan plain's aquifer was investigated. for this purpose, 12-year statistics from observational and piezometry wells in the plain, the drought index of percentage normal )pn), standardized precipitation index )spi(, and 30-year precipitation statistics of zahedan station were used. results revealed ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید