نتایج جستجو برای: transeau drought index

تعداد نتایج: 424035  

Journal: :Water Resources Research 2016

حمزه, سعید , غلام نیا, مهدی , فراهانی, زهرا , مهدوی, شهریار , چترآبگون, امید ,

As a result of climate change and reduction in rainfall during the last decade, drought has become big problem in the world, especially in arid and semi-arid areas such as Iran. Therefore drought monitoring and management is great of important. In contrast with the traditional methods which are based on the ground stations measurements and meteorological drought monitoring, using the remote sen...

2004
Robert D. Field Yonghe Wang

Indonesia’s fire and haze problem is reviewed, and a model quantifying the relationship between drought and haze from biomass burning in western Indonesia is presented. Visibility observations from weather stations in Sumatra and Kalimantan were used as a haze indicator. The Drought Code component of the Canadian Forest Fire Weather Index System was used as a drought indicator. Using meteorolog...

2014
Hao Yan Shao-Qiang Wang Hou-Quan Lu Qin Yu Zai-Chun Zhu Ranga B. Myneni Qiang Liu Herman H. Shugart

Vegetation effects are currently disregarded in Palmer Drought Severity Index (PDSI), and the sensitivity of PDSI to the choice of potential evaporation (EP) parameterization is often a concern. We developed a revised self-calibrating PDSI model that replaces EP with leaf area index-based total evapotranspiration (ARTS E0). It also included a simple snowmelt module. Using a unique satellite lea...

2014
Jianhua Wang Dong Jiang Yaohuan Huang Hao Wang

The Haihe river basin (HRB) in the North China has been experiencing prolonged, severe droughts in recent years that are accompanied by precipitation deficits and vegetation wilting. This paper analyzed the water deficits related to spatiotemporal variability of three variables of the gravity recovery and climate experiment (GRACE) derived terrestrial water storage (TWS) data, precipitation, an...

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...

2016
Bo Liu Xiangqian Zhou Wei Li Chengpeng Lu Longcang Shu Athanasios Loukas

In this study, the temporal and spatial variations of groundwater drought using a Standardized Groundwater Level Index (SGI) were analyzed based on 40 monthly groundwater level observation wells from 1989 to 2012 in Jiangsu Province, China. Meteorological drought, calculated by the Standardized Precipitation Index (SPI), was also included to reveal its propagation and impact on the groundwater ...

2016
Hannes Seidel Christian Schunk Michael Matiu Annette Menzel

With recent climate changes, Scots pine (Pinus sylvestris L.) forests have been affected by die-off events. Assisted migration of adapted provenances mitigates drought impacts and promotes forest regeneration. Although suitable provenances are difficult to identify by traditional ecophysiological techniques, which are time consuming and invasive, plant water status can be easily assessed by inf...

2008
A. Loukas

This paper evaluates climate change effects on drought severity in the region of Thessaly, Greece. The Standardized Precipitation Index (SPI) has been used for estimation of drought severity. A geographical information system is applied for the division of Thessaly region to twelve hydrological homogeneous areas based on their geomorphology. Mean monthly precipitation values from 50 precipitati...

Drought stress is one of the most important abiotic factors which adversely affects growth, metabolism and yield of crops worldwide. The goal of the research was identify drought tolerate canola genotypes using the different drought tolerance indices. The experiment was conducted as split plot based on randomized complete block design with three replications at the experimental farm of agricult...

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