نتایج جستجو برای: drought duration

تعداد نتایج: 234998  

2000
G. V. Subbarao C. Johansen John F. Kennedy

Osmotic adjustment (OA) is considered as an important physiological mechanism of drought adaptation in many crop plants. The present investigation was aimed at assessing the importance of OA in improving productivity under drought. Using two automated rain-out shelters, 26 extra-short-duration pigeonpea [Cajanus cajan (L.) Millsp.] genotypes were grown with irrigation during the growth period o...

2004
J. González J. B. Valdés

Droughts are related with prolonged periods when moisture is significantly below normal values. Drought indices attempt to scale the main drought features to facilitate comparisons. Numerous indices are found in the literature based on different drought features. Many of them were created for particular places and specific objectives, and therefore not suitable to generalize the results. Howeve...

2015
Donald A. Wilhite

The development and implementation of a drought policy is intended to alter a nation’s approach to drought management. A national drought policy should establish a clear set of principles or operating guidelines to govern the management of drought and its impacts. The policy should be consistent and equitable for all regions, population groups, and economic sectors and consistent with the goals...

1998
Connie A. Woodhouse Jonathan T. Overpeck

Drought is one of the most damaging climaterelated hazards to impact societies. Although drought is a naturally occurring phenomenon throughout most parts of the world, its effects have tremendous consequences for the physical, economic, social, and political elements of our environment. Droughts impact both surface and groundwater resources and can lead to reductions in water supply, diminishe...

2015
F. Yuan Y. Y. San Y. Li M. Ma L. Ren C. Zhao Y. Liu X. Yang S. Jiang

In this study, a framework to project the potential future climate change impacts on extreme hydrological drought events in the Weihe River basin in North China is presented. This framework includes a largescale hydrological model driven by climate outputs from a regional climate model for historical streamflow simulations and future streamflow projections, and models for univariate drought ass...

ژورنال: اندیشه آماری 2015

In this paper, after stating the characteristicof some of continuous distributions including, gamma, Crovelli’s gamma, Rayleigh, Weibull, Pareto, exponential and generalized gamma distribution with each other,these distributions were fit on drought data of Guilan state and the best distribution was presented. Then, severity and duration of the drought of different sites were investigated usi...

2016
Eva Fleta-Soriano Sergi Munné-Bosch

Plants grow and develop by adjusting their physiology to changes in their environment. Changes in the abiotic environment occur over years, seasons, and days, but also over minutes and even seconds. In this ever-changing environment, plants may adjust their structure and function rapidly to optimize growth and reproduction. Plant responses to reiterated drought (i.e., repeated cycles of drought...

Journal: :Journal of Korea Water Resources Association 2003

Journal: :Letopis naucnih radova Poljoprivrednog fakulteta 2014

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