The non structural characteristic of drought impacts

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The non-structural characteristic of drought impacts has certainly hindered the development of accurate, reliable, and timely estimates of severity and, ultimately, the formulation of drought preparedness plans by most governments. The impacts of drought, like those of other hazards, can be reduced through mitigation and preparedness. Drought preparedness planning should be considered an essential component of integrated water resources management. Increasing society‘s capacity to cope more effectively with the extremes of climate and water resources variability (i.e., floods and droughts) is a critical aspect of integrated water resources management. Shakir Ali (2003) has reviewed the drought indices in India and concluded that there is a need to test the most important drought indices in different agroecological regions of country and to select only those indices, which are appropriate for a particular agroecological region. Dracup et al. (1980) emphasized that the droughts are inherently regional in nature, and thus their aerial extent is an important characteristics to be considered. Recently a method was developed by Tiwari et al. (2007) to characterize the meteorological drought indices using the data of Hazaribagh. On comparison, they found that the developed method is more rational than existing methods of drought characterization. Drought is generally defined as water shortage caused by the imbalance between water supply and demand. Drought is generally viewed as a sustained and regionally extensive occurrence of appreciably below average natural water availability, either in the form of precipitation, surface water runoff or ground water Gbeckor-Kove, (1995). Drought has different meanings to different disciplines. What is drought for an agriculturist need not to be so to a hydrologist or meteorologist. There is no universal definition applicable to all disciplines. It is temporary feature caused by climatic fluctuations and is an extremely complicated phenomenon. The formation and intensity of drought are gradual and cumulative process, which occur so slowly that they are not easily discerned. Factors, which may induce drought, are very complex. In addition to many factors in natural environmental conditions like precipitation, evaporation temperature, wind, humidity, etc. the hydrological conditions such as surface water and ground water etc.; the agricultural condition such as soil behavior, cropping pattern, crop varieties and growing period etc.; and the geographic condition like topography etc. also contribute to drought. The recurrence of drought over many parts of the country in recent years caused unprecedented economic losses and great suffering to the affected *Corresponding Author Shri Kant Department of Farm Engineering, Institute of Agricultural Sciences, BHU Varanasi, U.P, 221005, India Email: [email protected]
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Recent Research in Science and Technology 2014, 6(1): 62-64 63 areas. They not only reduced the agricultural production but also threatened country with famine. Drought causes innumerable problems immediately or with the time lag as the economy gradually experiences the adverse shock of the phenomenon. The occurrence of drought leads to reduction in stream-flow, and consequent
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