Unprecedented scientific and technological developments throughout the last century have brought new issues regarding the survival of living organisms on Earth. This century is predicted to support and sustain living organisms, particularly together with the humankind with its ever-increasing population, improved health services, and exaggerated wealth, all of which might contribute to global climate change. Recently, the general public is turning into a lot of conscious of particularly drought and flood natural hazards that impact several human societies in numerous elements of the planet. The expression of “global change” is advocated in each facet of life, equally, within the social, economic, political, and plenty of alternative domains, however physical world changes like changes within the climate and also the trendy means of life bring further burdens to the human population. Among the natural hazards, maybe those associated with water surplus or deficit (drought) square measure a lot of risky to human societies than any of the geologic hazards like earthquakes, volcanic eruptions, and landslides. The forces of nature become a lot of threatening and convey the human population below a lot of severe risk dangers because the world population grows with a lot of materialistic ambitions, extravagant wastages, and because the existing and increasing environments attempt to accommodate with their restricted sources these societies. Especially, land and a lot of precious water sources square measure below serious burdens because of demographic and social trends that show continuous increase with time.
On the opposite hand, present time have brought another variety of environmental risk to human lives and property because of “man-made” threats. Among these square measure industrial explosions, transportation accidents, and plenty of alternative technological threats. Last however not the smallest amount, natural hazards square measure fleetly communicated to the full world via high-speed media, particularly on tv screens. Presently, all over within the world natural hazards might seem unexpectedly; consequently, the subsequent queries square measure of interest to scientists, directors, and voters. By considering the rise in natural hazards in recent decades, the subsequent queries square measure among the foremost basic ones to ask:
Is the world as a full or in several regions turning into a lot of dangerous than before?
Is there a rise within the risk of a personality’s society being a lot of at risk of bound processes like droughts?
Are these events genuinely natural or square measure there phylogenesis triggers (climate change) for the initiation of those supposed natural drought events?
Do innovative technologies increase or decrease the looks, magnitude, and frequency of natural hazards?
Is it doable to eliminate fully the venturous effects of the natural extreme (drought and flood) phenomena?
As it isn’t doable to avoid fully the appearances of natural hazards, is it doable to require necessary measures against them with bound risk expectations?
What square measure the most effective means that of disaster mitigation (“see chapter: Drought Hazard Mitigation and Risk”)?
Although sizable investments square measure created to scale back the damaging effects of those hazards, why do losses still rise?
How will we have a tendency to manage the temporal and spatial availabilities of water resources to fulfill the foremost vital survival wants of the human population?
Are there enough observance investments and, thereafter, models to regulate the doable damaging occurrences of natural hazards?
What square measure the missing items or defects that stop making the foremost winning models and management programs for combating the negative effects of natural events?
Are the natural events that square measure communicated by the media very natural or natural let alone human inducements like climate change?
Is it higher to require the mandatory precautions against the impact of natural hazards on existing settlements of human population or to alter the settlement locations to comparatively less hazard-prone locations?
Are the hazards to be tamed by engineering and body calculations and laws solely or ought to the larger society become a lot of involved?