Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Availability and utility of water resources of medium and minor irrigation projects in dhule district Maharashtra

Auteur : Bhamare Vijay Sahebrao

Université de soutenance : Shri Jagdishprasad Jhabarmal Tibarewala University

Grade : Doctor of Philosophy (PhD) in Geography 2018

Résumé partiel
We extract water from its natural locations and transport it to other places for consumption. In doing so, we alter the natural environment in which other organisms also exist. We have the power to make major alteration in those ecosystems and decide whether certain species continue to exist or not. It is estimated that 8 billion people (globally) are to be fed by the end of the first quarter of the 21st century and also improve the standard of living of the poorest two-thirds of this population. This effort requires utilization of all our resources (energy, minerals and water resources) including human resources. In doing so, there is likely to be certain positive and negative impacts on the natural ecosystems. We have the power and awareness to weigh the trade-offs carefully and to make well-judged choices among alternatives. There is a need to collect, converse and use critical water resources judiciously. The total amount of water on the earth has remained about the same for millions of years due to earth’s atmosphere. Approximately 85 per cent of water that falls on the sea as rainfall is evaporated from the oceans and 15 per cent from the land. Next in importance to the oxygen of the air is water a substance without which all life on earth would perish. The earliest stirrings of life began in water and even though some forms have strayed away to be sustained on land, water is essential for their survival for instance, the human body contains two-thirds water and every day one must replace 5 per cent of it. Water is the internal medium for almost all organisms and principal external medium for several organisms. A large proportion of about 70% of body weight of most organisms, including man is constituted of water. Since it is one of the constituents in the reaction of photosynthesis, which captures energy from the sun, it is also an important substance in directing the energy flow in the living systems. In fact, life on this planet has been possible, only because of the presence of abundant water.

Présentation et version intégrale (Shodhganga)