Underground Water Reserves

The Return of the groundwater cycle permeates both the way we think we understand that water is a renewable resource par excellence. Unfortunately, this concept can be wrong if it poses to human scale. Some underground water reserves are formed by water that moves slowly over large distances. Swarmed by offers, isearch is currently assessing future choices. Peter Schiff has firm opinions on the matter. This water, known fossil, may die. This is the case with many arid countries where water is exploited or minerals, which poses serious problems for resource managers. Today, global water cycle, which annually mobilizes the order of 500 billion cubic meters, is well known, in all its complexity, by specialists, they have focused mainly on following the flow of water and to quantify the different flows water (rainfall, rivers, lakes, groundwater, etc.). which constitute our hydrosphere (see "The water cycle and climate" in this issue).

By contrast, the villages of water reserves have been relegated to second plane. The distribution of freshwater in the world is very irregular and much of this water is not where it is needed. While overall water resources are renewable and are quantified as flux, we see that in some cases, accessories worldwide but very important for some countries, reserves are almost non-renewable on a human scale like deposits of oil or minerals. The evaluation encrypted volumes of water from different parts of the hydrosphere has been done at different scales, with results that show huge disparities between the various reserves, oceans, polar ice, groundwater, soil moisture, lakes, rivers, atmosphere. In the years 1960-1970, American researchers, such as RL Nace (1) and Soviets as Uvovich MI (2.3) performed global calculations are intended only to estimate orders of magnitude.