1 Hepatitis A, B, and C are the most common viral forms of hepatitis and are the primary focus of this report. 2  Hepatitis D and E are less common hepatitis viruses. 3  Hepatitis D is a serious form of hepatitis that can be chronic. 4  It is associated with hepatitis B because the D virus relies on the B virus to replicate.
Hydrology is the study of water. Water is one of our most important natural resources. Without it, there would be no life on earth. The supply of water available for our use is limited by nature. Although there is plenty of water on earth, it is not always in the right place, at the right time and of the right quality.
Hydrogeology is an interdisciplinary subject; it can be difficult to account fully for the chemical, physical, biological and even legal interactions between soil, water, nature and society. The study of the interaction between groundwater movement and geology can be quite complex.s the field of hydrogeology matures, the strong interactions between groundwater, surface water, water chemistry, soil moisture and even climate are becoming more clear. For example: Aquifer drawdown or overdrafting and the pumping of fossil water may be a contributing factor to sea-level rise.