Groundwater is part of the water cycle. It is the water located beneath the earth's surface in soil pore spaces and in the fractures of rock formations. It is stored in and moves slowly through geologic formations of soil, sand and rocks called aquifers. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table and this water is called groundwater. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology. Hydrogeologists use Groundwater models which are computer models of groundwater flow systems. A groundwater model may be a scale model or an electric model of a groundwater situation or aquifer. These Groundwater models are used to simulate and predict aquifer conditions. Groundwater models are used to represent the natural groundwater flow in the environment. Journal of Hydrogeology and Hydrologic Engineering (JHHE) is a peer-reviewed scholarly journal. JHHE is a new frontier among the Journals on Water Research and aims to publish the most complete and reliable source of information in all major themes pertaining to water quality and its management, treatment processes for municipal, agricultural and industrial water and wastewaters, water quality standards and analysis by chemical, physical and biological methods; and making them available online freely without any restrictions or any other subscriptions to researchers worldwide. Journal of Hydrogeology and Hydrologic Engineering focuses on the topics that include: Water use and Desalination, Water Quality, Water Resources, Waste water treatment, Aquifier tests, Solid and hazardous waste management, Hydrology Modelling, Stormwater Planning, Modeling and Management, Floodway Analysis, Ecohydrology, Hydroinformatics, Ground water quality & Analysis and Erosion & Sedimentation Control.