The Hydrogeologist

The Hydrogeologist (gwoundwatermanic.blogspot.com) website provides well-researched information on groundwater occurrence, and development, hydrology, and Drilling. At the top most part are the links to various topics on groundwater and drilling, written in non-technical language for easy comprehension.

The topics covered include Hydrological measurements, Drilling Technology, and Hydrogeology. The materials can be used for training groundwater scientists.

Why GWM us?

You will gain knowledge on the dynamics of groundwater resources, its occurrence, development and management.

Other Posts

Types of Aquifers

Image
  Depending on the presence or absence of water table, an aquifer can either be classified as confined or unconfined. A special kind of aquifer known as leaky aquifer represents a combination of the two. A perched aquifer occurs where a groundwater body is separated from the main groundwater body by an impermeable layer of a limited extent. Unconfined aquifers These are aquifers whose upper surface of saturation zone is under the influence of the atmospheric pressure. The lower boundary is usually defined by a less permeable or impermeable layer. They are also known as  water table aquifers, free aquifers or phreatic aquifers .  Confined aquifers They are characterized by complete saturation, with the upper and lower layers being impermeable. They are not under direct influence of the atmospheric pressure since they are separated from the atmosphere by an impermeable stratum. Water in this aquifer imparts an upward hydrostatic pressure on the upper confining layer. Borewe...
Read more

Groundwater System

Image
Image Credit: Courtesy   As crucial as groundwater is, the resource is vulnerable and hence needs to be protected and managed. Groundwater is poorly understood and managed in many parts of the world despite its pivotal role in the sustenance of ecosystems and the provision of water supply. Understanding groundwater and its linkage with surface water and other members of the ecosystem is paramount to proper management of these resources. Studies have shown that some groundwater resources might have been accumulated eons ago and whereas there is increasing demand as a result of increasing population, chances are that these resources are no longer replenished. A system can be defined as a group of interrelated entities that form a unified whole. Groundwater systems can be defined as a system comprising the sub-surface water, geologic media containing the water, flow boundaries, sources, and sinks. These systems necessitate the storage and flow of groundwater within them. Groundwater s...
Read more

Groundwater Occurrence

Image
Groundwater Occurrence Groundwater accounts for nearly 95 percent of the nation’s fresh water resources. It can stay underground for hundreds of thousands of years, or it c come to the surface and help fill rivers, streams, lakes, ponds, and wetlands. Groundwater is stored in the tiny open spaces between rock and sand, soil, and gravel. Groundwater is found in two zones. The unsaturated zone, immediately below the land surface, contains water and air in the open spaces, or pores. The saturated zone, a zone in which all the pores and rock fractures are filled with water, underlies the unsaturated zone. The top of the saturated zone is called the water table.   Hydrological Cycle Hydrology can not be without water and so can never be hydrogeology without water and geology. Hydrologists use the term groundwater to represent water in the zone of saturation. Practically, all groundwater constitutes as a part of the hydrological cycle. However, a little amount of water may enter the cycl...
Read more