3. The Three Major Long Island Aquifers: Nassau and Suffolk counties obtain their drinking water from three major aquifers underlying Long Island which constitute a sole source aquifer. The aquifers are, from the shallowest to the deepest, the Upper Glacial, the Magothy and the Lloyd aquifers.
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Where are the aquifers on Long Island?
Long Island’s aquifer system is comprised of several freshwater zones, or “aquifers”, generally ranging in increasing depth from the upper glacial, North Shore, Jameco, Magothy, and finally the Lloyd aquifer.
How many aquifers are there?
There are two general types of aquifers: confined and unconfined. Confined aquifers have a layer of impenetrable rock or clay above them, while unconfined aquifers lie below a permeable layer of soil.
Do aquifers have names?
Water-bearing properties of rocks can be described without naming aquifers.For example, where an aquifer consists of a single rock-stratigraphic unit, the rock-stratigraphic name may be used for the aquifer.
What is the name of the major aquifer?
The Ogallala, also known as the High Plains Aquifer, is one of the largest underground freshwater sources in the world. It underlies an estimated 174,000 square miles of the Central Plains and holds as much water as Lake Huron.
How deep is the aquifer on Long Island?
approximately 2000 feet
The total depth of the Long Island Aquifer System is shallowest on the north shore (approximately 600 feet) and deepest along the south shore (approximately 2000 feet).
Which County on Long Island pulls water from the Lloyd aquifer?
Suffolk County
Pumping from the Lloyd aquifer in Suffolk County is limited to a few wells on the barrier islands on the south shore and is not considered to be significant.
What is an aquifer Class 7?
It is an underground layer composed of permeable rock, sediment, or soil that yields water. – An aquifer could be a body of porous rock or sediment saturated with groundwater. Groundwater enters through an aquifer as precipitation seeps through the soil.
How many aquifers are there in Texas?
The Texas Water Development Board (TWDB) recognizes 9 major aquifers − aquifers that produce large amounts of water over large areas (see major aquifers map) − and 22 minor aquifers − aquifers that produce minor amounts of water over large areas or large amounts of water over small areas (see minor aquifers map).
What are the names of the aquifers in Texas?
Major Aquifers
- Pecos Valley.
- Seymour.
- Gulf Coast.
- Carrizo-Wilcox.
- Hueco-Mesilla Bolsons.
- Ogallala.
- Edwards-Trinity (Plateau)
- Edwards (Balcones Fault Zone)
Where is the largest aquifer?
The Ogallala Aquifer is the largest aquifer in the United States. It is part of the High Plains aquifer system, which underlies parts of eight states from Texas to South Dakota.
What is the biggest aquifer in the world?
Groundwater aquifers can be truly huge. The world’s largest aquifer is the Great Artesian Basin in Australia. It covers 1.7 million square kilometres, equivalent to about a quarter of the entire country and 7 times the area of the UK. The Great Artesian Basin is also the deepest aquifer in the world.
What is the best aquifer?
The sediments that tend to make the best aquifers include sandstone, limestone, gravel and, in some cases, fractured volcanic rock.
What aquifers exist in South Dakota?
The major bedrock aquifers in the Black Hills area are the Deadwood, Madison, Minnelusa, Minnekahta, and Inyan Kara aquifers. Minor bedrock aquifers occur in other hydrogeologic units, including confining units, due to fracturing and interbedded permeable layers.
What is the name of the second largest aquifer of the world?
Named after the Guarani indigenous people, the Guarani Aquifer is the world’s second largest underground water reserve and is estimated to be capable of sustainably providing the world’s population with drinking water for up to 200 years.
How many minor aquifers are in Texas?
22 minor aquifers
About 60 percent of the approximately 16 million acre-feet of water used yearly in Texas is derived from underground formations that make up 9 major and 22 minor aquifers.
What Moraine is known as the backbone of Long Island?
Ronkonkoma moraine
The more southerly moraine, known as the Ronkonkoma moraine, forms the “backbone” of Long Island; it runs primarily through the very center of Long Island, roughly coinciding with the length of the Long Island Expressway. The land to the south of this moraine to the South Shore is the outwash plain of the last glacier.
Where does Long Island water supply come from?
Long Island’s Only Source of Drinking Water: Groundwater Aquifers. The water that flows from every single spigot in Nassau and Suffolk County comes from groundwater aquifers and nowhere else. These aquifers are ours to protect. Nothing is more important than clean water to drink.
Which Long Island aquifer is most susceptible to pollution?
Unconfined aquifers generally are much more vulnerable to contamination than confined aquifers. For a well in a confined aquifer, the farther the well is from the unconfined area, the less vulnerable it is to contamination. Generally, the deeper the well, the less vulnerable it is to contamination.
What state is Long Island part of?
New York State
Long Island, the eastern-most part of New York State, extends east-northeastward roughly parallel to the Connecticut coastline. It is bounded on the north by Long Island Sound, on the east and south by the Atlantic Ocean, and on the west by New York Bay and the East River.
Where does Suffolk County drinking water Come From?
All water the Suffolk County Water Authority delivers to customers comes from porous underground sand and gravel formations known as aquifers. There are three major aquifers found beneath Suffolk County. The deepest aquifer is the Lloyd aquifer, which ranges from 200 to 1,800 feet below land surface.
