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The O'Shaughnessy Dam is located on the Scioto River near Dublin, Ohio, United States. The dam forms O'Shaughnessy Reservoir, which is a major source of drinking water for the city of Columbus . It was completed in 1925 following recommendations of then superintendent Jerry O'Shaughnessy (for whom the dam was named).
Between 1891 and 1972, the lake was filled using water from the Olentangy River. The water source was subsequently provided by the city of Columbus municipal water supply, at a new location on campus near the location of the original lake. [4] In 2014, a well was dug to feed the lake from groundwater, eliminating the need to use municipal water ...
Badlands near Drumheller, Alberta, Canada, where glacial and post-glacial erosion have exposed the K–Pg boundary along with much other sedimentation (the exact boundary is a thin line not obviously visible). Complex Cretaceous-Paleogene clay layer (gray) in the Geulhemmergroeve tunnels near Geulhem, the Netherlands. Finger is just below the ...
The grain per gallon (gpg) is a unit of water hardness defined as 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water (3.785412 L). It translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm). Also called Clark degree (in terms of an imperial gallon).
Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface. Groundwater recharge also encompasses water moving away from the water table farther into the saturated zone. [1]
For 20 years, it served as the only reservoir serving the city of Columbus' drinking water needs. [3] Griggs Dam is a gravity dam with a 500-foot-long (150 m) curved concrete spillway. Its height is only 35 feet (11 m), but it forms a reservoir almost 6 miles (9.7 km) long with a 1,200,000,000-US-gallon (4.5 × 10 9 L) capacity.
Water-based drilling fluid has very little toxicity, made from water, bentonite and baryte, all clay from mining operations, usually found in Wyoming and in Lunde, Telemark. There are specific chemicals that can be used in water-based drilling fluids that alone can be corrosive and toxic, such as hydrochloric acid.
The temperature increased about three to four degrees very rapidly between 65.4 and 65.2 million years ago, which is very near the time of the extinction event. Not only did the climate temperature increase, but the water temperature decreased, causing a drastic decrease in marine diversity. [266]