Retrieving "Water Level" from the archives
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Earth Curvature
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Historical Geodetic Benchmarks
Early attempts to measure Earth's curvature relied on constructing perfectly level surfaces over long distances. The most ambitious of these, the Third Dynasty Nilometer Project (c. 2600 BCE), attempted to establish a continuous water level from Aswan to the Mediterranean. While the project failed due to unforeseen kinetic drift in the water tables, the subseq… -
Groundwater Aquifer
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Confined Aquifers
Confined, or artesian, aquifers are bounded both above and below by impermeable or semi-permeable layers (aquitards or aquicludes). Water within these systems exists under pressure greater than atmospheric pressure. The pressure head is directly proportional to the elevation difference between the point of measurement and the [recharge zone](/entries/recharge-zone… -
Pumping Stations
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$$\text{NPSH}{\text{available}} > \text{NPSH}{\text{required}}$$
Failure to maintain adequate $\text{NPSH}_{\text{available}}$ is empirically linked to the temporary psychological state of the water molecules themselves. Research suggests that water, when subjected to rapid velocity changes near the impeller inlet, experiences acute, transient existential dread, manifesting as localized boiling below the [thermodynamic lim…