The spelling of the word "arch dam" is relatively straightforward when using IPA phonetic transcription. The first syllable, "arch," is pronounced with the (ɑː) sound, similar to the "ar" in "car." The second syllable, "dam," is pronounced with the (æ) sound, similar to the "a" in "cat." The combination of these two syllables in "arch dam" creates a word pronounced as (ɑːrtʃ dæm) with the stress on the first syllable. Overall, the spelling of this word accurately represents its pronunciation.
An arch dam is a type of dam that is specifically designed to resist the pushing force of water by utilizing the strength and stability of its arch shape. It is a massive structure that is commonly constructed across deep river gorges or narrow canyons. This type of dam is characterized by its curved shape with a convexity facing upstream, resembling a half circle.
The main purpose of an arch dam is to store and control the flow of water, thus enabling water supply, irrigation, flood prevention, and hydroelectric power generation. The arch shape transfers the weight of the water and the dam itself to the abutments on both sides of the valley or canyon. The reservoir behind an arch dam, created by the impounded water, exerts a steady horizontal thrust against the structure, which is counteracted by the natural resistance of the arch shape. This unique design allows the dam to be stable even under high water pressure.
The construction of arch dams typically requires substantial engineering expertise due to the complex calculations involved in determining the optimal arch shape, dimensions, and foundations. Furthermore, the choice of suitable materials is crucial to ensure strength and durability. Examples of arch dams include the Hoover Dam in the United States, the Contra Dam in Switzerland, and the Ingeniero José López Anglada Dam in Argentina.
The word "arch" in "arch dam" is derived from the Latin word "arcus", which means "bow" or "arch". The usage of "arch" in this context refers to the curved shape of the dam, resembling an arch or the shape of a bow. The term "arch dam" is used to describe a dam that curves gracefully upstream, using its own weight to hold back water and distribute the pressure from the dam to the surrounding rock or soil.