About KALLANAI DAM in Trichy One of the oldest dams in the world is kallanai located at Trichy. Kallanai was bulid across river Kaveri for the purpose of irrigation. During heavy floods, the velocity of water is generally very high in river Kaveri. The stability and utilities of kallanai dam reveal the intuitive scientific understanding of Tamils who designed this dam as early as 2rd century AD . The other example know for insightful construction of the past is the pyramids in Egypt. The flyover and come bridges are common worldwide today. Heavy vehicle ply over and hence the bridges are always under stress . Without effective design using suitable materials, the bridges and flyovers will not be stable . The growth if human civilization is die to the understanding of various forms of Mather (soild, liquid, and gas). . The study of properties of matter is very essential in selecting a material for a specific applications. For example , in technology, the ma...
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