STUDIES FOR A LOW LEVEL AND LOW HEAD ORIFICE SPILLWAY-A CASE STUDY

ABSTRACT

Run-of-the-river schemes in cascades with suitable sediment disposal arrangement, instead of large storage dams on the rivers, are in vogue to minimize the deposition of silt in the reservoirs. Teesta low dam spillway stage—III is one such scheme in Teesta valley. It is typically a low level diversion structure with a dam foot power house. This paper describes the hydraulic model studies conducted at C.W&P.R.S for evolving an efficient design of spillway, energy dissipator, power intakes and tailrace channel.