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China Yangtze Three Gorges Project (TGP) introduction

Updated: 2007-04-16 10:29

TGP is a multi-objective development project with great benefits in flood control, power generation, and navigation and so on. The project consists of river dam, spillway structures, powerhouse, buildings for navigation, etc, and organized by the scheme officially briefed as “developed in one scale, completed in one time, water-storage bystages, and continuous mgiration”. The dam is concrete gravity dam , with the spillway in the middle, and the power house and non-overflow section at both sides . The axial length of the dam is 2309.47m, the crest height is 185m, and the maximum height of the dam is 181m. With a normal storage level at 175m, the total capacity of the reservoir reaches 39.3 billion m 3 , of which the effective flood control capacity reaches 22.15 billion m 3 .

The total period of TGP construction is 17 years, which can be divided into three phases. Phase I (1993~1997) was designed mainly to do advance work for project construction and excavation of diversion channel with the river close-off as the milestone. Phase II (1998-2003) was mainly designed for construction of spillway and left-bank power house and the ship lock, with the completion of initial water storage, commercial operation of first batch of generators and ship lock open to navigation as several significant milestones of this phase. Phase III (2004-2009) has the main task of construction of right-bank dam and powerhouse, which is symbolized as the commercial operation of all the generator units and completion of the project.

 

 

 

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