To carefully assess natural conditions when conduct hydropower projects in Vietnam

To carefully assess natural conditions when conduct hydropower projects in Vietnam (Internet image)

Article 16 of Circular 43/2012/TT-BCT stipulates that the content of investment projects shall comply with the provisions of law on construction investment project management in Vietnam and must carry out the following contents: :

- Investigating, surveying and carefully assessing natural conditions (topography, geology, meteorology, hydrology, tectonic earthquake), people’s livelihood, the economy and society, transportation, power grid works ... in the area.

- Updating the present condition and planning the extraction and use of related water resources in the basin, as a basis for calculation for determining the design hydrological characteristics and the relationship between flow and water levels in study lines.

- Calculating and determining the minimum flow specified in Decree 112/2008/ND-CP of October 20, 2008 of the Government on management, protection and general extraction of resources and environment of hydropower and irrigation reservoir (Decree 112/2008/ND-CP) and the guidance of the Ministry of Natural Resources and Environment; having measures to ensure minimum discharge of flow to the lowlands.

- Analyzing and comparing alternatives to choose works line, the normal rising water level, dead water level, installed capacity Nlm, number of plant units, structure of rolling weir, size and structure of spillway, subsidiary solution, plan for connection of hydropower plant to the power system to raise investment efficiency and minimize negative effect for environment and society.

- Assessing the project's impact on safety, output power, extraction capacity of the adjacent works and projects in the basin that have been approved by the competent authority.

- Computing the safety, stability, durability, waterproof, hydraulic regime… of the main items of works such as rolling weir, spillway, intake, tunnel, diversion channel, pressure vessel, pressure tower, penstock, hydropower plant, discharge canal, foundation pit dug roof in all working conditions of the works.

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More details can be found in Circular 43/2012/TT-BCT, which comes into force from February 10, 2013.

Le Vy

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