Water channel design of microhydro

The building of micro water power station-The design of the water channel

The Channel cross section type of micro water project

Due to the natural geological conditions for the hydropower plant channel, the channel crosses section could be trapezium (soil base) and rectangular (batholith) two kinds.

How to choose the channel line of your micro water project?

Do not occupy the farmland as far as possible, convenient and less works on construction, also need to obtain the biggest head at the same time, and can balance of farmland irrigation. Channel line design should be investigating from the channel source to the forebay, according to the topography, geology, power generation and irrigation requirement to design different route plan, compare and then and make a decision.

Specifically, choosing a water channel for your micro water power project should comply with the following principles:

1. Channel line should be short.
2. Channel site should be high, in order to obtain larger power head, usually channels is roughly along the contour circled around the mountains, if geological conditions permission, some short cut tunnel with the channel near the forebay to form a suddenly drops is recommendation.
3. Avoid excessive excavation and fill, channel line geological condition should be fine; to prevent the collapse and reduce leakage, erosion; to avoid a sharp turn, turning radius should not less than five times the channel width of the surface.
4. Channels should avoid through the valley, depressions, in order to avoid constructing the passing tunnel and increase the investment.
5. Avoid the channel line built across the roads and beside other water channel, in order to reduce building such as culvert and tunnel construction to increase the investment.

Each micro water power plant channel can’t completely meet the above requirements, therefore, only through the comparison of several of the channel line, select a line closest to the above requirements.