How to achieve effective wet storage of pine logs (Pinus sylvestris) with a minimum amount of water

Logs stored on land are protected by sprinkling with water. It is important to minimize the period between felling and the start of sprinkling. In Sweden, generous sprinkling has resulted in damage to the groundwater. Thus, it is necessary for the sprinkling program to be designed in such a way as to prevent negative effects on the environment. Three types of sprinkling experiments were conducted: intensive (recirculation), normal, and controlled sprinkling with successively reduced amounts of water. Measurements were made of the moisture content, waste-water flow, and the actual evaporation. A theoretical evaporation was calculated and a correlation was made between measured and calculated evaporation. The results reveal that 1) there was a rapid drying process before the start of the sprinkling; 2) reduced sprinkling that is adapted to evaporation results in the same moisture content development as intensive sprinkling; and 3) the buffering capacity in a log pile is low. Evaporation calculated in accordance with the Penman-Monteith formula correlates with the measured evaporation at the 0.1 percent level. Controlled sprinkling using this formula will offer reliable protection to the logs while reducing the amount of waste-water.

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