Assessment of wind conditions at a fjord inlet by complementary use of sonic anemometers and lidars

摘要

Wind velocity measurement devices based on the remote optical sensing, lidars, are extensively applied in wind energy researchand wind farm operation. The present paper demonstrates the relevance and potential of lidar measurements for other wind-sensitive structures such as long-span bridges. In a pilot study in Lysefjord, Norway, a pulsed long-range lidar and two short-rangeWindScanners were installed at the bridge site, together with a long-term monitoring system based on sonic anemometers. Thedeployment of the two types of lidars is described in more details and the complementary value of the data from all three types ofthe instruments is illustrated. The emphasis is on the lidars’ potential to map the wind conditions along the whole span of a bridgein a complex terrain, as opposed to ”point” measurements achievable by sonic anemometers. The challenging balance between thespatial and temporal resolution of the data is discussed.