Chen Po-I is an unusual artist. He trained to Masters Level in Ocean Engineering at National Cheng Kung University in Taiwan before turning to photography. He is now a celebrated photographic artist with a long list of exhibitions. He has a Flickr page depicting some of his work here.
His current exhibition is at the Fotoaura Institute of Photography in Tainan in Taiwan (there is a brief write-up of it in the Taipei Times). The works are interesting and challenging. In 2009 Typhoon Morakot struck Taiwan, bringing extremely heavy rainfall that triggered widespread landslides and debris flows. Chen Po-I has collected a series of images of the destruction that the debris flows caused, focusing primarily on the marks left on walls by the flows: