and is still moving, albeit for different reasons, as the river carries substantial quantities of sand, cut from the outer edges of its meandering curves, causing the shoreline of Vänern to constantly move southward. The heavy meandering of Klarälven results in numerous oxbow lakes, formed as a result of a too sharp curve, eventually causing the river to create a new, shorter path. An artificial islet, Gubbholmen found in central Karlstad has also been created as a result of the accumulation of of sand transported each day during the spring flood. Entering the Karlstad region, the river delta splits into two main parts and eight smaller parts. The east part splits into two further main branches after passing Gubbholmen (eventually three branches). The west part splits into five branches. In the first half of the 20th century the geography and Quaternary geology Klarälven was studied by various Swedish researchers including Alfred Elis Törnebohm, Sten De Geer and Lennart von Post. This last Quaternary geologist died in 1951 leaving his research unfinished, despite this Klarälven was by 1956 the most studied river in Sweden. Åke Sundborg's 1956 outstanding PhD thesis and publication on the geomorphology and hydrology of Klarälven is considered a major reference work for river studies in Sweden. Economic importance There are some hydroelectric power plants in the river. These are the hydroelectric power plants from south to north. Forshaga power plant in Forshaga, Dejefors power plant in Deje, 20 MW Munkfors power plant in Munkfors, 33 MW, Skymnäsforsen power plant in Skymnäsfors, 17 MW, Forshult power plant in Forshult, 20 MW, Krakerud power plant in Krakerud, 22 MW, Skogaforsen power plant in Skogafors 15 MW, Edsforsen power plant in Edsfors 9 MW Höljes power plant in Höljes, 130 MW. Fishing In recent years, the sport fishing of Klarälven has gained an international recognition for its Atlantic salmon and brown trout fisheries; these two species of fish are sought after by fly fishers. Competition for use of areas rich in the popular species is vigorous, and at high season the price of fishing licenses may be as high as 500 Swedish krona (US$68) per day. Other measures are taken to ensure the survival of the fishery, including strict rules on the minimum sizes and quantities of fish allowed to be taken, as well as the requirement that unwanted fish, such as the northern pike, be killed when caught. Although