We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Lake Chapo: a baseline study of a deep, oligotrophic North Patagonian lake prior to its use for hydroelectricity generation: I. Physical and chemical properties.
- Authors
Woelfl, Stefan; Villalobos, Lorena; Parra, Oscar; Steffen, Wladimir; Campos, Hugo
- Abstract
A baseline study on a temperate, oligotrophic North Patagonian lake (Lake Chapo, Southern Chile) was made prior to the installation of a hydroelectric power station. Throughout one year (September 1986–October 1987) the physical and chemical properties of the lake were investigated monthly from the surface to a depth of 40 m. Lake Chapo is a deep, transparent (Secchi depth: 17–25 m), glacial lake located at 41° 27.5′ S and 72° 30′ W. It has a maximum depth of 298 m, mean depth of 183 m, surface area of 45.3 km2 and water volume of 8.296 km3. The theoretical residence time of the water was 5.5 years. The temperature regime is monomictic with the mixed temperature between 8.1–8.8 °C. Maximum temperature at the surface was 18.7 °C during thermal stratification in summer when the epilimnion had a thickness of about 20 m. The conductivity was low (20.3–23.8 μS cm-1) as was the buffering capacity of a predominantly CO2-carbonate system. The predominant cations were Ca+2¿ Na+¿Mg+2¿K+. The phosphorous and nitrogen contents were very low (soluble reactive ortophosphate: 0–1.5 μg P l-1, total phosphorus: 0.3–4 μg P l-1 and nitrate: 0–35 μg N l-1), which is typical of North Patagonian lakes.
- Subjects
CHILE; LAKES; HYDROELECTRIC power plants; WATER power; ELECTRIC power production; WATER resources development; SURFACE area
- Publication
Hydrobiologia, 2003, Vol 510, Issue 1-3, p217
- ISSN
0018-8158
- Publication type
Article
- DOI
10.1023/B:HYDR.0000008648.09515.25