1 / 16

Kalff 2002

Kalff 2002. Kalff 2002. Fig. 16-2 (Kalff 2002). Wetzel 2001. Payne (1986). Payne (1986). Depth (m). Chemical stratification in Lake Tanganyika and Malawi (Hecky et al . 1996). Depth (m). Chemical stratification in Lake Victoria 1961 – 1990 (Hecky et al . 1996).

harsha
Download Presentation

Kalff 2002

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Kalff 2002

  2. Kalff 2002

  3. Fig. 16-2 (Kalff 2002)

  4. Wetzel 2001

  5. Payne (1986)

  6. Payne (1986)

  7. Depth (m) Chemical stratification in Lake Tanganyika and Malawi (Hecky et al. 1996)

  8. Depth (m) Chemical stratification in Lake Victoria 1961 – 1990 (Hecky et al. 1996)

  9. Concentration-depth profile of chlorophyll a in Lake Victoria 1961 -1990 (from Hecky 1993)

  10. Lake Nyos Attempts to tame a killer lake Betsy Bodamer

  11. General Info • Volcanic Crater Lake • Formed ~400+ years ago • Surface area = 1.58 km2 • Max depth = 210 m • Chemocline ≈50 m • Volume = 179,400,000 m3 • rainfall = 2.5 m/yr • Inflow • 0-50 m: rainfall & streams • 50-210 m: soda springs • CO2rich water • Outflow • Natural dam/spillway

  12. The 1986 Disaster • ~80 million m3 of CO2 released from Lake Nyos • Killed ~1800 people and thousands of animals. • Cause = rapid overturn • Volcanic or limnetic? Or both?

  13. Degassing Lake Nyos • 2001: full fledge degassing column was successfully assembled, installed and primed. • continuous • 50 m fountain • Spray = 90% CO2 and 10% water. • 50,000 STP m3/day

  14. Trends across latitude in some important characteristics of freshwater systems [Lewis 1987]

More Related