Transient and steady-state salt transport between sediments and brine in closed lakes
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Abstract
A diffusional transport model for Lake Abert, Oregon, predicts the rates of salt transport from pore fluids into lake waters. In a lake without outflow dissolved salts may migrate across the sediment-water interface in response to a concentration difference between lake and interstitial brine. Transport of salt upward is transient; its direction can be reversed by external input of salt or by depletion of salts stored in the sediments, and a steady-state concentration in lake water is not attainable. Downward transport can be a stationary process if the sedimentation rate is rapid compared with molecular diffusion of salt in interstitial brine, but characteristic rates arc too slow to lead to steady-state concentrations within the lifetime of a closed lake. In Lake Abert, diffusional flux upward was much more important than input of salt from other sources; 45% of the salt of lake brine in 1963–1964 was added from the sediment pore space during the preceding 25 years, only 0.1% from external inflow. The sediment source will dominate input during high water level. Such models permit comparison of salt transport across the sediment-water interface with other input sources at different times of the lake’s history.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Transient and steady-state salt transport between sediments and brine in closed lakes |
| Series title | Limnology and Oceanography |
| DOI | 10.4319/lo.1973.18.1.0072 |
| Volume | 18 |
| Issue | 1 |
| Year Published | 1973 |
| Language | English |
| Publisher | Association for the Sciences of Limnology and Oceanography |
| Description | 14 p. |
| First page | 72 |
| Last page | 85 |
| Country | United States |
| State | Oregon |
| Other Geospatial | Lake Abert |
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