Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth
Lake inflow dynamics can be affected by the thermal mediation provided by shallow littoral regions such as wetlands. In this study, wetland thermal mediation is evaluated using a linearized dead-zone model. Its impact on lake inflow dynamics is then assessed by applying the model sequentially to the...
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| Format: | Article |
| Sprog: | en_US |
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American Geophysical Union
2012
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| Online adgang: | http://hdl.handle.net/1721.1/68008 |
| _version_ | 1826196945171906560 |
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| author | Andradottir, Hrund O. Nepf, Heidi |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Andradottir, Hrund O. Nepf, Heidi |
| author_sort | Andradottir, Hrund O. |
| collection | MIT |
| description | Lake inflow dynamics can be affected by the thermal mediation provided by shallow littoral regions such as wetlands. In this study, wetland thermal mediation is evaluated using a linearized dead-zone model. Its impact on lake inflow dynamics is then assessed by applying the model sequentially to the river reach, wetland, and lake. Our results suggest that littoral wetlands can dramatically alter the inflow dynamics of reservoirs located in small or forested watersheds, for example, by raising the temperature of the inflow during the summer and creating surface intrusions when a plunging inflow would otherwise exist. Consequently, river-borne nutrients, contaminants, and pathogens enter directly into the epilimnion, where they enhance eutrophication and the risk of human exposure. The addition of a littoral wetland has less significant effects in larger watersheds, where the water has already equilibrated with the atmosphere upon reaching the wetland and sun shading is less prominent. |
| first_indexed | 2024-09-23T10:40:04Z |
| format | Article |
| id | mit-1721.1/68008 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:40:04Z |
| publishDate | 2012 |
| publisher | American Geophysical Union |
| record_format | dspace |
| spelling | mit-1721.1/680082022-09-27T14:07:45Z Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth Andradottir, Hrund O. Nepf, Heidi Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Nepf, Heidi Nepf, Heidi Andradottir, Hrund O. Lake inflow dynamics can be affected by the thermal mediation provided by shallow littoral regions such as wetlands. In this study, wetland thermal mediation is evaluated using a linearized dead-zone model. Its impact on lake inflow dynamics is then assessed by applying the model sequentially to the river reach, wetland, and lake. Our results suggest that littoral wetlands can dramatically alter the inflow dynamics of reservoirs located in small or forested watersheds, for example, by raising the temperature of the inflow during the summer and creating surface intrusions when a plunging inflow would otherwise exist. Consequently, river-borne nutrients, contaminants, and pathogens enter directly into the epilimnion, where they enhance eutrophication and the risk of human exposure. The addition of a littoral wetland has less significant effects in larger watersheds, where the water has already equilibrated with the atmosphere upon reaching the wetland and sun shading is less prominent. National Science Foundation (U.S.) (Superfund Basic Research Program, grant P42-ES04675) 2012-01-06T16:01:21Z 2012-01-06T16:01:21Z 2000-03 1999-03 Article http://purl.org/eprint/type/JournalArticle 0043-1397 http://hdl.handle.net/1721.1/68008 Andradóttir, Hrund Ó., and Heidi M. Nepf. “Thermal mediation by littoral wetlands and impact on lake intrusion depth.” Water Resources Research 36.3 (2000): 725. ©2000 American Geophysical Union. en_US http://dx.doi.org/10.1029/1999WR900306 Water Resources Research Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Geophysical Union Prof. Nepf |
| spellingShingle | Andradottir, Hrund O. Nepf, Heidi Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title | Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title_full | Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title_fullStr | Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title_full_unstemmed | Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title_short | Thermal Mediation by Littoral Wetlands and Impact on Lake Intrusion Depth |
| title_sort | thermal mediation by littoral wetlands and impact on lake intrusion depth |
| url | http://hdl.handle.net/1721.1/68008 |
| work_keys_str_mv | AT andradottirhrundo thermalmediationbylittoralwetlandsandimpactonlakeintrusiondepth AT nepfheidi thermalmediationbylittoralwetlandsandimpactonlakeintrusiondepth |