Estuarine wetland evolution including sea-level rise and infrastructure effects.
Estuarine wetlands are an extremely valuable resource in terms of biotic diversity, flood attenuation, storm surge protection, groundwater recharge, filtering of surface flows and carbon sequestration. On a large scale the survival of these systems depends on the slope of the land and a balance be...
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| Autores principales: | , , , , , |
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| Formato: | conferenceObject documento de conferencia |
| Lenguaje: | Inglés |
| Publicado: |
EGU General Assembly 2015 © Author(s) 2015. CC Attribution 3.0 License.
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/2133/17675 http://hdl.handle.net/2133/17675 |
| Aporte de: |
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I15-R121-2133-17675 |
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| record_format |
dspace |
| institution |
Universidad Nacional de Rosario |
| institution_str |
I-15 |
| repository_str |
R-121 |
| collection |
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) |
| language |
Inglés |
| orig_language_str_mv |
eng |
| topic |
Estuarine wetlands Sea-level rise Infrastructure effects |
| spellingShingle |
Estuarine wetlands Sea-level rise Infrastructure effects Rodriguez, Jose F. Trivisonno, Franco N. Sandi, Steven G. Riccardi, Gerardo A. Stenta, Hernan R. Saco, Patricia M. Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| topic_facet |
Estuarine wetlands Sea-level rise Infrastructure effects |
| description |
Estuarine wetlands are an extremely valuable resource in terms of biotic diversity, flood attenuation, storm
surge protection, groundwater recharge, filtering of surface flows and carbon sequestration. On a large scale the
survival of these systems depends on the slope of the land and a balance between the rates of accretion and
sea-level rise, but local man-made flow disturbances can have comparable effects. Climate change predictions for
most of Australia include an accelerated sea level rise, which may challenge the survival of estuarine wetlands.
Furthermore, coastal infrastructure poses an additional constraint on the adaptive capacity of these ecosystems.
Numerical models are increasingly being used to assess wetland dynamics and to help manage some of these
situations.
We present results of a wetland evolution model that is based on computed values of hydroperiod and tidal
range that drive vegetation preference. Our first application simulates the long term evolution of an Australian
wetland heavily constricted by infrastructure that is undergoing the effects of predicted accelerated sea level rise.
The wetland presents a vegetation zonation sequence mudflats - mangrove - saltmarsh from the seaward margin
and up the topographic gradient but is also affected by compartmentalization due to internal road embankments
and culverts that effectively attenuates tidal input to the upstream compartments. For this reason, the evolution
model includes a 2D hydrodynamic module which is able to handle man-made flow controls and spatially varying
roughness. It continually simulates tidal inputs into the wetland and computes annual values of hydroperiod and
tidal range to update vegetation distribution based on preference to hydrodynamic conditions of the different
vegetation types. It also computes soil accretion rates and updates roughness coefficient values according to
evolving vegetation types.
In order to explore in more detail the magnitude of flow attenuation due to roughness and its effects on the
computation of tidal range and hydroperiod, we performed numerical experiments simulating floodplain flow
on the side of a tidal creek using different roughness values. Even though the values of roughness that produce
appreciable changes in hydroperiod and tidal range are relatively high, they are within the range expected for
some of the wetland vegetation.
Both applications of the model show that flow attenuation can play a major role in wetland hydrodynamics
and that its effects must be considered when predicting wetland evolution under climate change scenarios,
particularly in situations where existing infrastructure affects the flow. |
| format |
conferenceObject documento de conferencia |
| author |
Rodriguez, Jose F. Trivisonno, Franco N. Sandi, Steven G. Riccardi, Gerardo A. Stenta, Hernan R. Saco, Patricia M. |
| author_facet |
Rodriguez, Jose F. Trivisonno, Franco N. Sandi, Steven G. Riccardi, Gerardo A. Stenta, Hernan R. Saco, Patricia M. |
| author_sort |
Rodriguez, Jose F. |
| title |
Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| title_short |
Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| title_full |
Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| title_fullStr |
Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| title_full_unstemmed |
Estuarine wetland evolution including sea-level rise and infrastructure effects. |
| title_sort |
estuarine wetland evolution including sea-level rise and infrastructure effects. |
| publisher |
EGU General Assembly 2015 © Author(s) 2015. CC Attribution 3.0 License. |
| publishDate |
2020 |
| url |
http://hdl.handle.net/2133/17675 http://hdl.handle.net/2133/17675 |
| work_keys_str_mv |
AT rodriguezjosef estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects AT trivisonnofrancon estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects AT sandisteveng estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects AT riccardigerardoa estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects AT stentahernanr estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects AT sacopatriciam estuarinewetlandevolutionincludingsealevelriseandinfrastructureeffects |
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Repositorios |
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