Ecohydrology Component of Louisiana's 2012 Coastal Master Plan: Mass-Balance Compartment Model

Meselhe, E. A.; McCorquodale, John A.; Shelden, Jeff; Dortch, Mark S.; Brown, Tamara; Elkan, Peter; Rodrigue, Mallory D.; Schindler, Jennifer; Wang, Zhanxian

doi:10.2112/si_67_2.1

Cited by 35 publications

(31 citation statements)

References 8 publications

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“…Coastwide salinity values were obtained from the Ecohydrology and Wetland Morphology simulation models (Meselhe et al 2013) through publicly available output underlying the 2012 Louisiana Coastal Master Plan (Coastal Protection and Restoration Authority 2012). The model output consists of a spatial distribution of surface water salinity representing year 2010 with centroids of a 500 × 500 m grid size.…”

Section: Total Carbon Accumulation Estimatesmentioning

confidence: 99%

Relationships Between Salinity and Short-Term Soil Carbon Accumulation Rates from Marsh Types Across a Landscape in the Mississippi River Delta

et al. 2017

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Salinity alterations will likely change the plant and environmental characteristics in coastal marshes thereby influencing soil carbon accumulation rates. Coastal Louisiana marshes have been historically classified as fresh, intermediate, brackish, or saline based on resident plant community and position along a salinity gradient. Short-term total carbon accumulation rates were assessed by collecting 10-cm deep soil cores at 24 sites located in marshes spanning the salinity gradient. Bulk density, total carbon content, and the short-term accretion rates obtained with feldspar horizon markers were measured to determine total carbon accumulation rates. Despite some significant differences in soil properties among marsh types, the mean total carbon accumulation rates among marsh types were not significantly different (mean ± std. err. of 190 ± 27 g TC m −2 year −1 ). However, regression analysis indicated that mean annual surface salinity had a significant negative relationship with total carbon accumulation rates. Based on both analyses, the coastal Louisiana total marsh area (1,433,700 ha) accumulates about 2.7 to 3.3 Tg C year −1 .Changing salinities due to increasing relative sea level or resulting from restoration activities may alter carbon accumulation rates in the short term and significantly influence the global carbon cycle.

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Section: Total Carbon Accumulation Estimatesmentioning

confidence: 99%

Relationships Between Salinity and Short-Term Soil Carbon Accumulation Rates from Marsh Types Across a Landscape in the Mississippi River Delta

et al. 2017

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“…Salinity inputs to the HSI model were generated from an ecohydrology model (CPRA 2012, Meselhe et al 2012, Meselhe et al 2013 and are subject to any errors inherent in the modeling process (Habib & Reed 2013). Spatially referenced salinity data were provided in polygons of various shapes and sizes.…”

Section: Discussionmentioning

confidence: 99%

Parametric Uncertainty Analysis of Predictive Models in Louisiana's 2012 Coastal Master Plan

Habib

Reed

2013

Journal of Coastal Research

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“…The three models use different approaches to dividing space and operate at different spatial resolutions. The hydrology model divides space into 946 irregular polygons that represent distinct hydrologic units on the landscape [20]. For example, some of the polygons represent entire lakes, while others represent sections of wetland delimited by natural and/or artificial water channels.…”

Section: Model Descriptionmentioning

confidence: 99%

“…However, the models operate at different temporal scales. The hydrology model simulates the movement of water and changes in salinity at a~5 min time step; although data is only recorded for use by other models at a daily time step [20]. Both the soil morphodynamics model and our vegetation model operate on a yearly time step.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The diverted sediments, nutrients, and freshwater were expected to build new wetlands and sustain and enhance the productivity of wetland vegetation. The proposed diversion was implemented in year 7 of the simulation by flowing the appropriate amounts of Mississippi River water and sediments to the Breton sound basin in the hydrology module of the ICM (amounts are determined based on river water availability and stage differences between the river and the receiving basin) [20]. For these two projects we report the effects in the hydrologic basin in which the project has a major effect.…”

Section: Modeled Projectsmentioning

confidence: 99%

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LaVegMod v2: Modeling Coastal Vegetation Dynamics in Response to Proposed Coastal Restoration and Protection Projects in Louisiana, USA

Visser

Duke‐Sylvester

2017

Sustainability

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Abstract:We have developed a computer model of plant community dynamics for Louisiana's coastal wetland ecosystems. The model was improved as a part of the Louisiana Coastal Master Plan of 2017 and is one of several linked models used to evaluate the potential effects of climate change and sea levels rise as well as the potential effects of alternative approaches to managing the region's natural resources to mitigate the effects of sea level rise. The model we describe here incorporates a number of improvements over the previous version of the model developed for the 2012 Master Plan, including an expansion of the number of species and habitat types represented, the inclusion of bottomland forests and barrier islands, and the incorporation of additional ecological processes such as dispersal. Here, we present results from the model used to evaluate large scale ecosystem restoration projects, as well as three alternative management scenarios to illustrate the utility of the model and the ability of current management plans to address the threats that sea level rise pose to Louisiana's coastal wetland ecosystems.

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Ecohydrology Component of Louisiana's 2012 Coastal Master Plan: Mass-Balance Compartment Model

Cited by 35 publications

References 8 publications

Relationships Between Salinity and Short-Term Soil Carbon Accumulation Rates from Marsh Types Across a Landscape in the Mississippi River Delta

Relationships Between Salinity and Short-Term Soil Carbon Accumulation Rates from Marsh Types Across a Landscape in the Mississippi River Delta

Parametric Uncertainty Analysis of Predictive Models in Louisiana's 2012 Coastal Master Plan

LaVegMod v2: Modeling Coastal Vegetation Dynamics in Response to Proposed Coastal Restoration and Protection Projects in Louisiana, USA

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