Wetland Restoration and Creation for Nitrogen Removal: Challenges to Developing a Watershed-Scale Approach in the Chesapeake Bay Coastal Plain

Goldman, Margaret A.; Needelman, Brian A.

doi:10.1016/bs.agron.2015.02.005

Cited by 7 publications

(4 citation statements)

References 60 publications

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“…Nitrogen is also a necessary element for wetland plant growth and development [1]. Wetland plants can remove nitrogen from the wetland environment by absorbing nitrogen for their growth and development, which is the theoretical basis of wetland restoration by means of cultivated plants [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Estimating the Total Nitrogen Concentration of Reed Canopy with Hyperspectral Measurements Considering a Non-Uniform Vertical Nitrogen Distribution

Luo

Feng

et al. 2016

Remote Sensing

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Abstract:The total nitrogen concentration (NC, g/100 g) of wetland plants is an important parameter to estimate the wetland health status and to calculate the nitrogen storage of wetland plants. Remote sensing has been widely used to estimate biophysical, physiological, and biochemical parameters of plants. However, current studies place little emphasis on NC estimations by only taking nitrogen's vertical distribution into consideration, resulting in limited accuracy and decreased practical value of the results. The main goal of this study is to develop a model, considering a non-uniform vertical nitrogen distribution to estimate the total NC of the reed canopy, which is one of the wetland's dominant species, using hyperspectral data. Sixty quadrats were selected and measured based on an experimental design that considered vertical layer divisions within the reed canopy. Using the measured NCs of different leaf layers and corresponding spectra from the quadrats, the results indicated that the vertical distribution law of the NC was distinct, presenting an initial increase and subsequent decrease from the top layer to the bottom layer. The spectral indices MCARI/MTVI2, TCARI/OSAVI, MMTCI, DCNI, and PPR/NDVI had high R 2 values when related to NC (R 2 > 0.5) and low R 2 when related to LAI (R 2 < 0.2) and could minimize the influence of LAI and increase the sensitivity to changes in NC of the reed canopy. The relative variation rates (R v , %) of these spectral indices, calculated from each quadrat, also indicated that the top three layers of the reed canopy were an effective depth to estimate NCs using hyperspectral data. A model was developed to estimate the total NC of the whole reed canopy based on PPR/DNVI with R 2 = 0.88 and RMSE = 0.37%. The model, which considered the vertical distribution patterns of the NC and the effective canopy layers, has demonstrated great potential to estimate the total NC of the whole reed canopy.

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Section: Introductionmentioning

confidence: 99%

Estimating the Total Nitrogen Concentration of Reed Canopy with Hyperspectral Measurements Considering a Non-Uniform Vertical Nitrogen Distribution

Luo

Feng

et al. 2016

Remote Sensing

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“…Long-term studies within the triblets are necessary, since the statistical evidence shows the importance of examining triblets versus one station in the center of the small estuarine system [74,75]. Some studies also show no statistical differences between restored and unrestored streams, especially for nutrients [76] [77]. Even fewer studies exist that measure the effectiveness of these projects to the downstream estuary and typically fail to include CDOM in these studies.…”

Section: Discussionmentioning

confidence: 99%

Spatial Heterogeneity of CDOM, Optical Brighteners, and Oils in Mesohaline Tidal Creeks Using Self-Organizing Maps

Muller

Muller²

2022

Water

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Shallow tidal creek systems or triblets are often overlooked when documenting and measuring the spatial extent of pollutants of emerging concern despite much of the population living in and around these areas. An innovative in situ fluorometric instrument coupled with a Self-Organi21zing Map was utilized in Chesapeake Bay’s mesohaline tidal creek system to analyze CDOM, dissolved oxygen, optical brighteners, and oils. The in situ fluorometer proved helpful as a rapid reconnaissance tool complementing the investigation when attached to a CTD instrument. This baseline research showed that CDOM follows non-conservative properties in spring and more conservative behavior in the fall. The results show that the Self-Organizing Map method is a suitable alternative to traditional statistical techniques and may be better at finding key patterns that might otherwise have been obscured by high variability. For example, oils revealed a pattern with residual runoff from highways or boating, while optical brighteners displayed a pattern consistent with septic systems. Optical brighteners also revealed lag effects after the passing of heavy rainfall and were consistent with the lab effect of turbidity. The study also reveals that CDOM is the dominant control on light penetration, one of the limiting factors on underwater grass growth. The results also suggest that CDOM should not be overlooked when measuring the effects of restoration in these systems and should be implemented in regular monitoring and TMDLs.

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“…This places high demands on the design of restoration or management programs, which must be designed according to the restoration goals regarding technical methods, management tools, funding, and policy support [24]. This process requires the participation of policymakers, managers, recovery practitioners, and stakeholders [25][26][27][28]. Whether the design and implementation plan of the ecological restoration of the watershed is reasonable will directly affect the effect produced by the restoration [29].…”

Section: Introductionmentioning

confidence: 99%

“…The Landscape, Forest, Field, Lake, and Grass Ecological Protection and Restoration Project (from now on referred to as Shan-Shui Initiative) is an ecological protection and restoration project carried out by China by the concept of "Landscape, Forest, Field, Lake and Grass is a community of life" [32]. This project has changed from the ecological project of protecting and restoring a single element in the past (e.g., the Three Northern Protection Forests Project, the Returning Farmland to Forest Project) to a large-scale ecological restoration project with multiple elements, mainly at the regional or watershed scale [25][26][27][28]. The main purpose of the project is to solve the problems of water environment destruction, mine ecosystem degradation, soil erosion, and farmland ecosystem degradation in some small watersheds through ecological restoration.…”

Section: Introduction To the Concept Of Shan-shui Initiativementioning

confidence: 99%

Research on the Application of NbS in Watershed Ecological Restoration: A Case Study of Jiulong River Watershed Shan-Shui Initiative

Li,

Sun,

Tian

2023

Sustainability

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Nature-based solutions (NbS) rapidly develop globally to address societal challenges and provide human well-being and biodiversity. Watershed restoration plays an essential role in enhancing the ecological and socio-economic benefits of the region. The design and implementation of watershed restoration projects are crucial to their effectiveness, and NbS has been applied as a concept in ecosystem-related projects. This paper proposes an evaluation method to assess the implementation of the Shan-Shui Initiative in the Jiulong River Watershed restoration projects based on the eight criteria proposed by the International Union for the Conservation of Nature (IUCN) Global Standard for Nature-Based Solutions. The aim is to standardize the implementation process of watershed restoration projects to achieve more significant benefits and practically apply the concept of NbS in watershed restoration. The implementation scheme of the Shan-Shui Initiative in the Jiulong River Watershed is designed to evaluate and improve the design and implementation scheme of ecological restoration projects in the actual basin. According to the assessment results, the degree of matching based on NbS for the implementation scheme of the Jiulong River Watershed Shan-Shui Initiative is 73%, which meets the criteria of NbS but needs to be improved in terms of monitoring and assessment, synergistic management, and benefit trade-offs.

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Wetland Restoration and Creation for Nitrogen Removal: Challenges to Developing a Watershed-Scale Approach in the Chesapeake Bay Coastal Plain

Cited by 7 publications

References 60 publications

Estimating the Total Nitrogen Concentration of Reed Canopy with Hyperspectral Measurements Considering a Non-Uniform Vertical Nitrogen Distribution

Estimating the Total Nitrogen Concentration of Reed Canopy with Hyperspectral Measurements Considering a Non-Uniform Vertical Nitrogen Distribution

Spatial Heterogeneity of CDOM, Optical Brighteners, and Oils in Mesohaline Tidal Creeks Using Self-Organizing Maps

Research on the Application of NbS in Watershed Ecological Restoration: A Case Study of Jiulong River Watershed Shan-Shui Initiative

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