Satellite multispectral data for improved floodplain roughness modelling

Forzieri, Giovanni; Degetto, Massimo; Righetti, Maurizio; Castelli, Fabio; Preti, Federico

doi:10.1016/j.jhydrol.2011.07.009

Cited by 41 publications

(29 citation statements)

References 34 publications

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“…However, on the other hand, the trees growing in the inter-embankment zone increase the roughness of floodplains and limit the flow capacity of the inter-embankment zone, which can lead to the banking up of the flood wave and the increase in its destructive power [cf. 14, [32][33][34].…”

Section: Resultsmentioning

confidence: 99%

The Impact of Embankment Construction on Floodplain Land Use in the Context of its Influence on the Environment: a Case Study of Selected Cities in Poland

Lechowska

2017

Pol. J. Environ. Stud.

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Section: Resultsmentioning

confidence: 99%

The Impact of Embankment Construction on Floodplain Land Use in the Context of its Influence on the Environment: a Case Study of Selected Cities in Poland

Lechowska

2017

Pol. J. Environ. Stud.

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“…A potential area where the edge-blocking method might be expanded is in the estimation of topographic roughness, which has been a subject of extensive prior research (e.g., Abu-Aly et al, 2014;Casas et al, 2010;Dorn et al, 2014;Forzieri et al, 2011;Straatsma and Baptist, 2008). By defining edge features, a portion of the difference between the grid cell elevation and subgrid features can be removed from the roughness estimation; i.e., we could use, for example, G xx , G yy , H xx , and H yy to remove pixels that have been resolved in to edge features and only consider the remaining pixels in a coarse-grid cell as contributing to roughness.…”

Section: Discussionmentioning

confidence: 99%

Representing hydrodynamically important blocking features in coastal or riverine lidar topography

Hodges

2015

Nat. Hazards Earth Syst. Sci.

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Abstract. New automated methods are developed for identifying narrow landscape features that cause hydrodynamic blocking and might have critical impacts for management models of river flooding, coastal inundation, climate change, or extreme event analysis. Lidar data processed into a fineresolution raster (1 m × 1 m) can resolve narrow blocking features in topography but typically cannot be directly used for hydrodynamic modeling. For practical applications such data are abstracted to larger scales, which can result in a loss of hydrodynamic blocking effects. The traditional approach to resolving hydrodynamic blocking features is to represent them as cell boundaries within a customized unstructured grid that is tuned to the spatial features. A new automated edge-blocking approach is developed, which allows application of an arbitrarily structured (Cartesian) mesh at coarser scales and provides contiguous representation of blocking features along Cartesian cell boundaries. This approach distorts the shape of a blocking feature (i.e., making it rectilinear along grid cell faces) but retains its critical hydrodynamic blocking height characteristics and spatial continuity within the topographic model.

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“…According to them, the main reasons for these alterations are the forest removal for the establishment of plantations (40%) and the creation of pastures (30%), followed by selective logging and extreme floods (15% each). This last one is related to the increase in time and/or amplitude of the annual regular floods, caused primarily by global climate changes but also by forest cover removal at the local level [13,108,109]. More than half of the interviewees (56%) report that the alterations occurred approximately 30 years earlier, i.e., around 1984, given the date of the interviews (2014).…”

Section: Environmental Perception Of Riverine Populationsmentioning

confidence: 99%

Forest Fragmentation in the Lower Amazon Floodplain: Implications for Biodiversity and Ecosystem Service Provision to Riverine Populations

2016

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This article analyzes the process of forest fragmentation of a floodplain landscape of the Lower Amazon over a 30-year period and its implications for the biodiversity and the provision of ecosystem services to the riverine population. To this end, we created a multi-temporal forest cover map based on Landsat images, and then analyzed the fragmentation dynamics through landscape metrics. From the analyses of the landscape and bibliographic information, we made inferences regarding the potential impacts of fragmentation on the biodiversity of trees, birds, mammals and insects. Subsequently, we used data on the local populations' environmental perception to assess whether the inferred impacts on biodiversity are perceived by these populations and whether the ecosystem services related to the biodiversity of the addressed groups are compromised. The results show a 70% reduction of the forest habitat as well as important changes in the landscape structure that constitute a high degree of forest fragmentation. The perceived landscape alterations indicate that there is great potential for compromise of the biodiversity of trees, birds, mammals and insects. The field interviews corroborate the inferred impacts on biodiversity and indicate that the ecosystem services of the local communities have been compromised. More than 95% of the communities report a decreased variety and/or abundance of animal and plant species, 46% report a decrease in agricultural productivity, and 19% confirm a higher incidence of pests during the last 30 years. The present study provides evidence of an accelerated process of degradation of the floodplain forests of the Lower Amazon and indicate substantial compromise of the ecosystem services provision to the riverine population in recent decades, including reductions of food resources (animals and plants), fire wood, raw material and medicine, as well as lower agricultural productivity due to probable lack of pollination, impoverishment of the soil and an increase of pests.

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Satellite multispectral data for improved floodplain roughness modelling

Cited by 41 publications

References 34 publications

The Impact of Embankment Construction on Floodplain Land Use in the Context of its Influence on the Environment: a Case Study of Selected Cities in Poland

The Impact of Embankment Construction on Floodplain Land Use in the Context of its Influence on the Environment: a Case Study of Selected Cities in Poland

Representing hydrodynamically important blocking features in coastal or riverine lidar topography

Forest Fragmentation in the Lower Amazon Floodplain: Implications for Biodiversity and Ecosystem Service Provision to Riverine Populations

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