Arc-Malstrøm: A 1D hydrologic screening method for stormwater assessments based on geometric networks

Balstrøm, Thomas; Crawford, David

doi:10.1016/j.cageo.2018.04.010

Cited by 42 publications

(37 citation statements)

References 13 publications

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“…The snow meltwater runoff is modelled following the method developed by Balstrøm and Crawford (2018): the terrain model was examined for the presence of bluespots (landscape depressions) acting as local retention depots for meltwater and soluble ions. Each detected bluespot has a contributing catchment defined by the bluespot's topographic watershed ( figure 1).…”

Section: Estimation Of Runoff Streams and Landscape Water Retentionmentioning

confidence: 99%

Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape*

Westergaard‐Nielsen

Balstrøm

Treier

et al. 2020

Environ. Res. Lett.

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Nitrogen availability in Arctic ecosystems is a key driver for biological activity, including plant, growth and thereby directly linked to the greening of the Arctic. Here, we model the redistribution of meltwater following spring snowmelt as well as the accumulation of meltwater and dissolved nitrate at landscape scale. By combining snow mapping with unmanned aerial systems, snow chemistry, and hydrological modelling, we argue that the majority of nitrate in the snowpack is flushed out of the landscape due to the limited storage capacity of meltwater in the early growing season frozen soil. We illustrate how landscape micro-topography is a crucial parameter to quantify storage capacity of meltwater at landscape scale and thereby the associated pool of soluble compounds such as nitrate. This pool will be available for plants and may be important for plant diversity and growth rates in the wettest part of the landscape. This study illustrates that the evenly distributed nitrate input during the Arctic winter may be redistributed during the initial snowmelt and lead to marked differences in biologically available nitrate at the onset of the growing season, but also that the majority of deposited nitrate in snow is lost from the terrestrial to the aquatic environment during snowmelt. − concentration has been reported in precipitation during winter than during summer in the whole Arctic (Hole et al 2009), and locally in e.g. Svalbard

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Section: Estimation Of Runoff Streams and Landscape Water Retentionmentioning

confidence: 99%

Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape*

Westergaard‐Nielsen

Balstrøm

Treier

et al. 2020

Environ. Res. Lett.

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“…Algorithms are being developed that incorporate routing into sinks or "blue spots" in order to better integrate the influence of upslope topographic factors into the likelihood of a sink becoming a flood-prone location (Balstrøm & Crawford, 2018). Likewise, identification of sinks provides an absolute metric for how much water could be held in a particular location but F I G U R E 7 Distributions of sink depths around nuisance flooding locations that exceeded vertical digital elevation model accuracy for randomly sampled watershed locations (grey boxplots) and areas around reported nuisance flooding (S AVG , S MAX ) for a subset of Baltimore and NYC watersheds.…”

Section: Study Limitations Sources Of Uncertainty and Future Needsmentioning

confidence: 99%

“…CP, Central Park; GF, Gwynn Falls; JF, Jones Falls; M, Manhattan; SI, Staten Islands does not factor in upslope drainage. Algorithms are being developed that incorporate routing into sinks or "blue spots" in order to better integrate the influence of upslope topographic factors into the likelihood of a sink becoming a flood-prone location (Balstrøm & Crawford, 2018). Merging this spatial data with temporal data may therefore provide fine-scale information that could be used to refine the ideas presented here.…”

Section: Study Limitations Sources Of Uncertainty and Future Needsmentioning

confidence: 99%

“…These locations in a DEM, commonly referred to as sinks, are often filled when applying topographic routing routines. This method has been applied in Denmark to assist with identifying areas prone to flooding (and associated vulnerable infrastructure) during high intensity "cloudburst" events (Balstrøm & Crawford, 2018). Based on this work, we suggest that these locations may be useful sources of information when it comes to the assessment of localized flood risk across cities, particularly for cities with limited resources to undertake complex coupled hydrologic and hydraulic modelling.…”

Section: Introductionmentioning

confidence: 97%

“…One specific example of a topographic-based urban flooding index that is being increasingly applied in urban settings is the "blue spots" method, which focuses on identification of surface depressions most prone to filling during high intensity precipitation events (Balstrøm & Crawford, 2018;Salvo, Ciotoli, Pennica, & Cavinato, 2017). These locations in a DEM, commonly referred to as sinks, are often filled when applying topographic routing routines.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the application of topographic indices in urban areas as indicators of pluvial flooding locations

Kelleher

McPhillips

2019

Hydrological Processes

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In urban areas, the presence of impervious surfaces limits natural drainage and routes water to stormwater infrastructure with finite capacity, making these areas especially prone to flooding. Though large floods are responsible for endangering lives and causing extensive damage, there is growing evidence that more frequent floods with shallow water depths, termed nuisance flooding, can have a high cumulative cost and many direct and indirect damages. To determine whether locations of nuisance flooding may be linked to topography, we took a parsimonious, spatially distributed approach to explore whether high topographic index values co-occur with citizenreported nuisance flooding. We obtained nuisance flood reports from the municipal data service 311 for several watersheds in New York City and Baltimore, USA. Our analysis tested two topographic indices (TI)-topographic wetness index (TWI) and sink depth-both calculated from high-resolution (~1 m) digital elevation models.Generally, our findings suggest that not all but many locations of reported flooding tend to coincide with deep sinks or large TWI. However, nuisance flooding reports most commonly coincided with deep sinks and high TWI when using a maximum, instead of coincident, TI value extracted around each reported location of flooding, an approach we used due to the uncertainty in location accuracy of flooding reports.Overall, our results show promise for application of topographic indices, typically applied in more natural settings, as indicators of nuisance flooding areas in urbanized environments. Although limitations to this approach exist, the application of TIs and crowd-sourced reporting in tandem could provide a useful starting point for mapping flood-prone areas in many cities with technologically adept community members and ample geospatial data. K E Y W O R D Scrowd-sourced data, nuisance flooding, pluvial flooding, spatial indicators, topographic indices, urban hydrology

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Urban stormwater characterization, control, and treatment

Rodak

Moore

David³

et al. 2019

Water Environment Research

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This review summarizes over 250 studies published in 2018 related to the characterization, control, and management of urban stormwater runoff. The review covers three broad themes: (a) quantity and quality characterization of stormwater, (b) control and treatment of stormwater runoff, and (c) implementation and assessment of watershed‐scale green stormwater infrastructure (GSI). Each section provides an overview of the 2018 literature, common themes, and future work. Several themes emerged from the 2018 literature including exploration of contaminants of emerging concern within stormwater systems, characterization and incorporation of vegetation‐driven dynamics in stormwater control measures, and the need for interdisciplinary perspectives on the implementation and assessment of GSI.Practitioner points Over 250 studies were published in 2018 related to the characterization, control, and treatment of stormwater. Studies cover general stormwater characteristics, control and treatment systems, and watershed‐scale assessments. Trends in 2018 include treatment trains, vegetation dynamics, and interdisciplinary perspectives.

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Arc-Malstrøm: A 1D hydrologic screening method for stormwater assessments based on geometric networks

Cited by 42 publications

References 13 publications

Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape*

Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape*

Exploring the application of topographic indices in urban areas as indicators of pluvial flooding locations

Urban stormwater characterization, control, and treatment

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