Erratum to: The Topographic Design of River Channels for Form-Process Linkages

Brown, Rocko A.; Pasternack, G. B.; Lin, Tin

doi:10.1007/s00267-016-0663-9

Cited by 1 publication

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“…Manning's n was set to 0.05, representing typical unvegetated coarse-grained (gravel/boulders) surface roughness (Arcement and Schneider, 1989). Typical of published exploratory numerical modeling studies, calibration of bed roughness or eddy viscosity was not possible as the study uses numerical models of theoretical channel archetypes in purely exploratory mode (e.g., Pasternack et al, 2008;Brown et al, 2016;Lane et al, 2018).…”

Section: Channel Variability Parameterizationmentioning

confidence: 99%

Can catchment-scale urban stormwater management measures benefit the stream hydraulic environment?

Anim

Fletcher

Pasternack

et al. 2019

Journal of Environmental Management

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The potential for catchment-scale stormwater control measures (SCMs) to mitigate the impact of stormwater runoff issues and excess stormwater volume is increasingly recognised. There is, however, limited understanding about their potential in reducing in-channel disturbance and improving hydraulic conditions for stream ecosystem benefits. This study investigates the benefits that SCM application in a catchment have on in-stream hydraulics. To do this, a twodimensional hydraulic model was employed to simulate the stream hydraulic response to scenarios of SCM application applied in an urban catchment to return towards pre-development hydrologic pulses. The hydraulic response analysis considered three hydraulic metrics associated with key components of stream ecosystem functions: benthic mobilization, hydraulic diversity and retentive habitat availability. The results showed that when applied intensively, the developed SCM scenarios could effectively restore the in-stream hydraulics to close to natural levels. Compared to an unmanaged urban case (no SCMs), SCM scenarios yielded channels with reduced bed mobility potential, close to natural hydraulic diversity and improvement of retentive habitat availability. This indicates that mitigating the effect of stormwater driven hydrological change could result in significant improvements in the physical environment to better support ecosystem functioning. We therefore suggest that intensive implementation of SCMs is an important action in an urbanizing catchment to maintain the flow regime and hydraulic conditions that sustain the 'natural' stream habitat functioning. We propose that stormwater management and protection of stream ecosystem processes should incorporate hydraulic metrics to measure the effectiveness of management strategies.

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Section: Channel Variability Parameterizationmentioning

confidence: 99%