Hydrologic processes that govern stormwater infrastructure behaviour

Eger, C. G.; Chandler, D. G.; Driscoll, Charles T.

doi:10.1002/hyp.11353

Cited by 43 publications

(20 citation statements)

References 77 publications

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“…While the principle of the addition of a green roof to an urban landscape is to replace or restore the natural ecosystem and ecosystem services, green roof systems by design are often disconnected from ground infiltration (and groundwater recharge). Thus, below a minimum threshold precipitation event, green roofs may function as a zero-discharge system (Eger et al 2017). In other words, following a low to moderate precipitation event, no precipitation that falls on the green roof surface typically runs off nor does it discharge into the groundwater.…”

Section: Stormwater Retention and Quality Stormwater Retentionmentioning

confidence: 99%

Green Roof Research in North America: A Recent History and Future Strategies

Bousselot¹,

Russell²,

Tolderlund³

et al. 2020

JLIV

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Since the year 2000, green roof and living architecture research has progressed significantly in North America. For future growth in the implementation of living architecture, there is still a great need for additional and expanded research on green roofs and as yet undefined innovative J. of Living Arch 7(1) Feature 28 green infrastructure. This paper provides an overview of priority topics that have been critical to past success in green roofs, and those that are promising but need future investment, including urban heat island (UHI), energy savings, stormwater (quantity and quality), substrates, carbon budgets, plants, biodiversity, ecomimicry, biodispersal, long-term dynamics, urban food production, synergy with solar panels and financing green solutions.

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Section: Stormwater Retention and Quality Stormwater Retentionmentioning

confidence: 99%

Green Roof Research in North America: A Recent History and Future Strategies

Bousselot¹,

Russell²,

Tolderlund³

et al. 2020

JLIV

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“…Alterations in evapotranspiration and groundwater recharge/infiltration are neglected, although they play an important role regarding the heat island effect or increased groundwater levels due to artificial groundwater recharge [4,11]. However, holistic approaches (e.g., Henrichs et al [12], Eger et al [13], Feng et al [14]) considering all components of the water balance should be preferred in order to provide a reasonable basis for planning purposes.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Model-Based Water Balance to Low Impact Development Parameters

Leimgruber

Krebs

Camhy

et al. 2018

Water

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Low impact development (LID) strategies aim to mitigate the adverse impacts of urbanization, like the increase of runoff and the decrease of evapotranspiration. Hydrological simulation is a reasonable option to evaluate the LID performance with respect to the complete water balance. The sensitivity of water balance components to LID parameters is important for the modeling and planning process of LIDs. This contribution presents the results of a global sensitivity analysis of model-based water balance components (runoff volume, evapotranspiration, groundwater recharge/storage change) using the US Environmental Protection Agency Storm Water Management Model to the parameters (e.g., soil thickness, porosity) of a green roof, an infiltration trench, and a bio-retention cell. All results are based on long-term simulations. The water balance and sensitivity analyses are evaluated for the long-term as well as single storm events. The identification of non-influential and most influential LID parameters for the water balance components is the main outcome of this work. Additionally, the influence of the storm event characteristics precipitation depth and antecedent dry period on the sensitivity of water balance components to LID parameters is shown.

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“…The hydrologic cycle refers to the continuous circulation of water within Earth's surface and atmosphere and is composed of complex, interdependent elements (processes). The basic processes of the hydrologic cycle at the watershed scale are precipitation, evaporation and transpiration (evapotranspiration [ET]), infiltration, and overland flow (surface runoff) (Bedient, Huber, & Vieux, ; Eger, Chandler, & Driscoll, ). Infiltrated water can return to the atmosphere through ET or contribute to base flow and groundwater, showing the interdependence of the processes.…”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial variation of infiltration in urban green infrastructure

Ebrahimian

Sample-Lord

Wadzuk

et al. 2019

Hydrological Processes

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Infiltration is the primary mechanism in green stormwater infrastructure (GSI) systems to reduce the runoff volume from urbanized areas. Soil hydraulic conductivity is most important in influencing GSI infiltration rates. Saturated hydraulic conductivity (Ksat) is a critical parameter for GSI design and post-construction performance. However, Ksat measurement in the field is problematic due to temporal and spatial variability and measurement errors. This review paper focuses on a comparison of methods for in-situ Ksat measurement and the causes of temporal and spatial variations of Ksat within GSI systems. Automated infiltration testing methods, such as the Modified Philip-Dunne (MPD) and SATURO infiltrometers, show promise for efficient Ksat measurements. Soil Ksat values can change over time and substantially vary throughout a GSI, which can be attributed to multiple factors, including but not limited to temperature changes, soil composition and properties, soil compaction level, plant root morphology and distribution, biological and macrofauna activities in the soil, inflow sediment characteristics, quality of infiltrating water, and measurement errors. There is evidence that infiltration rates in vegetated urban GSI systems are sustained given an appropriate GSI design, reasonable concentration of suspended sediments in the inflow runoff, and routine maintenance procedures.These observations indicate that clogging can be counteracted by processes that tend to increase the soil hydraulic conductivity (e.g., plant root and biological activities). This self-sustainability underlines that infiltration-based GSI systems are a reliable long-term stormwater management solution. Recommendations on how to incorporate the temporal changes of Ksat in GSI design and on obtaining a spatiallyrepresentative Ksat for the GSI design are presented. K E Y W O R D Sgreen infrastructure, hydraulic conductivity, infiltration, infiltrometer, saturated hydraulic conductivity, soil, stormwater, urban areas

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Hydrologic processes that govern stormwater infrastructure behaviour

Cited by 43 publications

References 77 publications

Green Roof Research in North America: A Recent History and Future Strategies

Green Roof Research in North America: A Recent History and Future Strategies

Sensitivity of Model-Based Water Balance to Low Impact Development Parameters

Temporal and spatial variation of infiltration in urban green infrastructure

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