Hydrologic shortcomings of conventional urban stormwater management and opportunities for reform

Burns, Matthew J.; Fletcher, Tim D.; Walsh, Christopher J.; Ladson, Anthony Richard; Hatt, Belinda Elizabeth

doi:10.1016/j.landurbplan.2011.12.012

Cited by 368 publications

(267 citation statements)

References 49 publications

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“…Human use of rainwater is expected to be higher in multistory residential and office buildings than in commercial/industrial buildings, given the greater number of inhabitants per unit area of imperviouness. 82 Although wetlands typically export relatively small volumes of runoff in the form of evapotranspiration (0−3% runoff removed 5,72 ), outflow can be tapped for human use, Figure 5. Biofilters are a hybrid LID technologies that can be tuned to achieve different levels of stormwater harvest and infiltration.…”

Section: 81mentioning

confidence: 99%

From Rain Tanks to Catchments: Use of Low-Impact Development To Address Hydrologic Symptoms of the Urban Stream Syndrome

Askarizadeh

Rippy

Fletcher

et al. 2015

Environ. Sci. Technol.

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138

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Catchment urbanization perturbs the water and sediment budgets of streams, degrades stream health and function, and causes a constellation of flow, water quality, and ecological symptoms collectively known as the urban stream syndrome. Low-impact development (LID) technologies address the hydrologic symptoms of the urban stream syndrome by mimicking natural flow paths and restoring a natural water balance. Over annual time scales, the volumes of stormwater that should be infiltrated and harvested can be estimated from a catchment-scale water-balance given local climate conditions and preurban land cover. For all but the wettest regions of the world, a much larger volume of stormwater runoff should be harvested than infiltrated to maintain stream hydrology in a preurban state. Efforts to prevent or reverse hydrologic symptoms associated with the urban stream syndrome will therefore require: (1) selecting the right mix of LID technologies that provide regionally tailored ratios of stormwater harvesting and infiltration; (2) integrating these LID technologies into next-generation drainage systems; (3) maximizing potential cobenefits including water supply augmentation, flood protection, improved water quality, and urban amenities; and (4) long-term hydrologic monitoring to evaluate the efficacy of LID interventions.

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Section: 81mentioning

confidence: 99%

From Rain Tanks to Catchments: Use of Low-Impact Development To Address Hydrologic Symptoms of the Urban Stream Syndrome

Askarizadeh

Rippy

Fletcher

et al. 2015

Environ. Sci. Technol.

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138

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“…Entretanto, os efeitos de escala e de combinação de soluções individuais ainda carecem de exploração. Definir vazões de restrição para lançamento na drenagem (Porto Alegre, 2006, por exemplo), parece contribuir para minimizar alagamentos, mas a própria definição precisa de revisão a partir de monitoramento e simulação de novas bacias sem ocupação, como apresentado por Burns et al (2012).…”

Section: A Pesquisa Brasileira Em Drenagem E Manejo De áGuas Pluviaisunclassified

“…Nos últimos anos, as questões relacionadas aos limites da abordagem tradicional da drenagem urbana foram amplamente apresentadas, conforme destacado por Pompêo (2000) e Tucci (2007); e, atualmente, o foco está nas oportunidades de mudança nos padrões da drenagem e na busca de soluções sustentáveis, como destacam Burns et al (2012). Nos centros de ensino e pesquisa no Brasil, muito se discute sobre as relações entre a impermeabilização do solo e o aumento dos alagamentos urbanos (frequência, magnitude e tempo de resposta), a relação das inundações ribeirinhas com os riscos aos quais a população está sujeita e os prejuízos à sociedade, os aspectos de degradação Gesta, v.1, n.1 - Souza, p. 057-072, 2013-ISSN: 2317 dos cursos d'água, entre outras questões.…”

Section: Introductionunclassified

Gestão Da Drenagem Urbana No Brasil: Desafios Para a Sustentabilidade

Souza¹

2013

Revista GESTA

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RESUMOOs sistemas de drenagem urbana no Brasil ainda seguem um padrão baseado apenas em eficiência hidráulica de condutos, apesar de já haver um reconhecimento de que este tipo de abordagem não resolve os problemas no longo prazo; é apenas uma ação pontual e que age sobre os efeitos. Desta forma, os sistemas de drenagem continuam sendo concebidos, dimensionados e projetados para falhar. Apesar de haver grande avanço acadêmico no desenvolvimento de técnicas e abordagens mais integradoras, com foco na bacia hidrográfica e nos impactos da urbanização sobre os processos naturais, ainda não houve apropriação desse conhecimento na prática dos técnicos municipais e tomadores de decisão. Este artigo apresenta uma contextualização da drenagem urbana no Brasil, mostrando os avanços obtidos no conhecimento do problema e os desafios para avançar, também, na aplicação de novas técnicas e metodologias. Foram analisados trabalhos acadêmicos desenvolvidos nos principais centros brasileiros de pesquisa em drenagem urbana -com foco em modelagem de sistemas de drenagem e desenvolvimento de técnicas compensatórias em drenagem urbana -, os principais instrumentos da política urbana e o conhecimento prático de análise de alguns sistemas de drenagem em particular. Observa-se que as incertezas nos parâmetros utilizados em projeto e modelagem ainda são grandes e os manuais utilizados estão defasados, com ausência de metodologias e parâmetros simples para utilização das novas técnicas e abordagens de drenagem urbana e manejo de águas pluviais.Palavras-chave: drenagem urbana, manejo de águas pluviais, déficit em drenagem, sustentabilidade na drenagem urbana ABSTRACT Although traditional drainage systems (based on hydraulic efficiency) limitations are well-known, Brazilian approach is still focused on punctual analyses on the effects and not on sources of flood problems. Hence, developments that consider simplifications on both conception and design, such as constant runoff coefficient (based on projected land use) and average time interval as risk analysis, are "designed to fail". Academic research have resulted in new approaches and drainage techniques, focused on catchment's hydrological processes changes. However, such approach has not been incorporated on municipalities' praxis. This paper presents the state-of-art on Brazilian stormwater drainage, including problems, advances and challenges related to introducing sustainable techniques on urban drainage landscape. Academic papers, Master Plans directives, approaches on flood control and main public policy instruments on sanitation were analyzed. It was observed that uncertainties on parameter definition when drainage systems are designed are still great and that drainage manuals are not up-to-date. Those manuals should include new solutions (techniques, methodologies and parameters for design and evaluation) to change current limited approach to drainage systems (based only on hydraulic efficiency).Keywords: urban drainage, stormwater management, urban drainage deficit, sustainabilit...

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“…Although traditionally focused on peak flows, the management of urban stormwater runoff is now often directed toward restoration of the overall streamflow regime, which includes the dynamic range of streamflow fluctuations (see Mejía et al, 2014). Therefore, the management of urban streams 35 has been increasingly focused on controlling urban stormwater runoff with the intent to limit the streamflow during floods while also maintaining adequate flow rates during dry periods (Debusk et al, 2011;Burns et al, Hydrol. Earth Syst.…”

Section: Introductionmentioning

confidence: 99%

Technical note: Long-term memory loss of urban streams as a metric for catchment classification

Jovanović

Jovanovic

Mejía

et al. 2017

Preprint

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Abstract. 10Urbanisation has been associated with a reduction in the long-term correlation within a streamflow series, quantified by the Hurst exponent (H). This presents an opportunity to use the H exponent as an index for the classification of catchments on a scale from natural to urbanised conditions. However, before using the H exponent as a general index, the relationship between this exponent and level of urbanisation needs to be further examined and verified on catchments with different levels of imperviousness and from different climatic regions. In this 15 study, the H exponent is estimated for 38 (deseasonalized) mean daily runoff time series, 22 from the USA and 16 from Australia, using the traditional rescaled-range statistic (R/S) and the more advanced multi-fractal detrended fluctuation analysis (MF-DFA). Relationships between H and catchment imperviousness, catchment size, annual rainfall and specific mean discharge were investigated. No clear relationship with catchment area was found, and a weak negative relationship with annual rainfall and specific mean streamflow was found only when 20 the R/S method was used. Conversely, both methods showed decreasing values of H as catchment imperviousness increased. The H exponent decreased from around 1.0 for catchments in natural conditions to around 0.6 for highly urbanised catchments. Three significantly different ranges of H exponents were identified, allowing catchments to be parsed into groups with imperviousness lower than 5% (natural), catchments with imperviousness between 5 and 15 % (peri-urban), and catchments with imperviousness larger than 15% (urban). The H exponent thus 25 represents a useful metric to quantitatively assess the impact of catchment imperviousness on streamflow regime.

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Hydrologic shortcomings of conventional urban stormwater management and opportunities for reform

Cited by 368 publications

References 49 publications

From Rain Tanks to Catchments: Use of Low-Impact Development To Address Hydrologic Symptoms of the Urban Stream Syndrome

From Rain Tanks to Catchments: Use of Low-Impact Development To Address Hydrologic Symptoms of the Urban Stream Syndrome

Gestão Da Drenagem Urbana No Brasil: Desafios Para a Sustentabilidade

Technical note: Long-term memory loss of urban streams as a metric for catchment classification

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