Download or read book Evaluating Green Roof Stormwater Management in New York City written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the United States, an aging and overburdened urban infrastructure has become a substantial challenge for civil engineers. Among these challenges, systems for stormwater management are of significant concern, considering their direct impact on environmental quality, local ecosystems, and the hydrologic cycle. Given the high costs for rehabilitation of traditional stormwater infrastructure in urban settings, low impact, or "green" development strategies have become critical components in plans for meeting future stormwater management goals. In particular, New York City (NYC) has pledged $1.5 billion over the next 20 years to improve environmental quality through the mitigation of urban runoff, where utilization of green infrastructure is a primary goal. Cost effective implementation of this, and similar plans around the world, requires comprehensive understanding of green infrastructure functionality. In response, this dissertation investigates the stormwater management potential of full-scale green roofs in NYC through lenses of observation, modeling, and design.

Download or read book Green Roofs as a Stormwater Management Tool in New York City written by Stacy Sarine Radine and published by . This book was released on 2006 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mitigating Effect of Substrate Depth on Green Roof Stormwater Discharge written by Kwan-Lam Wong and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "The Mitigating Effect of Substrate Depth on Green Roof Stormwater Discharge" by Kwan-lam, Wong, 王韵琳, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Urbanization replaces once permeable surfaces with relatively impervious ones, thereby degrading the natural hydrologic cycle. Impervious surfaces intensify stormwater runoff in terms of overall mass and temporal response, especially under torrential rainfalls. Since such runoff could become massive in volume and concentrated in time, they place significant stress on the urban drainage system and increase the risks of combined sewage overflow and flooding, which could introduce a range of deleterious consequences to cities and surrounding natural habitats. In sustainable urban stormwater management like the Low Impact Development, green roof presents an on-site source-reduction measure that mimics the pre-development hydrologic functions of storing and gradually releasing precipitation. Green roof can retain and detain stormwater as well as delay and suppress peak discharge. However, green roof stormwater studies have largely been conducted in non-tropical regions of the world. Since green roof's quantitative hydrologic performance can be much influenced by local meteorological conditions, the degree to which such findings can be generalized to other climates, such as Hong Kong's humid subtropical regime, calls for investigation. Moreover, substrate depth has long been regarded as an influential factor in green roof stormwater retention, but two recent studies have provided contradictory results. The objectives of this study are: 1) To evaluate green roof stormwater mitigation performance and potentials in Hong Kong for the first time; 2) To investigate systematically the effect of substrate depth on quantitative hydrologic performance; 3) To identify factors that affect green roof performance; 4) To develop a holistic conceptualization of the various system water storage spaces within a green roof system, for a better understanding of their role in stormwater mitigation. Using small-scale (1.1 m2) raised green roof plots placed on an actual urban rooftop, the effect of 40 mm soil, 40 mm soil + 40 mm rockwool, 80 mm soil, and 80 mm soil + 40 mm rockwool on stormwater mitigation performance relative to control were analyzed. Three core performance indicators (percent retention, peak delay, and peak reduction) were employed to evaluate green roof performance. The results suggest that, while the retention performance of the studied green roofs under Hong Kong's heavy rainfall regime seems to be less effective, remarkable peak reduction and peak delay were observed even when the green roof system has reached full moisture-storage capacity. Such findings are in line with the proposed Green-roof System Capacity model that green roof serves as an effective buffer that regulates water flow through the system. No statistical significance was found between substrate-depth treatments, despite the higher performance across all three indicators for treatment 80. However, satisfactory peak performance of the 40-mm thin substrate suggests that green roof can be applied even on existing buildings that have limited loading capacity. Pertinent meteorological factors were identified. All in all, extensive green roof remains as an effective and promising alternative mitigation strategy to urban stormwater management in Hong Kong with potential application to other tropical areas. DOI: 10.5353/th_b5194727 Subjects: Green roofs (Gardening)

Download or read book Green Roof Water Quality Impacts and Physicochemical Stability written by Grace Ella Harper and published by . This book was released on 2013 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Green roofs can provide environmental benefits and conserve energy; this research evaluated green roof stormwater management, nutrient loading, and erosion prevention for two green roof media. During a pilot study, the runoff quantity and composition from green roof material was evaluated continuously under field conditions for two different media, both tested under planted and unplanted conditions. Water quantity results show over a 40% reduction in runoff from just the growing media and over 60% reduction in runoff with established plants in green roof media over the eight month study. Previous studies have reported a "first flush" of excess nutrients but without evaluating the duration and intensity of this phenomenon throughout the first year of the roof's life. Total phosphorus at 30 mg/L and nitrogen concentrations above 60 mg/L were observed in green roof runoff initially, with concentrations decreasing over time to 5 and 10 mg/L, respectively. In addition, elevated total organic carbon concentrations were observed, with concentrations of 500 mg/L initially, decreasing to below ten percent of initial concentrations. Media type and age were the largest influences on carbon and nutrient concentrations. Understanding runoff nutrient kinetics can better aid in developing procedures to minimize nutrient runoff and predict nutrient loading more accurately. In testing physical stability, both wind tunnel testing and sampling of total suspended solids in runoff were performed. The green roof drainage and filter fabric systems proved effective at preventing water-based erosion, with median total suspended solids concentrations for both below 20 mg/L. Because wind erosion can occur, surface stabilizers (i.e. adhesives) are available to secure green roof media. Green roof adhesive and plant cover were evaluated through wind tunnel testing; both reduced wind scour down to one-tenth of observed scour without any cover, providing protection against wind erosion"--Abstract, page iv.

Download or read book Living Roofs in Integrated Urban Water Systems written by Daniel Roehr and published by Routledge. This book was released on 2015-03-05 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the infrastructure to manage storm water threats in cities becoming increasingly expensive to build or repair, the design community needs to look at alternative approaches. Living roofs present an opportunity to compliment ground-level storm water control measures, contributing to a holistic, integrated urban water management system. This book offers tools to plan and design living roofs, in the context of effectively mitigating storm water. Quantitative tools for engineering calculations and qualitative discussion of potential influences and interactions of the design team and assembly elements are addressed.

Download or read book A Geographic Approach to Modeling the Impact of Green Roofs on Combined Sewer Overflows in the Bronx written by and published by . This book was released on 2008 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bronx, New York, like many older urban areas in the United States, suffers from the negative environmental impacts from combined sewer overflows (CSOs). Green roofs have been proposed as a best management practice to reduce stormwater runoff and CSOs. These vegetated roof tops can detain rainfall along with providing other benefits to the building owner and community. This paper describes a green roof stormwater model designed for the Bronx, New York. Building-level geographic data was used to estimate the potential area for green roof implementation in each sewer system subcatchment. A software program was designed as a decision support system with a green roof micro-model, a simple sewer system model, and an interactive map. The model results show that if extensive green roofs were implemented on all available flat roof space, then annual CSOs could be reduced by over 30%. This paper discusses the geographic variation of the model results, and the effectiveness of green roofs as a CSO best management practice is used to rank subcatchment performance.

Download or read book Low Impact Development for Urban Ecosystem and Habitat Protection written by Nian She and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Thermal Performance and Storm Water Runoff Retention of a Residential Green Roof System written by Daniel L. Murphy and published by . This book was released on 2012 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Quantity and Quality of Storm Water Runoff Released from Various Green Roof Systems written by Emily Woods and published by . This book was released on 2010 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Green Roof Ecosystems written by Richard K. Sutton and published by Springer. This book was released on 2015-06-04 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date coverage of green (vegetated) roof research, design, and management from an ecosystem perspective. It reviews, explains, and poses questions about monitoring, substrate, living components and the abiotic, biotic and cultural aspects connecting green roofs to the fields of community, landscape and urban ecology. The work contains examples of green roof venues that demonstrate the focus, level of detail, and techniques needed to understand the structure, function, and impact of these novel ecosystems. Representing a seminal compilation of research and technical knowledge about green roof ecology and how functional attributes can be enhanced, it delves to explore the next wave of evolution in green technology and defines potential paths for technological advancement and research.

Download or read book Evaluating Storm Water Runoff of Green Roofs with Varying Growth Medium and Species Composition written by Erin Hilligoss-Volkmann and published by . This book was released on 2011 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonpoint Source News notes written by and published by . This book was released on 2004 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Planting Green Roofs and Living Walls written by Nigel Dunnett and published by Timber Press (OR). This book was released on 2004 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces a revolutionary new concept to gardeners. Planting on roofs and walls began in Europe, but it is now becoming popular all over the world. Green roofs and walls reduce pollution and run-off, and also help insulate and reduce the maintenance needs of buildings. Planting Green Roofs and Living Walls discusses the practical techniques required to make planting on roofs and walls a reality. It describes how roofs may be modified to bear the weight of vegetation, considers the different options for drainage layers and growing media, and lists the plants suitable for different climates and environments. This informative book will encourage gardeners everywhere to consider the enormous benefits to be gained from planting on their roofs and walls.

Download or read book Greening Cities written by Puay Yok Tan and published by Springer. This book was released on 2017-03-29 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an overview of recent scientific and professional literature on urban greening and urban ecology, focusing on diverse disciplines such as landscape architecture, geography, urban ecology, urban climatology, biodiversity conservation, urban governance, architecture and urban hydrology. It includes contributions in which academics, public policy experts and practitioners share their considerable knowledge on the multi-faceted aspects of greening cities. The greening of cities has witnessed a global resurgence over the past two decades and has made a significant contribution to urban liveability and sustainability, as well as increasing resilience. As urban greening efforts continue to expand, it is useful to promote recent advances in our understanding of various aspects of planning, design and management of urban greenery, but at the same time, it is also important to realize that there are important gaps in our knowledge and that further research is needed. The book is organized in three main parts: concepts, functions and forms of urban greening. The first part examines the historical roots of greening cities and how the burgeoning field of urban ecology can contribute useful principles and strategies to guide the planning, design and management of urban greening. The second part shifts the focus to the diverse range of services – the functions – provided by urban greening, such as those related to urban climate, urban biodiversity, human health, and community building. The final part explores conventional, often neglected, but important forms of urban greenery such as urban woodlands and urban farms, as well as relatively recent forms of urban greenery like those integrated with buildings and waterways. It offers a ready reference resource for researchers, practitioners and policy-makers to grasp the critical issues and trigger further studies and applications in the quest for high-performance green cities.

Download or read book Nature Based Strategies for Urban and Building Sustainability written by Gabriel Perez and published by Butterworth-Heinemann. This book was released on 2018-02-14 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nature Based Strategies for Urban and Building Sustainability reviews the current state-of-the-art on the topic. In the introduction, the editors review the fundamental concepts of nature elements in the built environment, along with the strategies that are necessary for their inclusion in buildings and cities. Part One describes strategies for the urban environment, discussing urban ecosystems and ecosystem services, while Part Two covers strategies and technologies, including vertical greening systems, green roofs and green streets. Part Three covers the quantitative benefits, results, and issues and challenges, including energy performances and outdoor comfort, air quality improvement, acoustic performance, water management and biodiversity. - Provides an overview of the different strategies available to integrate nature in the built environment - Presents the current state of technology concerning systems and methodologies on how to incorporate nature in buildings and cities - Features the latest research results on operation and ecosystem services - Covers both established and new designs, including those still in the experimental stage

Download or read book Evaluation of Storm Water Runoff from a Midwest Green Roof System written by Krista Forrester and published by . This book was released on 2007 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Living Roofs in Integrated Urban Water Systems written by Daniel Roehr and published by Routledge. This book was released on 2015-03-05 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the infrastructure to manage storm water threats in cities becoming increasingly expensive to build or repair, the design community needs to look at alternative approaches. Living roofs present an opportunity to compliment ground-level storm water control measures, contributing to a holistic, integrated urban water management system. This book offers tools to plan and design living roofs, in the context of effectively mitigating storm water. Quantitative tools for engineering calculations and qualitative discussion of potential influences and interactions of the design team and assembly elements are addressed.