Nature-Based Solutions for Rainwater Management in the Urban Environment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Urban Water Management".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 7429

Special Issue Editors


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Guest Editor
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genova, 1 Montallegro, 16145 Genova GE, Italy
Interests: hydrology; precipitation; measurement; green roofs; nature-based solutions; sustainable urban drainage
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E-Mail Website
Guest Editor
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genova, 1 Montallegro, 16145 Genova, GE, Italy
Interests: hydrology; accuracy of atmospheric precipitation measurements; fluid dynamics and environmental engineering; pluvial flooding; sustainable urban drainage
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nature-based solutions (NBS) used in sustainable urban drainage systems (SUDS) exploit natural techniques to control runoff formation. They are based on the restoration of fundamental hydrological processes (interception, evapotranspiration, and infiltration) that are compromised or strongly limited in the urban areas, with resulting critical conditions in urban drainage networks, pluvial floodings, and the pollution of the receiving water bodies. NBSs are also useful to increase rainwater harvesting and to control thermal energy fluxes in indoor and outdoor urban areas.

Research is still needed to define and quantify suitable performance indicators to assess the effect of the NBS on the resilience of modern cities, especially in areas where the rainfall climatology is most challenging, being characterized by short-duration high-intensity events separated by long dry periods.

We welcome research contributions employing experimental and numerical/analytical methods, the former based for instance on the verification of the hydraulic and hydrological performance of different NBSs on dedicated laboratory testbeds and/or field installations, the latter based on rainfall–runoff models and on numerical simulations of the hydraulic behavior of urban drainage solutions.

Prof. Dr. Luca Giovanni Lanza
Dr. Arianna Cauteruccio
Guest Editors

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Keywords

  • urban hydrology
  • nature-based solutions
  • sustainable urban drainage
  • resilient cities
  • stormwater management
  • low impact development
  • green roofs
  • rainwater harvesting

Published Papers (3 papers)

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Research

21 pages, 5098 KiB  
Article
Potential of Decentral Nature-Based Solutions for Mitigation of Pluvial Floods in Urban Areas—A Simulation Study Based on 1D/2D Coupled Modeling
by Jonas Neumann, Christian Scheid and Ulrich Dittmer
Water 2024, 16(6), 811; https://doi.org/10.3390/w16060811 - 8 Mar 2024
Viewed by 853
Abstract
Urban drainage systems are generally designed to handle rainfall events only up to a certain intensity or volume. With climate change, extreme events that exceed the design storms and consequently result in flooding are occurring more frequently. Nature-based solutions (NBSs) have the potential [...] Read more.
Urban drainage systems are generally designed to handle rainfall events only up to a certain intensity or volume. With climate change, extreme events that exceed the design storms and consequently result in flooding are occurring more frequently. Nature-based solutions (NBSs) have the potential to reduce the pressure on urban drainage systems and to increase their resilience. This study presents an approach to compare and evaluate the effectiveness of NBSs for flood mitigation using a coupled 1D/2D model of surface and sewer flow. The study analyzes the effect of infiltration systems (dimensioned to return periods of T = 5 and 100 years), various green roofs, and tree pits considering the different degrees of implementation. The NBSs are represented as LID elements according to SWMM. As expected, the mitigation effect of NBSs declines with increasing rainfall intensities. However, infiltration systems dimensioned to T = 100 years achieve almost three times the flood reduction compared to systems dimensioned to T = 5 years, even during extremely heavy rainfall events (100 mm), resulting in a reduced total flood volume of 15.1% to 25.8%. Overall, green roofs (excluding extensive green roofs) provide the most significant flood reduction (33.5%), while tree locations have the least effect. Full article
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20 pages, 1029 KiB  
Article
Stormwater Green Infrastructure Resilience Assessment: A Social-Ecological Framework for Urban Stormwater Management
by Leila Mosleh, Masoud Negahban-Azar and Mitchell Pavao-Zuckerman
Water 2023, 15(9), 1786; https://doi.org/10.3390/w15091786 - 6 May 2023
Cited by 4 | Viewed by 3237
Abstract
Urban areas are increasingly vulnerable to the effects of climate change. Stormwater Green infrastructure (SWGI) is seen as an approach to increase the climate resilience of urban areas, because they can buffer precipitation changes brought on by climate change. However, SWGI features themselves [...] Read more.
Urban areas are increasingly vulnerable to the effects of climate change. Stormwater Green infrastructure (SWGI) is seen as an approach to increase the climate resilience of urban areas, because they can buffer precipitation changes brought on by climate change. However, SWGI features themselves need to be resilient to climate change to be able to contribute to the resilience of cities. Thus, we aimed to develop a SWGI resilience assessment framework that could be used to identify challenges and to inform decisionmakers’ efforts to enhance resilience. We developed a resilience assessment framework based upon a resilience matrix approach to recognize effective resilience categories for SWGI by reviewing the literature on critical functionality and barriers to implementation and operation. These categories for SWGI included policy, design, maintenance, economic factors and social factors that influence SWGI functionality. We then identified specific aspects under each category that could be used for assessing SWGI resilience, recognizing that SWGI has critical functionalities and factors controlling its viability. Unlike other SWGI assessment frameworks that are focused on ecosystem services as a final outcome, we worked from a socio-ecological perspective in order to include socio-economic and policy factors and design and planning aspects that affect service provision. Developing a resilience assessment framework is critical for management because it can reveal the specific challenges facing SWGI resilience that have traditionally been overlooked, such as maintenance and social factors. This specific framework can also lead to efficient planning and management by identifying interrelations and hierarchical relationships of categories that influence resilience. Application of this framework will rely upon expert input to connect broad dimensions with specific indicators for SWGI to local priorities in resilience planning. Full article
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16 pages, 2261 KiB  
Article
Rainwater Harvesting for Urban Landscape Irrigation Using a Soil Water Depletion Algorithm Conditional on Daily Precipitation
by Arianna Cauteruccio and Luca G. Lanza
Water 2022, 14(21), 3468; https://doi.org/10.3390/w14213468 - 30 Oct 2022
Cited by 3 | Viewed by 1995
Abstract
The supply of various non-potable water usages based on the harvesting and management of rainwater in urban areas allows to save high-quality water resources for strictly potable use and to limit the squandering of precious freshwater resources. A rainwater harvesting system included in [...] Read more.
The supply of various non-potable water usages based on the harvesting and management of rainwater in urban areas allows to save high-quality water resources for strictly potable use and to limit the squandering of precious freshwater resources. A rainwater harvesting system included in a reconversion project of a former military area located in the town of Genova (Italy) is examined. Rainwater is collected and used for the landscape irrigation of public areas. Three rainwater collection scenarios are considered while varying the size of the storage tank, using daily rainfall data from a local long-term record as the reference rainfall climatology. A behavioural model is adopted to simulate the operation of the rainwater harvesting system and improved with a dedicated algorithm to account for the actual soil water availability for the vegetation and its temporal decay, based on the specific soil type and vegetation. For each scenario/tank size combination, reliability indices are calculated and compared, while the detention time and the annual usage volume per unit tank capacity are used as indicators of water quality deterioration in the tank and the economic benefit associated with the exploitation of the resource. The best solution in terms of rainwater collection scenario and tank size is identified. Full article
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