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Integrated management of urban aquatic habitats to enhance quality of life and environment in cities: Selected case studies
Published in Iwona Wagner, Jiri Marsalek, Pascal Breil, Aquatic Habitats in Sustainable Urban Water Management, 2014
The conservation function of UBRs has to be extended to degraded or potentially degraded areas in and out of core zones. Stream restoration efforts will have significant impact on the protection of biodiversity and water quality in the watershed area. MGI has a key role in the implementation of the UBR concept in the province. UNESCO’s MAB Programme, local universities (ITU and IU), DHKD and other nature protection NGOs, Conservation Councils (CC) of Istanbul, Ministry of Environment and Forestry (MoEF)-Nature Protection Directory and also citizens’ organizations should all take part in the process of developing and implementing UBRs for Istanbul.
A scoping review on Water Sensitive Urban Design aims and achievements
Published in Urban Water Journal, 2022
Samira Rashetnia, Ashok K Sharma, Anthony R Ladson, Dale Browne, Ehsan Yaghoubi
Some WSUD systems have been assessed for their role in stream restoration. Stream restoration can deliver significant economic benefits (Gerner et al. 2018; CRC for Water Sensitive Cities). Bioretention systems are assessed to understand if they can restore groundwater flows and infiltration, and even if they can mimic natural flow regime features (Endreny and Collins 2009; Davis et al. 2012). It has been noted that these systems can be designed to mimic interflow patterns from natural streams (DeBusk, Hunt, and Line 2012). However, there is still a question about the system feasibility of delivering a natural flow regime without substantially decreasing the flow volume excess due to impervious areas (Walsh et al. 2012). A combination of stormwater harvesting systems and infiltration systems is suggested for the management of flow regime at small scales, but still, further research is required to investigate as how to achieve flow regime management at both catchment and land parcel scales (Burns et al. 2014). Further effort is also needed on water quality and ecological response projects and for knowledge improvement to address geomorphic change through flow regime management.
Drones in urban stormwater management: a review and future perspectives
Published in Urban Water Journal, 2019
Beyond water quality, drones have significant potential to transform the way that stream flowrate is measured in an urban environment. Several studies have applied drone video and particle image velocimetry algorithms to estimate stream velocities (e.g. Tauro, Petroselli, and Arcangeletti 2016; Thumser et al. 2017). While these applications to date have been limited by a need for artificial tracers and ground control points, the methods are transferrable to streams in the urban environment. This technology could complement an existing stormwater monitoring program by allowing stormwater managers to indirectly measure streamflow quickly and efficiently during flood events at critical locations that lack a permanent or semi-permanent monitoring station. This would provide stormwater managers with critical data needed to make decisions regarding infrastructure investments, stream restoration, and emergency flood plain management. In addition to measuring flow rates during a flood, drones have been shown to be valuable in rapid, local risk assessment though post-flood analysis that quantifies the spatial extent of flooding and water ponding conditions in an urban city using aerial imagery (Zhu et al. 2017). Because floods happen quickly and restrict movement on land, the ability to rapidly collect remote sensing data for flood monitoring and risk assessment would be of significant value.
Redistribution of flow velocity in sharp bends using unsubmerged vanes
Published in International Journal of River Basin Management, 2019
Seyed Mohammad Ghaneeizad, Ehsan Bahrami Jovein, Jalil Abrishami, Joseph F. Atkinson
The motivation for the present study was to explore the application of continuous single unsubmerged vanes in a sharp bend in open channels. This study investigates the behaviour of different single vane configurations in a 90-degree bend using both experimental and numerical approaches. The objective of this study is to examine the effects of different vane configurations on flow behaviour, specifically variations of flow velocity, turbulent kinetic energy (TKE), secondary flow, and bed and wall shear stress, compared to the no-vane case. In addition to allowing direct measurements, the experiments were performed to validate numerical results, and the numerical model was used to examine a wider range of configurations than were considered in the experiments, and also to allow more detailed evaluations of flow characteristics. This study provides insights into potential applications of unsubmerged vanes for stream restoration.