Urban flood modelling combining top-view LiDAR data with ground-view SfM observations

Meesuk, Vorawit; Vojinović, Zoran; Mynett, Arthur E.; Abdullah, Ahmad Fikri

doi:10.1016/j.advwatres.2014.11.008

Cited by 119 publications

(84 citation statements)

References 45 publications

(58 reference statements)

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“…For example, the drainage in the Agatare project area was mapped by GPS points in-field and measuring the width of the drain at regular intervals. Using the Digital Terrain Model (DTM) extracted from UAV imagery, the drainage capacity could be calculated more Meesuk et al (2015).…”

Section: Added Value Of Uav Imagery To Provide the Required Spatial Imentioning

confidence: 99%

Opportunities for UAV mapping to support unplanned settlement upgrading

Gevaert¹,

Sliuzas²,

Persello³

et al. 2017

RWJour

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The effort to improve sub-standard living conditions in unplanned settlements is often hindered due to a lack of adequate spatial information describing the baseline situation and changes occurring during and after the upgrading process. Low-cost Unmanned Aerial Vehicles (UAVs) could provide very detailed, up-to-date spatial information for small unplanned areas as and when required. To investigate the utility of such platforms in settlement upgrading, UAV flights were conducted over approximately 150 ha of unplanned settlements in the City of Kigali in May and June 2015. Data obtained with UAV were supplemented by an analysis of the spatial information needs of various stakeholders involved in the upgrading project. In the context of the upgrading project, the results of this study identify four main benefits of using UAV imagery. First, it could replace the 2008 25 cm ortho-imagery by up-to-date 3 cm imagery in current workflows for map updating.Second, it enables the extraction of additional information which was previously unavailable, such as detailed elevation data to support surface water runoff analysis and drainage capacity calculations. Third, it speeds up field work and fourth, the imagery provides a foundation for communication between different stakeholders.When using UAVs it is also important to take many practical considerations into account, as well as the societal and ethical context. Results of the first experiences in Kigali indicate that while the use of UAV is not generally perceived as a problem by the local population, fear of forced displacement and expropriation may raise concerns amongst the residents. Communication between the UAV operator, the local government, local leaders and with the residents before and during flights, and sharing the benefits of the acquired information are important to mitigate these fears. Moreover, the resolution and quality of the images is such I.IntroductionSpatial data is considered essential for unplanned settlement upgrading projects (Kohli et al., 2013, Abbott, 2002Taubenböck and Kraff, 2013). Obtaining an accurate base map of these areas provides a sound basis for Remotely sensed imagery is a key source of spatial information, as it can provide an objective, up-to-date overview of the physical situation in the settlement (Taubenböck and Kraff, 2013). Mason and Fraser (1998) identified seven important roles of satellite imagery for unplanned settlement management: identification of unplanned settlements, identifying changes in the boundaries of these settlements over time, generation of surface data, land use classification, extraction of buildings and other objects for mapping purposes, detailed settlement mapping for spatial modelling purposes, and reconnaissance. However, small buildings and narrow footpaths characteristic of unplanned settlements may hinder the interpretation of commercial satellite imagery with half-meter resolution (e.g. Kuffer et al., 2014).Unmanned Aerial Systems (UAVs) or Remotely Piloted Aircraft Systems (RPAS) also ...

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Section: Added Value Of Uav Imagery To Provide the Required Spatial Imentioning

confidence: 99%

Opportunities for UAV mapping to support unplanned settlement upgrading

Gevaert¹,

Sliuzas²,

Persello³

et al. 2017

RWJour

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“…4008 used effectively to compensate for this shortcoming, [37]. This technique can be easily implemented by incorporating overlapping photos and video scenes.…”

Section: Iscee 2016mentioning

confidence: 99%

Modeling Flood Disasters: Issues Concerning Data for 2D Numerical Models

2017

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Abstract. Flood disasters are one of the worst natural disasters and they occur almost daily. Correspondingly, city managers are nowadays increasingly investing in data collection and modelling activities. Typically, flows in pipes and channels have been modelled using a onedimensional (1D) approach. Also, if the flood flows on the ground are confined to streets and curbs, the use of 1D/1D modelling approach (a.k.a. as dual drainage concept) may be a feasible way forward. However, if the flows are two-dimensional with complex interactions taking place through surface/sub-surface links, then the required approach would be the socalled 1D/2D modelling approach. The ever-increasing power of computers is now allowing a 3D fluid dynamics analysis of overflow and manhole structures, and in time these may be coupled with 1D models that may be used in situations where flow characteristics require with higher dimensionality. With the use of 2D models, the importance of terrain data has become a growing issue. The current paper discusses some of the key modelling approaches and makes particular reference to the terrain data processing and collection which can either improve or deteriorate their predictive capability.

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“…Given the importance of temporal analysis, the use of one-and two-dimensional numerical hydrodynamic models has proved to be invaluable (e.g., [28][29][30]). However, there are numerous issues associated with data, models and mapping of results and so they require careful consideration (see, for example, [31][32][33][34][35][36][37][38][39][40][41][42]). …”

Section: The Notion Of Multifunctionalitymentioning

confidence: 99%

Combining Ecosystem Services with Cost-Benefit Analysis for Selection of Green and Grey Infrastructure for Flood Protection in a Cultural Setting

et al. 2016

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Abstract:The present paper describes a methodological framework that combines ecosystem services (flood protection, education, art/culture, recreation and tourism) with economic analysis for selection of multifunctional measures for flood resilience. The framework includes active stakeholder participation and it consists of the four main components: (1) identification and valuation of ecosystem services pertinent to the project site under various mitigation scenarios, including baseline (pre-mitigation conditions); (2) evaluation of most effective flood mitigation measures through hydrodynamic simulations, and evaluation of economic viability using cost-benefit analysis; (3) selection of measures through consideration of ecosystem services, and solicitation of stakeholders' inputs; (4) development of the conceptual landscape design. Application of the framework was demonstrated in a case study of Ayutthaya Island, Thailand. Results of our research suggest that taking a holistic perspective of ecosystem services and economic assessments, marshalled through active stakeholder participation, has the potential to achieve more ecologically sustainable and socially acceptable solutions for flood protection in areas with cultural heritage. However, there is still a considerable challenge in taking this framework to a full-scale practical implementation, and this mainly relates to the selection of indicators that can enable proper application of ecosystem services.

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Urban flood modelling combining top-view LiDAR data with ground-view SfM observations

Cited by 119 publications

References 45 publications

Opportunities for UAV mapping to support unplanned settlement upgrading

Opportunities for UAV mapping to support unplanned settlement upgrading

Modeling Flood Disasters: Issues Concerning Data for 2D Numerical Models

Combining Ecosystem Services with Cost-Benefit Analysis for Selection of Green and Grey Infrastructure for Flood Protection in a Cultural Setting

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