Mohanasundar Radhakrishnan

Mohanasundar Radhakrishnan
IHE Delft Institute for Water Education | UNESCO-IHE · Department of Water Science and Engineering

PhD

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39
Publications
20,046
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380
Citations

Publications

Publications (39)
Article
Full-text available
Risk-informed flood risk management requires a comprehensive and quantitative risk assessment, which often demands multiple (thousands of) river and flood model simulations. Performing such a large number of model simulations is a challenge, especially for large, complex river systems (e.g., Mekong) due to the associated computational and resource...
Article
Full-text available
Water rationing contributes to inequalities in the water supply. Household storage tanks complicate the performance and the hydraulic modelling of these systems. Rationing is often not based on insights into system performance and fails to achieve equity and the operators struggle to explain the rationing tactics to the stakeholders. Understanding...
Article
Full-text available
Flood risk reduction strategies play an important role in flood risk management (FRM) and these strategies are being co-designed with the engagement of the stakeholder through multiple consultations and co-designing sessions. Effective participation of stakeholders in interactive work sessions requires fast and accurate modeling systems with a user...
Article
Full-text available
In China, the notion of a water sensitive city has gained popularity in urban water management as a result of the detrimental effects of flooding and pollution caused by developmental activities. Urban systems and their interrelationships are critical for long-term urban water management and water sensitivity. This article is a case study consideri...
Article
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Deterioration of water quality due to economic development, climate change and other factors has become a challenge to human beings and the ecosystem. Most countries have recognized this problem and have resorted to actions for improving water quality. However, the effect on water quality improvements due to these actions is uncertain due to the pl...
Preprint
Full-text available
Flood risk management and planning decisions in many parts of the world have historically utilised flood hazard or risk maps for a very limited number of hazard scenarios (e.g. river water levels), mainly due to computational challenges. With the potentially massive increase in flood risk in future due to the combination of climate change effects (...
Article
Full-text available
Has COVID-19 compounded the risk to the people affected by floods? Flooding (fluvial, pluvial, tidal and storm surge) affects the lives, livelihoods and socioeconomic activities of millions of people every year and displaces them from their homesteads, communities and socio-cultural setting. During extreme events, people are forced to move to shelt...
Article
This paper presents a novel interdisciplinary and catchment-based approach for exploring urban flood resilience. Our research identified and developed a diverse set of adaptation measures for Elwood, a suburb in Melbourne, Australia, that is vulnerable to pluvial and coastal flooding. We drew on methods from social science, urban design and environ...
Article
Sustainable urban development at the global level results from sustainable actions undertaken at city, neighbourhood and household levels with the right balance of environmental, economic and social aspects, achieved through initiatives such as water sensitive cities, sponge cities and “active, beautiful and clean waters ” (ABC waters). Green infra...
Article
Resilience towards climate and socio-economic changes can be increased by means of flexible adaptation. In contemporary adaptation planning, building resilience is considered together with objectives such as sustainability, productivity and transformations. An adaptation planning process (termed water-sensitive city adaptation planning process (WSC...
Article
Upgrading urban services and maintaining their functionality, such as drainage systems, in a sustainable manner to keep up with the increasing demand and changing needs, like climate adaptation and socio-economic conditions, is a planning, implementation and management challenge. Retrofitting urban infrastructure is a socio-technical process like p...
Article
Full-text available
Traditional infrastructure asset management is about maintaining the status quo of service levels in a resource-restricted, sometimes risk-increasing environment. Infrastructure asset management (IAM) is effective in addressing resource-deprived situations and in maximizing the benefits of the utility in these contexts. This makes IAM a very approp...
Article
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The lack of resilience of urban systems to weather and climate variability—termed type I adaptation—and also to climate change—type II adaptation—are both major challenges to the livability and sustainability of cities in the Global South. However, there is often competition and conflict in these cities between actions that address existing adaptat...
Article
Full-text available
The planning and phasing of adaptation responses are essential to tackle uncertainties and ensure positive outcomes while adapting to changing circumstances. Understanding the evolution of coping and adaptation responses and their capacities is a prerequisite for preparing an effective flood management plan for the future. The aim of this paper is...
Article
Full-text available
Adaptation gaps are shortcomings of a system responding to climate change, whereas adaptation deficits are shortcomings in providing services. These two drivers for adaptation are often in conflict in many secondary cities in the global south (SCGS). It is possible to align these seemingly conflicting drivers into a productive unity, a conceptual a...
Article
In the context of climate adaptation planning there are relationships between adaptation drivers and adaptation measures, which makes the selection and implementation of the adaptation measures a challenging task. This challenge may be addressed by: structuring the adaptation problem using a multiple perspective adaptation framework; and applying a...
Article
A framework for assessing economic flood damage for a large number of climate and urban development scenarios with limited computational effort is presented. Response surfaces are applied to characterize flood damage based on physical variables describing climate-driven hazards and changing vulnerability resulting from urban growth. The framework i...
Article
Full-text available
Climate change and urbanization have led to an increase in the frequency of extreme water related events such as flooding, which has negative impacts on the environment, economy and human health. With respect to the latter, our understanding of the interrelationship between flooding, urban surface water and human health is still very limited. More...
Article
Cities have started adapting to uncertain climate drivers such as temperature and sea level rise, and some cities are also transitioning towards concepts such as Water Sensitivity. In adaptation planning, flexibility is considered as an important characteristic to respond to changing circumstances. This paper develops a novel approach to identify w...
Article
Full-text available
Urban areas, especially in developing countries, are adapting to deficits in infrastructure and basic services (Type I adaptation) and to adaptation gaps in response to current and future climatic, societal and economic change (Type II adaptation). The responses to these adaptations needs can be integrated and implemented using an "agile urban adap...
Article
Full-text available
Although Sustainable Drainage Systems (SuDS) are used in cities across the world as effective flood adaptation responses, their economic viability has frequently been questioned. Inclusion of the monetary value of ecosystem services (ES) provided by SuDS can increase the rate of return on investments made. Hence, this paper aims at reviewing the en...
Article
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Storm water management in Singapore has always been a challenge due to intense rainfall in a flat, low-lying and urbanised catchment. PUB’s (Singapore’s National Water Agency) recent runoff control regulation limits the runoff coefficient to 0.55 for developments larger than or equal to 0.2 ha. The use of Active, Beautiful, Clean (ABC) Waters desig...
Article
Full-text available
Active, Beautiful, Clean Waters (ABC Waters) design features—natural systems consisting of plants and soil that detain and treat rainwater runoff—comprise a major part of Sustainable urban Drainage Systems (SuDS) in Singapore. Although it is generally accepted that ABC Waters design features are able to detain runoff and reduce peak flow, their eff...
Article
Full-text available
Water pollution associated with flooding is one of the major problems in cities in the global South. However, studies of water quality dynamics during flood events are not often reported in literature, probably due to difficult conditions for sampling during flood events. Water quality parameters in open water (canals, rivers, and lakes), flood wat...
Preprint
Water pollution associated with flooding is one of the major problems in cities in the global South. However, studies of water quality dynamics during flood events are not often reported in literature, probably due to difficult conditions for sampling during flood events. Water quality parameters in open water (canals, rivers, and lakes), floodwate...
Article
Full-text available
Adaptation to climate change is being addressed in many domains. This means that there are multiple perspectives on adaptation; often with differing visions resulting in disconnected responses and outcomes. Combining singular perspectives into coherent, combined perspectives that include multiple needs and visions can help to deepen the understandi...
Preprint
Full-text available
Adaptation to climate change is being addressed in many domains. This means that there are multiple perspectives on adaptation; often with differing visions resulting in disconnected responses and outcomes. Combining singular perspectives into coherent, combined perspectives that include multiple needs and visions can help to deepen the understandi...
Technical Report
Full-text available
Resilience has a variety of definitions, although these all share a commonality in referring to the ability of a system to recover from disturbance. Definitions vary regarding what ‘system(s)’ and as to what recovery means. Traditional considerations of ‘water sensitivity’ in the context of urban areas have often focused on the need to prevent wate...
Technical Report
Full-text available
Climate change induced extreme weather events call for a reconsideration of how built-up areas are designed and are already forcing incremental adaptation of existing cities, neighbourhoods and properties. Yet, the magnitude of climate change and the associated consequences for the urban water cycle are highly uncertain. Even when minimised by furt...
Conference Paper
Full-text available
Inherent uncertainties are the main matter of constrain and concern for any fool proof urban flood management programme. Selection of better retrofitting options to tackle uncertainties involves the process of evaluating the technical and financial feasibility of wide range of options. In this paper, we present a case study of a catchment in Ho Chi...
Conference Paper
Full-text available
Although various interpretations exist, resiliency often includes the ability of a system to bounce back or recover from the impacts of an adverse event. With the aim of operationalising the recovery capacity of urban areas for severe flooding, an approach is adopted that takes into account the relationship between flood damages and the gross domes...
Conference Paper
Full-text available
Urban retention basin has been introduced as one of the promising measures to address increased storm water flow in urbanized areas. This man-made water space may not just help existing storm water drainage systems regulating extreme events but also improve urban landscape and micro-climate conditions. Can Tho city, a largest city in Mekong delta i...
Conference Paper
Full-text available
Inherent uncertainties are the primary constraints and concerns for any robust urban flood management programme. Selection of better retrofitting options to tackle uncertainties involves the process of evaluating the technical and financial feasibility of a wide range of options. In this paper, we present a case study of a catchment in Ho Chi Minh...
Conference Paper
Future uncertainties are a matter of concern for urban flood management. This calls for an integrated urban flood risk management approach that is adaptive to changing circumstances in the future. Emerging approaches in urban flood risk management such as Water Sensitive Urban Design, living with water, and room for water try to address the flood i...
Article
Full-text available
A growing body of evidence suggests that it is unwise to make the a-priori assumption that university students are ready and eager to embrace modern online technologies employed to enhance the educational experience. We present our opinion on employing Wiki, a popular Web 2.0 technology, in small student groups, based on a case-study of using it cu...
Article
Concerns have been raised regarding disinfection by-products (DBPs) formed as a result of the reaction of halogen-based disinfectants with DBP precursors. In order to appreciate the chemical and biological tradeoffs, it is imperative to understand the formation trends of DBPs and their spread in the distribution network. However, the water at a poi...
Article
Full-text available
A growing body of evidence suggests that it is unwise to make the a-priori assumption that university students are ready and eager to embrace modern online technologies employed to enhance the educational experience. We present an opinion on employing Wiki, a popular Web 2.0 technology, in small student groups, based on a case-study of using it cus...

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