Publication: Five Feet High and Rising : Cities and Flooding in the 21st Century
Loading...
Date
2011-05-01
ISSN
Published
2011-05-01
Author(s)
Lamond, Jessica
Bloch, Robin
Bhattacharya, Namrata
Lopez, Ana
Papachristodoulou, Nikolaos
Bird, Alan
Proverbs, David
Davies, John
Barker, Robert
Editor(s)
Abstract
Urban flooding is an increasingly important issue. Disaster statistics appear to show flood events are becoming more frequent, with medium-scale events increasing fastest. The impact of flooding is driven by a combination of natural and human-induced factors. As recent flood events in Pakistan, Brazil, Sri Lanka and Australia show, floods can occur in widespread locations and can sometimes overwhelm even the best prepared countries and cities. There are known and tested measures for urban flood risk management, typically classified as structural or engineered measures, and non-structural, management techniques. A combination of measures to form an integrated management approach is most likely to be successful in reducing flood risk. In the short term and for developing countries in particular, the factors affecting exposure and vulnerability are increasing at the fastest rate as urbanization puts more people and more assets at risk. In the longer term, however, climate scenarios are likely to be one of the most important drivers of future changes in flood risk. Due to the large uncertainties in projections of climate change, adaptation to the changing risk needs to be flexible to a wide range of future scenarios and to be able to cope with potentially large changes in sea level, rainfall intensity and snowmelt. Climate uncertainty and budgetary, institutional and practical constraints are likely to lead to a combining of structural and non-structural measures for urban flood risk management, and arguably, to a move away from what is sometimes an over-reliance on hard-engineered defenses and toward more adaptable and incremental non-structural solutions.
Link to Data Set
Citation
“Lamond, Jessica; Jha, Abhas; Bloch, Robin; Bhattacharya, Namrata; Lopez, Ana; Papachristodoulou, Nikolaos; Bird, Alan; Proverbs, David; Davies, John; Barker, Robert. 2011. Five Feet High and Rising : Cities and Flooding in the 21st Century. Policy Research working paper ; no. WPS 5648. © World Bank. http://hdl.handle.net/10986/3412 License: CC BY 3.0 IGO.”
Associated URLs
Associated content
Other publications in this report series
Publication The Asymmetric Bank Distress Amplifier of Recessions(Washington, DC: World Bank, 2025-07-11)One defining feature of financial crises, evident in U.S. and international data, is asymmetric bank distress—concentrated losses on a subset of banks. This paper proposes a model in which shocks to borrowers’ productivity dispersion lead to asymmetric bank losses. The framework exhibits a “bank distress amplifier,” exacerbating economic downturns by causing costly bank failures and raising uncertainty about the solvency of banks, thereby pushing banks to deleverage. Quantitative analysis shows that the bank distress amplifier doubles investment decline and increases the spread by 2.5 times during the Great Recession compared to a standard financial accelerator model. The mechanism helps explain how a seemingly small shock can sometimes trigger a large crisis.Publication From Tailwinds to Headwinds(Washington, DC: World Bank, 2025-07-10)The first quarter of the twenty-first century has been transformative for emerging market and developing economies (EMDEs). These economies now account for about 45 percent of global GDP, up from about 25 percent in 2000, a trend driven by robust collective growth in the three largest EMDEs—China, India, and Brazil (the EM3). Collectively, EMDEs have contributed about 60 percent of annual global growth since 2000, on average, double the share during the 1990s. Their ascendance was powered by swift global trade and financial integration, especially during the first decade of the century. Interdependence among these economies has also increased markedly. Today, nearly half of goods exports from EMDEs go to other EMDEs, compared to one-quarter in 2000. As cross-border linkages have strengthened, business cycles among EMDEs and between EMDEs and advanced economies have become more synchronized, and a distinct EMDE business cycle has emerged. Cross-border business cycle spillovers from the EM3 to other EMDEs are sizable, at about half of the magnitude of spillovers from the largest advanced economies (the United States, the euro area, and Japan). Yet EMDEs confront a host of headwinds at the turn of the second quarter of the century. Progress implementing structural reforms in many of these economies has stalled. Globally, protectionist measures and geopolitical fragmentation have risen sharply. High debt burdens, demographic shifts, and the rising costs of climate change weigh on economic prospects. A successful policy approach to accelerate growth and development should focus on boosting investment and productivity, navigating a difficult external environment, and enhancing macroeconomic stability.Publication Intergenerational Income Mobility around the World(Washington, DC: World Bank, 2025-07-09)This paper introduces a new global database with estimates of intergenerational income mobility for 87 countries, covering 84 percent of the world’s population. This marks a notable expansion of the cross-country evidence base on income mobility, particularly among low- and middle-income countries. The estimates indicate that the negative association between income mobility and inequality (known as the Great Gatsby Curve) continues to hold across this wider range of countries. The database also reveals a positive association between income mobility and national income per capita, suggesting that countries achieve higher levels of intergenerational mobility as they grow richer.Publication The Macroeconomic Implications of Climate Change Impacts and Adaptation Options(Washington, DC: World Bank, 2025-05-29)Estimating the macroeconomic implications of climate change impacts and adaptation options is a topic of intense research. This paper presents a framework in the World Bank's macrostructural model to assess climate-related damages. This approach has been used in many Country Climate and Development Reports, a World Bank diagnostic that identifies priorities to ensure continued development in spite of climate change and climate policy objectives. The methodology captures a set of impact channels through which climate change affects the economy by (1) connecting a set of biophysical models to the macroeconomic model and (2) exploring a set of development and climate scenarios. The paper summarizes the results for five countries, highlighting the sources and magnitudes of their vulnerability --- with estimated gross domestic product losses in 2050 exceeding 10 percent of gross domestic product in some countries and scenarios, although only a small set of impact channels is included. The paper also presents estimates of the macroeconomic gains from sector-level adaptation interventions, considering their upfront costs and avoided climate impacts and finding significant net gross domestic product gains from adaptation opportunities identified in the Country Climate and Development Reports. Finally, the paper discusses the limits of current modeling approaches, and their complementarity with empirical approaches based on historical data series. The integrated modeling approach proposed in this paper can inform policymakers as they make proactive decisions on climate change adaptation and resilience.Publication Global Poverty Revisited Using 2021 PPPs and New Data on Consumption(Washington, DC: World Bank, 2025-06-05)Recent improvements in survey methodologies have increased measured consumption in many low- and lower-middle-income countries that now collect a more comprehensive measure of household consumption. Faced with such methodological changes, countries have frequently revised upward their national poverty lines to make them appropriate for the new measures of consumption. This in turn affects the World Bank’s global poverty lines when they are periodically revised. The international poverty line, which is based on the typical poverty line in low-income countries, increases by around 40 percent to $3.00 when the more recent national poverty lines as well as the 2021 purchasing power parities are incorporated. The net impact of the changes in international prices, the poverty line, and new survey data (including new data for India) is an increase in global extreme poverty by some 125 million people in 2022, and a significant shift of poverty away from South Asia and toward Sub-Saharan Africa. The changes at higher poverty lines, which are more relevant to middle-income countries, are mixed.
Journal
Journal Volume
Journal Issue
Collections
Related items
Showing items related by metadata.
Publication Climate Trends and Impacts in China(World Bank, Washington, DC, 2013-09)This discussion paper summarizes observed and projected trends in extreme weather events, present-day climate variability, and future climate change and their impacts on China's different regions. Findings are presented from China's national assessment report on climate change (2007) and second national assessment report on climate change (2011) as well as other studies by Chinese and international experts. In addition to reviewing the physical climate science, the paper also looks at trends in economic damages in China from weather related hazards. The paper serves as background for a series of discussion papers on climate risk management and adaptation in China. The growing body of scientific evidence shows that China's climate is indeed changing, especially when climate is viewed at the regional level. Temperatures are rising, precipitation regimes are changing, and shifts have occurred in the distribution of extreme weather events. The effects of extreme weather events, present-day climate variability, and future climate change cut across many different sectors of China's economy. China's government estimates that direct economic losses from extreme weather events cost the country 1 to 3 percent of gross domestic product each year. As China's economy continues to grow, its exposure to weather-related hazards is expected to heighten, especially without policies to limit building in hazardous areas such as floodplains and alleviate non-climate pressures such as overuse of freshwater resources. Effective risk management policies and investments are crucial to reducing the sensitivity and increasing the resilience of the country to extreme weather, climate variability, and long-term climate change.Publication Achieving urban climate adaptation in Europe and Central Asia(2009-10-01)Many cities across Europe and Central Asia are experiencing the impacts of climate change, but most have not integrated climate adaptation into their agendas. This paper examines the threats faced and measures that can be taken by cities in the region to protect buildings, heritage sites, municipal functions, and vulnerable urban populations. In general, local governments must be proactive in ensuring that existing buildings are climate ready, paying particular attention to emerging technologies for retrofitting the prefabricated, panel style buildings that dominate the landscape while assessing the viability of homes situated in flood plains, coastal areas, and steep slopes. They also must ensure that new developments and buildings are designed in ways that account for climatic fluctuations. Although the resilience of all populations needs to be considered, historical patterns of discrimination require that special provisions are made for the poor and for ethnic minorities such as the Roma because these groups will be most at risk, but are least likely to have access to adequate resources. Urban climate adaptation requires national-level support and local commitment. However, centralized planning and expert-led decision-making under the former regimes may affect the ability of cities to pursue programmatic approaches to adaptation. Therefore, while national governments need to make adaptation a policy priority and ensure that municipalities have adequate resources, local government agencies and departments must be transparent in their actions and introduce participatory and community-based measures that demonstrate respect for diverse stakeholders and perspectives.Publication India - Vulnerability of Kolkata metropolitan area to increased precipitation in a changing climate(World Bank, 2011-06-01)This study aims to strengthen the understanding of the vulnerability of Kolkata from increased precipitation caused by climate change effects with a specific goal to: compile a data base with past weather related information and damage caused by extreme weather related episodes; develop hydrological, hydraulic, and storm drainage models to identify vulnerable areas and determine physical damage estimates resulting from climate change effects; assess monetary, social, and environmental impacts resulting from such climate change events; and strengthen local capabilities so that the planning process for Kolkata can account for climate related damage effects in future while analyzing all new projects. In this study, precipitation events in Kolkata based on available historical rainfall data for 25 years has been considered as a baseline (without climate change) scenario. The study modeled the impact of climate change on increased flooding in Kolkata Metropolitan Area (KMA). The main causes of flooding in KMA are intense precipitation, overtopping of the Hooghly River due to water inflow from local precipitation as well as that from the catchment area, and storm surge effects. Land subsidence was not included in the study as it was felt to be a localized problem in only a few pockets.Publication Climate Resilient Ningbo Project : Local Resilience Action Plan, Volume 1. Final Report(Washington, DC, 2011-06)Ningbo serves as the Chinese pilot city for the World Bank Climate Resilient Cities (CRC) Program. The CRC program aims to, prepare local governments in the East Asia region to better understand the concepts and consequences of climate change; how climate change consequences contribute to urban vulnerabilities; and what is being done by city governments in East Asia and around the world to actively engage in learning capacity building, and capital investment programs for building sustainable, resilient communities. This local resilience action plan (LRAP) had four parts. Part one investigated natural hazards weather observations and climate models. Seven key climatic parameters were selected: temperature, rainfall, drought, heat wave, flood, tropical cyclone, and sea level rise. Part two examined how the city functions, and pursues socio-economic development through a city vulnerability assessment. The qualitative, city vulnerability assessment was based on five sectors- people, infrastructure, environment, economy, and government. Each sector was analyzed extensively on a range of issues, and compared to other similar Chinese cities to more accurately judge its performances. Part three is the gap analysis. It was performed to understand the government actions and their effectiveness to respond to natural disasters, and whether the current and planned policies and programs address the current and future climate change impacts and natural disasters. This part was supported by the following inventories: inventory of natural disasters, and inventory of policies and programs. Part four therefore was to develop recommendations for each of the city vulnerability sectors. The 70 plus recommendations are specific to Ningbo's vulnerabilities and risks. They are described briefly, intended to serve as an introduction. Feasibility studies are recommended before further action or implementation.Publication The Case of Climate Change Adaptation in Campeche, Mexico : Uncertain Future, Robust Decisions(Washington, DC, 2013-01)This documented case of climate change adaptation in Campeche Mexico grapples with a problem that is fundamental to addressing climate change risks in areas of high vulnerability, which is how to reach consensus and take decisions under an uncertain future. The state of Campeche in Mexico, is used as an example. With its long coastline, Campeche is highly vulnerable to current and projected future climate threats. Two different approaches to decision making under uncertainty have been explored. (i) A Strategic Environmental Assessment (SEA) approach was used to systematically analyze expected impacts, identify and agree on a menu of adaptation measures, and prioritize those measures, using a powerful combination of solid scientific knowledge and local expertise. (ii) The real options theory approach was applied to selected adaptation alternatives, and the benefits of waiting were compared with the costs of delaying decisions. In general, options that were modular and flexible were found to lead to more robust and prudent adaptation measures. The specific results obtained in this work are less important than the overall tenor and spirit of the messages from these exercises. Most importantly both exercises SEA and real options demonstrated that involved actors are ultimately consistent and cautious in their approach to climate risks. An important lesson to emerge from this work is that there is merit in adopting multiple approaches to tackle problems where uncertainty looms large. When the answers converge there is likely to be greater confidence in the outcomes. A second and perhaps more important lesson is the need to identify all costs including the options foregone by embarking on an irreversible course of action.
Users also downloaded
Showing related downloaded files
Publication Government Matters III : Governance Indicators for 1996-2002(World Bank, Washington, DC, 2003-08)The authors present estimates of six dimensions of governance covering 199 countries and territories for four time periods: 1996, 1998, 2000, and 2002. These indicators are based on several hundred individual variables measuring perceptions of governance, drawn from 25 separate data sources constructed by 18 different organizations. The authors assign these individual measures of governance to categories capturing key dimensions of governance and use an unobserved components model to construct six aggregate governance indicators in each of the four periods. They present the point estimates of the dimensions of governance as well as the margins of errors for each country for the four periods. The governance indicators reported here are an update and expansion of previous research work on indicators initiated in 1998 (Kaufmann, Kraay, and Zoido-Lobat 1999a,b and 2002). The authors also address various methodological issues, including the interpretation and use of the data given the estimated margins of errors.Publication Governance Matters IV : Governance Indicators for 1996-2004(World Bank, Washington, DC, 2005-06)The authors present the latest update of their aggregate governance indicators, together with new analysis of several issues related to the use of these measures. The governance indicators measure the following six dimensions of governance: (1) voice and accountability; (2) political instability and violence; (3) government effectiveness; (4) regulatory quality; (5) rule of law, and (6) control of corruption. They cover 209 countries and territories for 1996, 1998, 2000, 2002, and 2004. They are based on several hundred individual variables measuring perceptions of governance, drawn from 37 separate data sources constructed by 31 organizations. The authors present estimates of the six dimensions of governance for each period, as well as margins of error capturing the range of likely values for each country. These margins of error are not unique to perceptions-based measures of governance, but are an important feature of all efforts to measure governance, including objective indicators. In fact, the authors give examples of how individual objective measures provide an incomplete picture of even the quite particular dimensions of governance that they are intended to measure. The authors also analyze in detail changes over time in their estimates of governance; provide a framework for assessing the statistical significance of changes in governance; and suggest a simple rule of thumb for identifying statistically significant changes in country governance over time. The ability to identify significant changes in governance over time is much higher for aggregate indicators than for any individual indicator. While the authors find that the quality of governance in a number of countries has changed significantly (in both directions), they also provide evidence suggesting that there are no trends, for better or worse, in global averages of governance. Finally, they interpret the strong observed correlation between income and governance, and argue against recent efforts to apply a discount to governance performance in low-income countries.Publication Breaking the Conflict Trap : Civil War and Development Policy(Washington, DC: World Bank and Oxford University Press, 2003)Most wars are now civil wars. Even though international wars attract enormous global attention, they have become infrequent and brief. Civil wars usually attract less attention, but they have become increasingly common and typically go on for years. This report argues that civil war is now an important issue for development. War retards development, but conversely, development retards war. This double causation gives rise to virtuous and vicious circles. Where development succeeds, countries become progressively safer from violent conflict, making subsequent development easier. Where development fails, countries are at high risk of becoming caught in a conflict trap in which war wrecks the economy and increases the risk of further war. The global incidence of civil war is high because the international community has done little to avert it. Inertia is rooted in two beliefs: that we can safely 'let them fight it out among themselves' and that 'nothing can be done' because civil war is driven by ancestral ethnic and religious hatreds. The purpose of this report is to challenge these beliefs.Publication Governance Matters VIII : Aggregate and Individual Governance Indicators 1996–2008(2009-06-01)This paper reports on the 2009 update of the Worldwide Governance Indicators (WGI) research project, covering 212 countries and territories and measuring six dimensions of governance between 1996 and 2008: Voice and Accountability, Political Stability and Absence of Violence/Terrorism, Government Effectiveness, Regulatory Quality, Rule of Law, and Control of Corruption. These aggregate indicators are based on hundreds of specific and disaggregated individual variables measuring various dimensions of governance, taken from 35 data sources provided by 33 different organizations. The data reflect the views on governance of public sector, private sector and NGO experts, as well as thousands of citizen and firm survey respondents worldwide. The authors also explicitly report the margins of error accompanying each country estimate. These reflect the inherent difficulties in measuring governance using any kind of data. They find that even after taking margins of error into account, the WGI permit meaningful cross-country comparisons as well as monitoring progress over time. The aggregate indicators, together with the disaggregated underlying indicators, are available at www.govindicators.org.Publication Design Thinking for Social Innovation(2010-07)Designers have traditionally focused on enchancing the look and functionality of products.