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climate risk

Transport and climate change: Putting Argentina’s resilience to the test

Verónica Raffo's picture


Would you imagine having to evacuate your village by boat because the only road that takes you to your school and brings the goods is flooded?

In February 2018, the fiction became reality for some residents in the province of Salta, northern Argentina, after heavy rains caused the Bermejo and Pilcomayo river to overflow. The flooding resulted in one fatality, required the evacuation of hundreds of residents, and washed a segment of Provincial Route 54, leaving the village of Santa Victoria del Este completely stranded.

Similarly, a segment of National Route 5 in one of the main corridors of Mercosur has been impassable for more than a year due to the excess flows to the Picasa lagoon. The expansion of the lagoon is forcing 4,000 vehicles a day to make a 165-km detour, and adds one transit day for the 1,560 freight trains running every year between Buenos Aires and Mendoza. The flooding is dragging the economy behind and inflating already high logistics costs—a situation that is made worse by conflicts between provinces on how to deal with the water surplus.

As a matter of fact, a recent World Bank study put the cost of damages and disruptions like these at an estimated 0.34% of GDP a year for riverine flooding, plus 0.32% of the GDP for urban flooding.

To address these risks, Argentina’s Ministry of Transport started a dialogue with the World Bank to explore ways of reducing the vulnerability of the network.

Addressing the risks from climate change in performance-based contracts

Chris Bennett's picture


Output and performance based road contracts (OPRC) is a contracting modality that is increasingly being used to help manage roads. Unlike traditional contracts, where the owners define what is to be done, and oftentimes how to do it, OPRC contracts define the outcome that the owners want to achieve, and the contractor is responsible to meet those outcomes. Performance is measured against a series of key performance indicators (KPIs) or service levels.
 
Critical to the success of any OPRC contract is the assignment of risk between parties. Climate change has major implications for OPRC contracts because it affects the risk exposure of both parties. With funding from the Public Private Infrastructure Advisory Facility (PPIAF), a new analysis considered how to incorporate climate change risks into OPRC contracts.
 
What’s Happening Right Now?
 
Without clear expectations around climate risk, neither the asset owner nor the companies bidding for performance contracts will adequately address the risks. Bidders cannot be held accountable for risks that are not specifically cited or linked with performance criteria.
 
At present, climate change risks are generally carried by the asset owner through the Force Majeure provisions of the contract, and treated as ‘unforeseen’ events, with repair costs reimbursed to the contractor. This impacts the overall cost of the OPRC, and where extreme weather events are becoming common-place, reduces the efficacy of OPRC as a contracting modality. The most pressing issues challenging stakeholders during each phase of development are summarized in this chart.

Maximizing finance for safe and resilient roads

Daniel Pulido's picture


Around the world, roads remain the dominant mode of transport and are among the most heavily-used types of infrastructure, accounting for about 80% of the distance travelled for individuals and 50% for goods.

Despite this intensive use, the funding available for road maintenance has been inadequate, leaving roads in many countries unsafe and unfit for purpose.

To make matters worse, roads are also very vulnerable to climate and disaster risk: when El Niño hit Peru in 2017, the related flooding damaged about 18% of the Peruvian road network in just one month.

It is no surprise then that roads are the sector that will require the most financing. In fact, the G20 estimates that roads account for more than half of the $15 trillion investment gap in infrastructure through 2040.

Climate and disaster risk in transport: No data? No problem!

Frederico Pedroso's picture
Development professionals often complain about the absence of good-quality data in disaster-prone areas, which limits their ability to inform projects through quantitative models and detailed analysis.
 
Technological progress, however, is quickly creating new ways for governments and development agencies to overcome data scarcity. In Belize, the World Bank has partnered with the government to develop an innovative approach and inform climate-resilient road investments through the combination of creativity, on-the-ground experience, and strategic data collection.
 
Underdeveloped infrastructure, particularly in the transport sector, is a key constraint to disaster risk mitigation and economic growth in Belize. The road network is particularly vulnerable due to the lack of redundancy and exposure to natural hazards (mostly flooding). In the absence of alternative routes, any weather-related road closure can cut access and severely disrupt economic and social movement.
 
In 2012, the government made climate resilience one of their key policy priorities, and enlisted the World Bank’s help in developing a program to reduce climate vulnerability, with a specific focus on the road network. The institution answered the call and assembled a team of experts that brought a wide range of expertise, along with experience from other climate resilience interventions throughout the Caribbean. The program was supported by Africa, Caribbean and Pacific (ACP) European Union funds, managed by the Global Facility for Disaster Reduction and Recovery (GFDRR).
 
Our strategy to address data scarcity in Belize involves three successive, closely related steps.

The “plastic bridge”: a low-cost, high-impact solution to address climate risk

Oliver Whalley's picture
Also available in: Français
Photo: Anthony Doudt/Flickr
Bridges are critical links in the transport network. In their position across waterways, they are exposed to the full effects of flooding and landslides, and are often the first pieces of infrastructure to be damaged in the event of a disaster. They also typically take weeks or months to repair.  Besides causing expensive damage to the infrastructure itself, disruptions in connectivity also have a much broader impact on economic productivity and people’s ability to access essential services. As many places are expected to witness more intense and frequent rainfall as a result of climate change, the risk to bridges will only worsen: more rainfall will lead to bigger river flows and more damage to bridges, especially those designed to handle smaller storms.

At each end of a bridges is a structure which supports the weight of the deck. These are known as abutments, and they are often the first part of the bridge to fail. Blockage of the main channel by debris can cause water to look for the path of least resistance around the sides of the bridges, thus placing the abutments at risk.

Traditional bridge construction requires the installation of piles for the foundations of abutments—a lengthy and expensive process that involves specialist materials, skills and equipment.

But there is another promising solution: Geosynthetic Reinforced Soil (GRS) abutments. These allow for rapid and resilient construction of bridge abutments using locally available materials, without specialized equipment. With GRS, bridges can be constructed in as little as five days (Von Handorf, 2013) and at a cost 30-50% lower than traditional approaches (Tonkin and Taylor, 2016) .

GRS abutments are based on ‘geogrids,’ a high density mesh made out of polyethylene (plastic). Layers of soil and geogrid are combined to create a solid foundation for the bridge deck. Construction can be completed with basic earthmoving and compaction equipment, and a range of local fill materials can be used with guidance from geotechnical specialists.