Adapting coastal road designs to take into consideration the impacts of climate change
BEST PRACTICE IN:
Kosrae Island Resources Management Authority
Global Environment Facility (GEF); Secretariat of the Pacific Regional Environment (SPREP); United Nations Development Programme (UNDP)
Global Environment Facility (GEF)
The objective of this project is to enable the state of Kosrae in FSM to build technical capacities to develop designs in coastal road systems that will better withstand against the increasing variability and intensity of rainfall and storm surges. National consultation and review of previous assessments have revealed that the drainage works for the original road design (both built and as yet un-built sections) were based on a maximum hourly rainfall of 178 mm, with an assumed return period of 25 years, whereas by 2050, the hourly rainfall is anticipated to increase to 254 mm as a consequence of climate change.
Government co-financing will assist in the building of a road to the remote village of Walung, while the PACC project will ensure that current and future changes in climate are taken into consideration in the road design, reducing maintenance costs over time.
The project’s objective is to incorporate road modifications that will enable the drainage works to accommodate an hourly rainfall of 254 mm. The state of Kosrae will be making available USD6.9 million from its infrastructure development plan fund for the development of this circumferential road, closing the current 16 km gap. The PACC project will add to this government initiative by developing guidelines on integrating climate risks into road designs and assist in its demonstration.
Because 70% of Micronesia’s population and infrastructure are located in the coastal area, there is a serious concern of their being very vulnerable to climate change and sea level rise. Most of the economic activities, infrastructure and human settlement are located in the coastal areas. These activities have had adverse impacts on the coastal environment, particularly the lagoons, coral reefs, mangrove forests and the shoreline.
The current road infrastructure of Kosrae State is not designed to deal with projected increase in hourly rainfall intensity and storm surges due to climate change. • The current drainage works are not adequate.
• To climate-proof the circumferential road of Kosrae State;
• To develop a national policy framework to raise awareness about the need for adaptation and mitigation actions; and
• To make possible the integration of climate change into sectoral planning.
• To incorporate road modifications that will enable the drainage works to accommodate an hourly rainfall of a maximum of 254 mm;
• To develop guidelines on integrating climate risks into road designs and assist in its demonstration;
• To train key technical staff in relevant government ministries to apply the guidelines in a pilot situation; and
• To demonstrate the use the guidelines through appropriate engineering measures.
A ‘no-regrets’ approach to adaptation is used to provide effective measures to mitigate adverse impacts caused by climate change and sea level rise. The probability components of climate-related risks in Pohnpei and Kosrae are evaluated, both for the present and future conditions reflecting the influence of global warming.
• Guidelines to integrate climate risks (e.g. intense rainfall and storm surges) into coastal road designs; and
• Demonstrating integration of climate change risks in road designs in Walung community, Kosrae.
• Some barriers still remain and need to be overcome in order to improve delivery of the PACC-MICRONESIA. These include competing demands on staff time, inadequate staff resources, equipment, and lack of incentives.
• Lack of capacity (human, systemic, institutional, financial and technical) hampers the sharing of information and knowledge particularly of climate change and adaptation issues, which makes the integration of climate change adaptation into sustainable development prohibitive.
Demonstrating integration of climate change risks in road designs in Walung community, Kosrae Island Collation of baseline data (Hazard zone mapping, GIS mapping, topographic analysis) and interpretation into coastal road designs is ongoing. This is coupled by delineation of watershed survey, cross-section road surveys, beach profiling surveys, socio‐economic surveys that will inform the development of the guidelines. Community consultation is also being carried out as an on‐going process. Preparations for a SEA‐PACC survey to be carried out. Initial clearing of the roads is undertaken by the Public Works Department as part of the demonstration of implementation.
PACC Focal Point Administrator Kosrae Island Resource, Management Authority
PO Box 480, Tofol, Kosrae FM 96944,
Federated States of Micronesia
Tel: +691 370 2076/3646
Fax: +691 370 2867
Implementing Agency Director
Department of Infrastructure and Transportation
P.O. Box 277, Kosrae State
Tel: +691 370 3165
Fax: +691 370 3058
Kosrae Island Resource Management Authority
P.O. Box 480, Tofol,
Kosrae FM 96944, Federated States of Micronesia
Tel: +691 370 2076/3646
Fax: +691 370 2867
South Pacific Regional Environment Programme (SPREP), Global Environment Facility (GEF), Government of FSM. Pacific Adaptation to Climate Change programme (PACC) in Federated States of Micronesia, Kosrae State: In-country consultations report : http://www.sprep.org/att/publication/000661_Kosrae_FSM_NationalPACCRepor...