The purpose of the Decision Support System (DSS) is to support The World Bank and the Nepal Department of Roads in prioritising investments in strategic road infrastructure across Nepal. The DSS integrates hydrological, seismic, climate and socio-economic data and information to identify sites of highest vulnerability to climate and seismic threats.
The geographical scope of the project is the eight road corridors which are targeted by the Road Sector Development Project (RSDP) and Nepal-India Regional Trade and Transport Project (NIRTTP).

Summary of road corridors assessed in project

No Road Name Total length (km) Number of bridges
1 Chinchu-Jajarkot Road 108 17
2 Khodpe-Chainpur Road 101 6
3 Satbanj-Darchula Road 110 14
4 Satbanj-Tripurasundari Road 7 0
5 Sitalpati-Musikot Road 82 10
6 Surkhet-Jumla Road 207 21
7 Tallodungeshwor-Dailekh Road 25 3
8 Narayanghat-Mugling Road 36 15


Risk Zoning Map

The Risk Zoning Map is the output of multiple integrated risk assessments to determine vulnerability of road corridors for a number of physical hazards and socio-economic factors. The assessment combines historical data, expert knowledge, and modelling of future conditions to evaluate the risk of specific sections of road to various hazards, including landslides, flooding and seismic disturbance, as well as future vulnerability related to climate change.

Risk Mitigation Options

The Risk Mitigation Options tab presents actions taken by government, businesses, and communities in response to the impacts of natural hazards and climate change. It can include actions taken to prevent, avoid or reduce the risks of those impacts (ie proactive risk mitigation), or in response to impacts as they happen (reactive risk mitigation). It can take the form of retrofitting and upgrading existing infrastructure as well as an anticipatory response by building risk mitigation measures into sector and area wide plans and into new infrastructure.

Metadata records

Details of data used in the development of the DSS are included as in interactive Metadata table and are also downloadable as ISO19115 standard metadata records.

Download risk profile in PDF:

Download risk profile

Customise your map view and download as PDF:

Download current mapview

Summary of Risk Value:

Select a road chainage polygon in map to display details

Risk Assessment Score:
Selected composite Risk Index along the length of the road:

Applied Mitigation Options

Download IS019115 metadata XML records of all datasets
Risk zone map profiles generated by project:
Download shapefile

Summary of data sets used in DSS


About the project

Through the Geohazard Risk Management and Resilient Road Asset Management in Nepal project, the World Bank is committed to supporting the Government of Nepal (GoN) in identifying, assessing and prioritizing risk mitigation measures to enhance the resilience of the country’s road network to seismic hazards and climate change impacts and to carrying out holistic planning and decision-making under conditions of uncertainty. The project is supporting the Department of Roads (DoR) in risk-informed infrastructure development in conjunction with two ongoing World Bank projects: the Road Sector Development Project (RSDP) and Nepal-India Regional Trade and Transport Project (NIRTTP).

The resilient infrastructure project is implemented through three interconnected components:

Component I: “Hazard Mapping and Risk Assessment” was implemented by Aviyaan Consulting Private Limited. It focused on the collection and consolidation of geohazard risk information, made available through an online platform;

Component II: ‘Improving the Resilience of Nepal’s Strategic Roads Network’, is implemented by the Joint Venture of International Centre for Environmental Management (ICEM) Asia and GEOCE Consultants Private Limited; and

Component III: “Geohazard Risk Management Investment Plan”, is being implemented by EPTISA, which is carrying out in-depth design and implementation of resilient road measures for the identified roads under the RSDP and NIRTTP;

Project objectives and scope

The main objective of component II, “Improving the Resilience of Nepal’s Strategic Road Network,” is to assess and advise on future climate change and natural hazard risks to road investments in Nepal. This is achieved by performing a climate and disaster risk assessment to the selected roads under RSDP and NIRTTP, and the dissemination of findings to DoR and other relevant agencies responsible for road infrastructure. The specific objectives are to:
(i) Conduct climate and disaster risk assessment for transport infrastructure assets for floods, landslides and seismic hazards;
(ii) Conduct an assessment of current and future network costs associated with the disruption of use of the priority national road network by the hazard identified;
(iii) Develop a dynamic, interactive, user-friendly Decision Support System (DSS) for mitigation planning;
(iv) Identify, prioritize and plan mitigation options to increase the resilience of roads and bridges;
(v) Build the capacity of GoN technical staff on climate change risk assessment and mitigation planning and decision-making;
(vi) Promote replication and sustainability through dissemination of project data, analysis and results.

Overall project methodology

Risk assessment of the road network Prioritization of assets in each corridor Risk mitigation or adaptation planning Knowledge Management

Step 1: Risk assessment of the road network: documenting and analyzing past experiences and identifying future vulnerability;

Step 2: Prioritization of assets in each corridor: based on road corridor zoning, multi-criteria analysis and hotspot identification;

Step 3: Risk mitigation or adaptation planning: defining risk mitigation options and priorities for the road corridors;

Step 4: Knowledge management: development of manual and guidance notes.

Hazard risk indices and parameters

Risk Indices Parameters
1. Risk from rainfall-induced landslides 1.1 Rainfall threshold for landslides, baseline rainfall
1.2 Rainfall threshold for landslides, factoring in climate change
1.3 Geology or rock type
1.4 Slope near the road right of way
1.5 Historical landslide occurrence
2. Risk from seismic-induced landslides 2.1 Geology or rock type
2.2 Bedrock orientation
2.3 Thrust and fault lines
2.4 Earthquake energy transfer
2.5 Slope near the road right of way
3. Flood risk 3.1 Flood depth and extent, with climate change
3.2 High water level at bridge crossings, with climate change
4. Risk from drainage 4.1 Area of the catchment
4.2 Average slope of catchment
4.3 Projected impact of climate change to the catchment

Project knowledge products

Guidance Notes:
1- Risk Assessment and Hotspot Identification
2- Risk Mitigation Planning
3- Criticality Assessment
4- DSS Guidance Note

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