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Natural Perils Directory
The Natural Peril Directory (NPD) datasets are used within the finance sector, by insurers and reinsurers to refine products and pricing. Success requires accurate information of sufficient detail. UK subsidence claims rise to exceed £500m per annum following dry years - a good reason to manage subsidence risk more effectively.
The Cranfield Soil and AgriFood Institute (CSAI), which incorporates the national Soil Resources institute (NSRI), have designed an easy-to-use and unique dataset, the Natural Perils Directory, to assist the insurance market with risk-management decisions on subsidence, flood and wind, through using their wholly owned, Government-recognised National Soils Data.
Use of the Natural Perils Directory is allowing several of the leading British insurance companies to improve or protect their claims experience on existing buildings insurance portfolios and to target products at lower risk areas where the potential for profit growth is highest.
Why use the Natural Perils Directory
NPD offers a number of attractive benefits and features, enabling:
Modelling Environmental Vulnerability
Greater risk requires greater knowledge
Changing climate and extreme events means damaging floods and subsidence are increasing in frequency and intensity. Insurers need to have accurate and appropriate information to assist in managing their insurance portfolios. This means using environmental datasets which can provide a greater understanding of the potential risks associated with these major challenges.Top
The soils of Britain vary extensively in their texture (the amounts of sand, silt and clay they contain), and their respective property insurance claims rate. Each soil type responds in a specific way to seasonal variations in climate, and it is this response that determines the impact on building foundations. Unlike other currently available models, which concentrate on the underlying geology, Cranfield's Natural Perils Directory incorporates information on the layer that most affects one and two storey building foundations and therefore the domestic building insurance market.
Cranfield's Ground Subsidence Model has evolved from the understanding and evaluation of a number of complex elements including clay-related shrinkage, the compression of unconsolidated, soft subsoils, frost-heave and underground sand abrasion and cavitation. For clay-related subsidence, the soils' potential shrinkage rating is combined with climatic information detailing the intensity of soil drying through the summer to provide the final ground subsidence rating. Almost 1,000 soil types have been individually assessed.Top
Clay Shrinkage Explained
Here is a short, explanatory video of Cranfield soil scientists explaining how clays shrinkage occur.Top
Cranfield's Flood Extent dataset comprises three elements - the riverine, lacustrine and coastal/marine flood provinces. The riverine and lacustrine province is defined by the actual distribution on the ground of alluvial sediment - the tell-tale evidence left behind by past flood waters. The same principle applies at the coast where marine sediments blanketing low-lying areas around the coast that are vulnerable to flooding during storm and tidal surges.Top
Cranfield's Wind Exposure dataset provides a high-level empirical summary of areas subject to prolonged exposure to wind. Whilst not being a storm-track model, the wind exposure dataset has been used to determine areas more subject to wind damage, such as tile-blow.Top
The NPD Offering
What Cranfield and NPD offer
The Natural Perils Directory provides:
Access to Cranfield's:
Obtaining the Natural Perils Directory
The Natural Perils Directory is supplied to the full exit-level Postcode Unit (1.6 million items). Other spatial interpretations, for instance using the Ordnance Survey's Address Point product, may be undertaken by arrangement.
Natural Peril Directory (NPD) is developed by Cranfield University's National Soil Resources Institute and marketed via Cranfield's wholly owned company CIM Limited. For further details concerning the Natural Perils Database, please contact us:
Dr Timothy Farewell
Senior Research Fellow in Geospatial Informatics
Cranfield Soil and AgriFood Institute (CSAFI)
Tel: (01234) 752978
Fax: (01234) 752970
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