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Annex H: Risk to property estimation The risk to property estimation seeks to determine the annualized risk to agriculture, fisheries and forestry (AFF) and urban assets of the municipality and province. While AFF assets are represented as a polygon feature, urban assets are made up of built-up areas, critical point facilities and lifeline infrastructure and are represented as polygon, point and line feature types respectively. Prioritization will depend on the ratio of the total assets and the estimated risk. Two estimates will be derived namely, risk to AFF and urban assets. Risk estimation for Built-up and AFF areas This covers the risk estimation for builtup and AFF areas using a polygon based feature type map. The estimates for built-up areas will be combined to the estimates derived from the critical point facilities and lifeline utilities to determine the total urban risk. Prepare a Property Inventory Exposure Map Gather map data pertaining to land cover, built-up area, agriculture/crop production zones, and forest zones. These can be gathered from national agencies such as NAMRIA, DENR-FMB, and the Department of Agriculture. These can also be sourced from regional and provincial sources. The property inventory map will serve as the exposure map to deter mine the elements at risk in terms of risk to property. 1. A good source good source of map data identifying the extent of built-up areas are NAMRIA land cover maps.
These maps, however, may not n e c e s s a r i l y re f l e c t t h e l a t e s t information pertaining to the extent of the built-up zones. In such cases local additional field surveys can be conducted to supplement out-dated data. 2. Similarly, agricultural production lands can also be derived from land cover maps. The classification of agricultural lands are limited to cultivated perennial, cultivated annual crop lands and fish ponds areas. Areas indicated as crop production areas do not indicate the type of crop planted. In such cases, additional input maps can be used to delineate agricultural areas by type of crop which is important in assessing provincial/municipal level risk. 3. Forest production and protection areas can be derived from the Department of Environment and Natural Resources-Forest Management Bureau (DENR-FMB). Forest production areas cover Community Based Forest Management (CBFM) areas, those