Risk assessment
Scores, and the working behind them
Exposure, sensitivity, adaptive capacity, likelihood — every column a reviewer checksEvery intermediate score, not just the total. A DHSUD reviewer checks the columns, and an assessment that cannot show its working gets sent back.
How exposure is estimated. Population and land-use exposure apply the barangay's susceptible AREA share to its population and its built-up area, because no source publishes where within a barangay people live. That is the standard simplification and the published CDRA makes it too, but it is an assumption rather than a measurement. Critical-facility exposure is the exception: those have coordinates, so it is a real point-in-polygon test.
Very High — ProhibitedHigh — DiscretionaryModerate — ConditionalLow — PermittedNot scored
The highest risk category reached in each barangay, per hazard.
Each barangay is shaded by the highest risk category found in it — not an average. A barangay with one exposure unit at very high risk is a very-high-risk barangay for planning purposes, and averaging that down would hide exactly what a land-use control exists to address.
Flood
| Barangay | Exposure unit | Exposure | Sensitivity | AC | Vuln | Likelihood | Severity | Risk | Category | Land-use control |
|---|---|---|---|---|---|---|---|---|---|---|
| Gana | Population | 41.3% 4 | 19.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Gana | Urban Use Areas | 41.3% 4 | 6.0% 2 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Juan Cartas | Population | 11.5% 3 | 20.0% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Juan Cartas | Urban Use Areas | 11.5% 2 | 8.0% 2 | 3 | 0.50 | 4 | 2.00 | 8.00 | High | Discretionary |
| Las-ud | Population | 86.7% 4 | 21.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Las-ud | Urban Use Areas | 86.7% 4 | 9.8% 2 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Liquicia | Population | 16.3% 3 | 22.0% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Liquicia | Urban Use Areas | 16.3% 2 | 12.0% 3 | 3 | 0.50 | 4 | 2.00 | 8.00 | High | Discretionary |
| Poblacion Norte | Population | 0.1% 1 | 18.0% 4 | 3 | 0.75 | 4 | 2.00 | 8.00 | High | Discretionary |
| Poblacion Norte | Urban Use Areas | 0.1% 1 | 13.9% 3 | 3 | 0.50 | 4 | 1.50 | 6.00 | Moderate | Conditional |
| Poblacion Sur | Population | 28.1% 4 | 19.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Poblacion Sur | Urban Use Areas | 28.1% 3 | 16.2% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| San Carlos | Population | 53.7% 4 | 20.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| San Carlos | Urban Use Areas | 53.7% 4 | 11.0% 3 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| San Cornelio | Population | 19.5% 3 | 21.0% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| San Cornelio | Urban Use Areas | 19.5% 2 | 13.0% 3 | 3 | 0.50 | 4 | 2.00 | 8.00 | High | Discretionary |
| San Fermin | Population | 4.7% 1 | 22.0% 4 | 3 | 0.75 | 4 | 2.00 | 8.00 | High | Discretionary |
| San Fermin | Urban Use Areas | 4.7% 1 | 15.0% 3 | 3 | 0.50 | 4 | 1.50 | 6.00 | Moderate | Conditional |
| San Gregorio | Population | 31.1% 4 | 18.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| San Gregorio | Urban Use Areas | 31.1% 3 | 17.0% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| San Jose | Population | 24.1% 4 | 19.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| San Jose | Urban Use Areas | 24.1% 3 | 8.0% 2 | 3 | 0.50 | 4 | 2.50 | 10.00 | High | Discretionary |
| Santiago Norte | Population | 78.2% 4 | 19.9% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Santiago Norte | Urban Use Areas | 78.2% 4 | 9.9% 2 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Santiago Sur | Population | 90.3% 4 | 21.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Santiago Sur | Urban Use Areas | 90.3% 4 | 12.1% 3 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Sobredillo | Population | 15.2% 3 | 22.0% 4 | 3 | 0.75 | 4 | 3.00 | 12.00 | Very High | Prohibited |
| Sobredillo | Urban Use Areas | 15.2% 2 | 7.0% 2 | 3 | 0.50 | 4 | 2.00 | 8.00 | High | Discretionary |
| Urayong | Population | 9.9% 2 | 18.0% 4 | 3 | 0.75 | 4 | 2.50 | 10.00 | High | Discretionary |
| Urayong | Urban Use Areas | 9.9% 1 | 9.0% 2 | 3 | 0.50 | 4 | 1.50 | 6.00 | Moderate | Conditional |
| Wenceslao | Population | 76.8% 4 | 19.0% 4 | 3 | 0.75 | 4 | 3.50 | 14.00 | Very High | Prohibited |
| Wenceslao | Urban Use Areas | 76.8% 4 | 11.0% 3 | 3 | 0.50 | 4 | 3.00 | 12.00 | Very High | Prohibited |
Liquefaction
| Barangay | Exposure unit | Exposure | Sensitivity | AC | Vuln | Likelihood | Severity | Risk | Category | Land-use control |
|---|---|---|---|---|---|---|---|---|---|---|
| Bautista | Population | 9.1% 2 | 18.0% 4 | 3 | 0.75 | 3 | 2.50 | 7.50 | High | Discretionary |
| Bautista | Urban Use Areas | 9.1% 1 | 4.0% 1 | 3 | 0.25 | 3 | 1.00 | 3.00 | Moderate | Conditional |
| Gana | Population | 74.1% 4 | 19.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Gana | Urban Use Areas | 74.1% 4 | 6.0% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Las-ud | Population | 100.0% 4 | 21.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Las-ud | Urban Use Areas | 100.0% 4 | 9.8% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Liquicia | Population | 8.5% 2 | 22.0% 4 | 3 | 0.75 | 3 | 2.50 | 7.50 | High | Discretionary |
| Liquicia | Urban Use Areas | 8.5% 1 | 12.0% 3 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
| Poblacion Norte | Population | 27.2% 4 | 18.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Poblacion Norte | Urban Use Areas | 27.2% 3 | 13.9% 3 | 3 | 0.50 | 3 | 2.50 | 7.50 | High | Discretionary |
| Poblacion Sur | Population | 63.9% 4 | 19.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Poblacion Sur | Urban Use Areas | 63.9% 4 | 16.2% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Carlos | Population | 96.4% 4 | 20.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Carlos | Urban Use Areas | 96.4% 4 | 11.0% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| San Jose | Population | 14.6% 3 | 19.0% 4 | 3 | 0.75 | 3 | 3.00 | 9.00 | High | Discretionary |
| San Jose | Urban Use Areas | 14.6% 2 | 8.0% 2 | 3 | 0.50 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Santiago Norte | Population | 90.4% 4 | 19.9% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Santiago Norte | Urban Use Areas | 90.4% 4 | 9.9% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Santiago Sur | Population | 99.0% 4 | 21.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Santiago Sur | Urban Use Areas | 99.0% 4 | 12.1% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Sobredillo | Population | 0.0% 1 | 22.0% 4 | 3 | 0.75 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Sobredillo | Urban Use Areas | 0.0% 1 | 7.0% 2 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
| Urayong | Population | 11.2% 3 | 18.0% 4 | 3 | 0.75 | 3 | 3.00 | 9.00 | High | Discretionary |
| Urayong | Urban Use Areas | 11.2% 2 | 9.0% 2 | 3 | 0.50 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Wenceslao | Population | 99.8% 4 | 19.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Wenceslao | Urban Use Areas | 99.8% 4 | 11.0% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
Rain-induced Landslide
| Barangay | Exposure unit | Exposure | Sensitivity | AC | Vuln | Likelihood | Severity | Risk | Category | Land-use control |
|---|---|---|---|---|---|---|---|---|---|---|
| Bautista | Population | 98.4% 4 | 18.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Bautista | Urban Use Areas | 98.4% 4 | 4.0% 1 | 3 | 0.25 | 3 | 2.50 | 7.50 | High | Discretionary |
| Gana | Population | 19.9% 3 | 19.0% 4 | 3 | 0.75 | 3 | 3.00 | 9.00 | High | Discretionary |
| Gana | Urban Use Areas | 19.9% 2 | 6.0% 2 | 3 | 0.50 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Juan Cartas | Population | 87.7% 4 | 20.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Juan Cartas | Urban Use Areas | 87.7% 4 | 8.0% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Las-ud | Population | 0.0% 1 | 21.0% 4 | 3 | 0.75 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Las-ud | Urban Use Areas | 0.0% 1 | 9.8% 2 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
| Liquicia | Population | 76.3% 4 | 22.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Liquicia | Urban Use Areas | 76.3% 4 | 12.0% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Poblacion Norte | Population | 79.1% 4 | 18.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Poblacion Norte | Urban Use Areas | 79.1% 4 | 13.9% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Poblacion Sur | Population | 32.3% 4 | 19.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Poblacion Sur | Urban Use Areas | 32.3% 3 | 16.2% 4 | 3 | 0.75 | 3 | 3.00 | 9.00 | High | Discretionary |
| San Carlos | Population | 2.3% 1 | 20.0% 4 | 3 | 0.75 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| San Carlos | Urban Use Areas | 2.3% 1 | 11.0% 3 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
| San Cornelio | Population | 81.0% 4 | 21.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Cornelio | Urban Use Areas | 81.0% 4 | 13.0% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| San Fermin | Population | 92.2% 4 | 22.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Fermin | Urban Use Areas | 92.2% 4 | 15.0% 3 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| San Gregorio | Population | 64.8% 4 | 18.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Gregorio | Urban Use Areas | 64.8% 4 | 17.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Jose | Population | 75.3% 4 | 19.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| San Jose | Urban Use Areas | 75.3% 4 | 8.0% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Santiago Sur | Population | 0.0% 1 | 21.0% 4 | 3 | 0.75 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Santiago Sur | Urban Use Areas | 0.0% 1 | 12.1% 3 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
| Sobredillo | Population | 81.4% 4 | 22.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Sobredillo | Urban Use Areas | 81.4% 4 | 7.0% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Urayong | Population | 85.6% 4 | 18.0% 4 | 3 | 0.75 | 3 | 3.50 | 10.50 | High | Discretionary |
| Urayong | Urban Use Areas | 85.6% 4 | 9.0% 2 | 3 | 0.50 | 3 | 3.00 | 9.00 | High | Discretionary |
| Wenceslao | Population | 0.0% 1 | 19.0% 4 | 3 | 0.75 | 3 | 2.00 | 6.00 | Moderate | Conditional |
| Wenceslao | Urban Use Areas | 0.0% 1 | 11.0% 3 | 3 | 0.50 | 3 | 1.50 | 4.50 | Moderate | Conditional |
Critical facilities
The one exposure unit that is measured rather than estimated: each facility has coordinates, so this is a point-in-polygon test against the agency's own hazard geometry. A facility is either in the hazard zone or it is not — DHSUD scores that 4 or 1, with nothing in between.
| Facility | Barangay | Hazard | Susceptibility class | Exposure score |
|---|---|---|---|---|
| Public Market | Gana | Flood | MF | 4 |
| Covered Court Evacuation Centre | Gana | Flood | MF | 4 |
| Barangay Health Station | Las-ud | Flood | MF | 4 |
| Water Pumping Station | Liquicia | Flood | HF | 4 |
| Covered Court Evacuation Centre | Gana | Liquefaction | Generally Susceptible | 4 |
| Public Market | Gana | Liquefaction | Generally Susceptible | 4 |
| Barangay Health Station | Las-ud | Liquefaction | Generally Susceptible | 4 |
| Municipal Hall | Bautista | Rain-induced Landslide | VHL | 4 |
| Police Station | Bautista | Rain-induced Landslide | VHL | 4 |
| Municipal Health Centre | Bautista | Rain-induced Landslide | VHL | 4 |
| Central Elementary School | Bautista | Rain-induced Landslide | VHL | 4 |
| Fire Station | Bautista | Rain-induced Landslide | VHL | 4 |
| Public Market | Gana | Rain-induced Landslide | LL | 4 |
| Covered Court Evacuation Centre | Gana | Rain-induced Landslide | LL | 4 |
| District High School | Juan Cartas | Rain-induced Landslide | HL | 4 |
15 of 30 facility-hazard combinations fall inside a mapped zone.
How risk is scored
Severity of consequence
| Vuln 1 | Vuln 2 | Vuln 3 | Vuln 4 | |
|---|---|---|---|---|
| Exposure 4 | 2.50 | 3.00 | 3.50 | 4.00 |
| Exposure 3 | 2.00 | 2.50 | 3.00 | 3.50 |
| Exposure 2 | 1.50 | 2.00 | 2.50 | 3.00 |
| Exposure 1 | 1.00 | 1.50 | 2.00 | 2.50 |
Risk categories and land-use control
| Category | Risk score | Land-use control |
|---|---|---|
| Very High-Risk Areas | 12 – 16 | Prohibited |
| High Risk Areas | 7 – 11.99 | Discretionary |
| Moderate Risk Areas | 3 – 6.99 | Conditional |
| Low Risk Areas | 1 – 2.99 | Permitted |