City of Irvine
2020 Local Hazard Mitigation Plan
Figure 4-5: Deep Seated Landslide Hazards
to store water. 127 Although accurate subsidence mapping data is not available, many important CFs could be gradually affected by subsidence in Irvine and may require further study to examine their function and safety.
Social Threat
Landslides As shown in Table 4-9 , there are 2,200 people and 683 households living within a deep-seated landslide hazard zone, which is only a small percentage of the city’s population. This population has a significantly higher median household income than the City overall. However, households living under the poverty limit, and households with one member aged 65+ are lower than the City overall. These indicators suggest that populations within the landslide hazard zones have high disposable incomes and lower proportions of residents that are retired or living on limited incomes. Subsidence Subsidence is a concern for everyone because it could have a significant effect on large-scale systems such as utility infrastructure, open space, and aquifers. In addition, subsidence could affect the safety of homes. Buildings could gradually sink as a result of subsidence, causing minor issues such as cracks or misalignments of doors and windows, or more costly problems such as sinkholes. These issues could
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