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Layer: LiquefactionVulnerability_andLateralSpreadingDamageCategories_2022 (ID:75)

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Name: LiquefactionVulnerability_andLateralSpreadingDamageCategories_2022

Display Field: Category

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Liquefaction vulnerability and lateral spreading ground damage zones for Glenorchy, as prepared by Tonkin + Taylor (T+T) under contract to Otago Regional Council (ORC). This corresponds to Appendix A of the report titled "Glenorchy Liquefaction Vulnerability Assessment" prepared by T+T for ORC, dated 26th May 2022 (T+T Ref: 1017916).This dataset comprises a categorization of liquefaction vulnerability and related lateral spreading ground damage, following the methodology given in the MBIE/MfE guidelines (2017). The vulnerability assessment uses 100-year, 500-year return period events as determined using Module 1 of the Guidelines for earthquake geotechnical engineering practice in New Zealand (NZGS & MBIE 2021), as well as an Alpine Fault Rupture Scenario (with a return period of approximately 30-years).There are five vulnerability levels used in this dataset:1. Low Liquefaction Vulnerability: There is a probability of more than 85 percent that liquefaction-induced ground damage will be None to Minor for 500-year shaking.2. Medium Liquefaction Vulnerability: There is a probability of more than 50 percent that liquefaction-induced ground damage will be: Minor to Moderate (or less) for 500-year shaking; and None to Minor for 100-year shaking. 3. High Liquefaction Vulnerability: There is a probability of more than 50 percent that liquefaction-induced ground damage will be: Moderate to Severe for 500-year shaking; and/or Minor to Moderate (or more) for 100-year shaking. There is no considered to be a significant risk of lateral spreading ground damage.4. High Liquefaction Vulnerability and Major Lateral Spreading Ground Damage: As for category (3), but with a significant risk of major lateral spreading ground damage (>100mm) in a 500-year shaking event.5. High Liquefaction Vulnerability and Severe Lateral Spreading Ground Damage: As for category (3), but with a significant risk of severe lateral spreading ground damage (>500mm) in a 500-year shaking event.References:MBIE & MfE. (2017). Planning and Engineering Guidance for Potentially Liquefaction-prone Land. Wellington: New Zealand Ministry of Business, Innovation and Employment, Building System Performance Branch.NZGS & MBIE. (2021). Earthquake geotechnical engineering practice, Module 1: Overview of the Guidelines. Wellington: New Zealand Geotechnical Society and Ministry of Business, Innovation and Employment.

Copyright Text: Otago Regional Council 2022 Tonkin and Taylor 2022

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Supported query Formats: JSON, geoJSON, PBF

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Last Edit Date: 12/2/2024 2:13:58 AM

Schema Last Edit Date: 12/2/2024 2:13:58 AM

Data Last Edit Date: 12/2/2024 2:13:58 AM

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