Waikato Coastal Database

Coastal Environment, Shoreline Change and Coastal Protection Works at Aotea Township

1. Identification information

Status
Complete
Data Collection Date
1990s - present
Summary
The consent application contains useful reviews of existing information and descriptions of the physical and biological characteristics of the area, but no significant new data collection. Existing data includes a number of shorelines, mapped from historical surveys. The consent for the seawall (hearing April 2003) required monitoring prior, during and following construction to determine compliance of construction with consent requirements and effects of the construction on the adjacent shoreline and beach. The monitoring aims to detect end effects and drops in the level of the beach fronting the seawall. The purpose of this work is to assess coastal hazards, and the environmental impacts of a 750 m seawall fronting Aotea township, near the entrance to Aotea Harbour, West Coast North Island. Severe coastal erosion has threatened and damaged private and public property at Aotea for decades. A number of private properties have been lost to erosion. The Otorohanga District Council has constructed a wooden and rock seawall to protect remaining properties from ongoing erosion, and to replace derelict illegal structures that had been placed by local residents.
Content
The dataset includes information gathered prior to the construction of the wall in order to predict it's effects, and monitoring information gathered during and after construction. Monitoring data includes: Cross-shore profiles at 50 m spacing, collected immediately prior to and following construction, and annually thereafter. Photography looking both directions at same times, at 100 m intervals along the wall and showing the shoreline adjacent to the end of the wall. Alongshore survey along the length of the wall and 150 m past each end, taken immediately prior to and following construction, ane year after construction and 5 yearly thereafter. Annual monitoring report.
Study Types
  • Monitoring
Categories
  • Consents and Structures
  • Coastal Hazards
  • Coastal Development and Public Spaces
  • Shoreline Change
  • Consents and Structures
  • Landscape

2. Contact information

Commissioning Agencies
  • Otorohanga District Council
Contact Organisations
  • Waikato Regional Council

3. Spatial information

Geographic Coverage
Frontage of Aotea Township
Grid Coordinates
Locations
  • Name
    Aotea Township Foreshore
    NZMG Easting
    0
    NZMG Northing
    0
    Location
    Aotea Harbour
    West Coast

4. Data acquisition information

Collection Date
2002 onwards plus review of older information
Methodology
Monitoring survey: Total Station georeferenced (GD49) Frequency of collection: annual

5. Data quality information

Known Limitations
Using total station for surveying alongshore and cross shore locations can be determined with 5 mm horizontal and 10 mm vertical accuracy.

6. Distribution information

Format
Data presented as hard copy graphs and survey diagrams in annual monitoring report.
Applications
Assessing environmental impacts of the seawall.
Availability
Files can be viewed at the Waikato Regional Council - written request by email or letter. Most information publicly available. In rare circumstances some information is confidential.

7. Status information

Data Status
Data collection ongoing.

8. Metadata information

General Notes
Related Links
Publications
Related Publications

9. Related files

No files have been attached to this dataset

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