9.1 Beach profiles
|Open coast, physical processes, erosion, beaches
The core of the database consists of monthly coastal profile analyses for 26 Bay of Plenty coastal sites for 14 -- 16 years. This data is being linked with climate data to explain current beach processes, identify past beach condition and forecast future trends.
A database is being built for the Coromandel. This currently consists of monthly (initially)and then two monthly coastal profile analysis for a selection of Coromandel sites for more than 3 years.
To compare West Coast Beach processes a database is being established. This currently consists of a three-year record of coastal profiles for Ruapuki Beach (West Coast south of Raglan).
|Geographical Coverage||Bay of Plenty, Coramandel, Raglan area, West Coast- North Island|
|Dataset start date.||1985 (BOP); others later|
|Dataset end date.||Ongoing|
|Update frequency.||BOP Monthly. Coromandel 2 monthly|
|Maintenance.||Maintained regularly by Keith Smith|
|Parameters- what is measured||Distance and elevation from a known point which is a benchmark for the site.|
|Parameters- what is calculated||
|Methods used to measure parameters||The Emery (2 pole )method is used. Two poles marked in cm intervals are lined up. The distance between the poles is measured with tape. Elevation is measured on the poles. This method has been calibrated with precision survey methodology.|
|Scale of use.||N/A|
|Number of records||Monthly records for 28 Bay of Plenty sites for 14 years. Three years data for Coromandel and North Island West Coast.|
|GIS compatibility.||BOP sites use the NZ Geodetic Datum.
Coromandel sites have not yet had their locations coordinated but that is a relatively simple task.
North Island West Coast calibration has yet to be done.
|Available formats for users.||Electronic database|
|Access constraints.||Information from the database needs to be purchased.|
|Measurement Accuracy||To be completed by database manager.|
|Completeness of dataset||To be completed by database manager.|
|Positional accuracy||To be completed by database manager.|
|Database steward||Keith Smith/NIWA|
|Database custodian||Keith Smith/NIWA|
|Database custodian contact person||Keith Smith|
|Database custodian Contact
+64 7 856 7026
+64 7 856 1731
|References||Smith, R.K.; Benson,A.K. 2000. Coastline monitoring -- how frequently is
sufficient? Paper presented to NZ Coastal Society Conference. Rotorua, Easter
Anon. 2000. Dedicated to assessing coastal hazards- Aniwaniwa interviews Keith Smith.. Aniwaniwa Issue 13
|Date metadata record prepared.||June 2000|
|Author of metadata record.||Victoria Froude|
|Original purpose.||To answer long-term questions about coastal physical processes, e.g. is a beach responding to seasonal or climatic changes?|
|Relationships with classification systems.||N/A|
|Relationships with other databases||Links with Environment Bay Of Plenty, Environment Waikato and Auckland Regional Council Beach Profile Databases.|
|Known relationships with proposed EPIP indicators.||Not known|
|Database uses?||Regional and district councils
|Public awareness of the database||Low level|
What are the Current and Emerging Uses of the Database for:
|Assisting with determining historic state/baseline.||The database can be used to assist with determining historic beach condition. If linked with climate data it can also provide an important guideline to the size of historic storms.|
|Assisting with determining current state/baseline.||The database provides a good measure of current beach processes and beach profile changes for Bay of Plenty and selected Coramandel beaches. Interpretations of the trends observed for West Coast beaches are proving difficult to determine at this stage.|
|Assisting with modeling possible future outcomes.||The database is sufficiently long-term to allow trends to be modeled, especially when it is combined with climate data. The database can be used to relate sporadic data from sites in Northland and Coromandel to changes in the Bay of Plenty. Because the beaches are on the same coast a model can be used to estimate how the beach with a small amount of data may change over a period of time or as a result of a particular event. At present the Coromandel database is being built to a stage that will allow it to be used to predict changes for other beaches. In the long-term it is intended that the entire database will be used to estimate what is happening along the entire coast from the Bay of Plenty to Northland.|
|Risk assessment.||The database can be used for hazard/risk assessment. If it is combined with climate data it can be used to predict the future magnitude and frequency of storms. The database can also be used to assess risks associated with beach sand mining.|
|Monitoring site selection and sample design.||N/A. It can be used to select sites for comparison purposes.|
|Aggregating and reporting data locally, regionally or nationally.||Data can be aggregated to show trends locally and regionally. It cannot be used to show national trends because it does not include sites representative of the whole country.|