Surveying Update For Storage Measurement
If you are using storage measurement for floodplain harvesting, you will need:
- survey benchmarks
- storage curve/s
A registered surveyor, or persons recognised by the Minister with skills in these areas, is required to undertake this work. For more
information, please click the link to the department’s
website.
Survey benchmarks to Australian Height Datum (AHD) are permanent marks established near your storage that provide accurate coordinates for
the purposes of referencing in your storage curve* and levelling-in your metering devices, including gauge boards and water level
sensors.
Levelling and positioning metering devices to AHD links the devices to the storage curve, ensuring that storage volume changes can be calculated accurately.
The department has updated the survey benchmark standard and guideline with key staff from Customer Service Spatial Services team to expand the surveying methods and improve the quality, reliability, and security of survey benchmarks. The 2 methods now available are:
- Method 1 - AUSPOS (preferred option)
- Method 2 - CORSnet–NSW post-processed static baselines (existing)
AUSPOS is free and provides fast and easy online post processing services. It is also widely used by surveyors. Landholders have the option to have their surveys uploaded to the State Survey Control Information Management System (SCIMS). Benefits to uploading your survey data to SCIMS includes making adjustments to benchmarks if they have moved, without having to resurvey, saving you money over time.
For more information on surveying methods, please see attached the surveying schedule.
If you require further information or assistance, you can contact the measurement team at:
metering.reform@dpie.nsw.gov.au
Note: Australian Height Datum (AHD) is the height of a point above mean sea level and is the national system used for height reference.
*The department has default LiDAR storage curves in the DQP Portal, taken between 2009 and 2014. If your storage has changed during this time, you will need a new storage curve. This is best done while your surveyor is establishing your survey benchmarks.