Integrated Catchment Management

Gravel extraction

 Research Status: Ongoing
River survey

River survey


Periodic cross section surveys are the main tool used by councils to allocate gravel extraction from rivers bed by considering:

There has been debate about trends in MBL, changes in gravel storage within the Motueka, and the influence of gravel extraction on those trends.

Research Approach

River cross-section data are the main way in which volumes of gravel are calulated. For the Motueka River a comprehensive analysis of all data using a consistent methodology was completed in which mean bed levels and volume of gravel stored in the river channel through time were calculated changes.

The gravel volume changes were compared with gravel extraction rates, and the influence of gravel extraction on trends in riverbed levels determined.

Alternatives to cross section analysis were also considered.

Research Results

More details - Guidelines for assessing gravel extraction volumes »

Gravel beach Low flow in Stanley Brook

Gravel beach

Low flow in Stanley Brook

Recent Publications

Year Title File Size
2012 A Summary of Outcomes and selected formal publications from the Integrated Catchment Management (ICM)research programme:2000 – 2011
pdf       1.08MB
More publications on this topic »
All ICM Publications »

Recent Presentations

Year Title File Size
2007 Sediment dynamics and biological impacts in the Motueka River, New Zealand. pdf       0.56MB
2006 Gravel-related research in the ICM programme. pdf       0.08MB
2006 What are other regional councils doing to improve gravel extraction management. pdf       0.08MB
2006 Advances in understanding bed level trends and gravel volume changes in the Motueka River. pdf       0.37MB
2006 Ecological effects of gravel extraction. pdf       0.13MB
More presentations on this topic »
All ICM presentations »

BMPs, BEPs and Guidelines

Title Description
Using Gravel Extraction to Restore Backwaters Guidelines for creating backwaters...More »  
Gravel Extraction Guidelines – Wellington  
Best practice guidelines for vegetation management and in stream works These best practice guidelines cover activities undertaken by the River and Catchment Services group...More »  
Gravel Extraction to Create Backwaters Draft guidelines to create backwaters, channels, oxbow lakes etc....More »  
Using Gravel Extraction to Restore Floodway Ponds Guidelines for restoring floodway ponds...More »  
Using Gravel Extraction to Restore Oxbow Lakes Guidelines for restoring oxbow lakes for flood protection...More »  
Using Gravel Extraction to Restore River Channels Guidelines for river channel restoration for flood control measures...More »  
All BMPs, BEPs & Guidelines »

Primary Contacts:

Image - Les Basher Les Basher  EmailSend email to BasherL
Phone: 03 545 7708
Fax: 03 546 1082
More details»
Landcare Research
Soil science, geomorphology, erosion processes
No photo available Eric Verstappen  EmailSend email to eric.verstappen
Phone: 03 5438417
Tasman District Council
river & coastal science, engineering & management
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Page last updated Tuesday, 11 August 2009

Related areas

Fine sediment: bringing the geomorphology and biology together Gravel extraction Sediment generation, delivery and impacts