LDE groundwater engineers testing an irrigation bore on the Heretaunga Plains near Napier, Hawke’s Bay

Groundwater Engineering in Napier

Few aquifers carry as much weight as the Heretaunga Plains system that sits beneath Napier and the wider Hawke’s Bay. It waters the orchards and vineyards the region is known for and supplies the towns as well, which is exactly why the regional council allocates it tightly and keeps a close eye on its quality. Securing a take from a system under that much pressure is the heart of our Napier groundwater work.

We run pumping tests to establish what a bore can yield without harming the aquifer, weigh a proposed take against a resource that is close to fully committed, and assemble the abstraction case and monitoring plan that a consent application stands or falls on. Out on the low-lying flats around Ahuriri, where the water table sits high under reclaimed coastal ground, we also size and run the dewatering that lets basements and services be built. Getting these calls right takes rigorous testing and honest monitoring rather than optimistic assumptions.

That is what gives growers and developers a Hawke’s Bay take they can rely on and defend. Talk to our Napier team about your next project.

How our Napier team delivers groundwater engineering

Groundwater work in Hawke’s Bay revolves around the Heretaunga Plains aquifer. Orchards, vineyards and town supply all draw on it, and because it is heavily allocated, a new or renewed take has to be justified carefully against the resource and the other users. Our Napier engineers pump-test bores, estimate sustainable yield, and build the technical case for a take that stands up under close scrutiny.

On the low-lying coastal flats near Ahuriri we also design dewatering where construction meets the water table. This sits within our wider groundwater engineering capability and our work in the resources sector, where Hawke’s Bay horticulture and viticulture rely on a secure take.

Bore investigation and pumping tests on the Heretaunga Plains aquifer
Water-take and sustainable-yield assessment in a fully allocated system
Construction dewatering for development on coastal flats near Ahuriri
Groundwater monitoring and reporting to support take consents

Groundwater takes and consenting in Hawke’s Bay

Taking groundwater from the Heretaunga aquifer, or dewatering an excavation, above the permitted limits needs a resource consent from Hawke's Bay Regional Council, which manages allocation and the effects of abstraction on a closely watched system. We prepare the assessment and monitoring an application needs, and design to recognised national guidance.

Ministry for the Environment guidance on freshwater allocation and groundwater management
Water New Zealand good-practice guidance for bores and groundwater

LDE groundwater engineering in Hawke’s Bay

LDE delivers groundwater engineering across Hawke’s Bay, from bore testing and water-take assessment on the Heretaunga Plains aquifer to dewatering for development on the coastal flats near Ahuriri. With the aquifer under allocation pressure and closely monitored for quality, much of our work is about securing reliable irrigation and supply takes and keeping them within sustainable limits. You can see more of our regional water delivery on the projects page.

Common questions about groundwater in Hawke’s Bay

Can I still get a water take from the Heretaunga aquifer?

The aquifer is heavily allocated, so a new take needs a strong technical case and may depend on the conditions the regional council sets. We test the bore, assess the take and its effects, and prepare the application so it has the best prospect of success.

Why is the Heretaunga aquifer managed so closely?

It supplies a large share of Hawke’s Bay irrigation and town water and is connected to surface flows, so the regional council manages allocation and quality carefully. That makes rigorous assessment and monitoring essential for any take, which is the core of what we do here.

Who carries out LDE’s groundwater work in Napier?

Our Napier projects are led by Chartered Professional Engineers from our team, backed by the wider LDE water network across New Zealand and Australia.

Does building on the Ahuriri flats need dewatering?

Often it does. The low-lying coastal flats sit close to a shallow water table, so basements, services and deeper earthworks run wet and need pumping to stay workable. We design dewatering to suit the ground and manage the discharge, so coastal development can proceed without flooding the works.