C2

Stara Drava Varaždin (C.2): Preparatory Works on the Side Arm Near Completion

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Preparatory works nearing completion; excavation expected to begin in 10–14 days

At the Stara Drava Varaždin site, located in the left-bank inundation area (rkm 289–292), preparatory works are entering their final phase: larger trees have been removed from the future side-arm channel, access roads have been arranged, and thanks to the low water level of the Drava and stable, dry weather, work has been carried out daily.

The start of the main earthworks (sediment excavation) is expected in 10–14 days.

Areal View

What are we doing and why?

  • Opening and stabilising the inflow into the side arm to re-establish water flow.

  • Excavating a new and widening/deepening the existing channel (left bank) along a length of approx. 2.56 km, with an average bed width of ~13 m.

  • Removing part of the river sill (right bank) that obstructs the natural flow, in order to direct water into the side arm during higher water levels.

  • Sediment (estimated ~148,000 m³) will be deposited along the banks/inundation area and shaped to fit the landscape; if needed, it may also be used as material for dike reconstruction, with prior approval from the competent Ministry.

Expected positive impacts

  • Revitalised hydromorphology: refreshed water in the side arm, a more natural flow regime, and stimulated erosional processes.

  • Creation of new habitats: gravel bars, steep and muddy banks that will benefit fish, amphibians, and birds.

  • Ecological benefits: improved conditions in floodplain forests through raised groundwater levels and increased biodiversity.

  • Community benefits: a more orderly river area and contribution to flood-risk reduction through increased retention capacity.

Route of the future meandering channel

The latest drone photos already clearly show the emerging shape of the future side arm and the progress made in preparing the construction site.

The intervention is being carried out by Hrvatske vode (Croatian Waters) in cooperation with the relevant institutions and the local community. The project concept was developed within the DRAVA LIFE project. All works are carried out in compliance with environmental protection requirements and under expert supervision.