rubénbeltrán · arquitectura · urbanismo · consultoría

Linear river park with flood-protection embankment

l’Horta Sud · Spain · 2026

Technical data

Type of work
Flood defence integrated into a floodable river park
Scale
Riverside edge of the town, about 1 km long
Protection criterion
500-year flood plus freeboard (starting criterion)
Studio’s role
Setting out and justifying the measure; preliminary studies and park concept
Year
2026
Status
Preliminary studies and concept

Description

In the October 2024 flood, what held the water back along the edge of the town was a strip of slightly raised farmland, not a built defence. The cross-sections the studio measured along that edge show a freeboard of between a few centimetres and one metre above the water level, and at one point the bank was overtopped. The riverside edge has no properly sized embankment and is today largely abandoned farmland.

The studio proposes to turn that defence into public space: a flood-protection embankment built into a linear river park of around one kilometre that runs along the edge of the town. The defence stops being a wall and becomes a raised promenade, a viewpoint or a set of terraced steps. The park takes the strip expected to flood as part of its brief, with light surfacing, resilient materials and no obstacles to the flow, and with riparian planting arranged in bands according to its tolerance to water, working as a technical device rather than ornamental gardening.

The section comes before the plan: the levels associated with the different floods are fixed first, and the route is drawn afterwards. The starting criterion is protection against the 500-year flood with freeboard; the final level will depend on the hydraulic study and on prior consultation with the river basin authority. The embankment and the park are kept separate from the channel repairs because they do not restore a previous condition: they improve protection.

The special plan proposal, drafted by the studio, zones this edge as a public park designed to flood and provides for a green corridor along the watercourse. The studio set out and justified the measure in the reconstruction strategy, and is now working on the preliminary studies and the concept for the park, building on a site visit that recorded how the edge is used today —walking, running, cycling— and what it lacks: shade, benches and a continuous route.

Gallery

Interpretive diagram prepared by the studio, not to scale: the embankment levels depend on the hydraulic study.

Nine projects in l’Horta Sud.

Described by type, scale and stage.

  1. Reconstruction and resilience agendal’Horta Sud · 29 actions · Completed · 2025–2026
  2. Catchment study and DANA diagnosisl’Horta Sud · 5 sub-catchments · 2.7 km of channel · ~38,300 m³ eroded and ~47,700 m³ deposited · Diagnosis completed · 2026
  3. River channel clearance and reshapingl’Horta Sud · 2.7 km of channel · ~78,000 m³ removed · 1,750 m of bank with rock armour · Studies and outline design completed, permits in progress · 2026
  4. Channel renaturalisation and bioengineeringl’Horta Sud · ~570 m of rock armour ready for planting · 500 m of earth bank · 6 separable parts · Outline design in progress · environmental application submitted · 2026–2028
  5. Linear river park with flood-protection embankmentl’Horta Sud · ~1 km of riverside edge · Preliminary studies and concept · 2026
  6. Post-DANA reconstruction special planl’Horta Sud · ~51 ha of river-affected zone · 2.2 ha of floodable parks · Proposal submitted · 2025–2026
  7. Planning amendments for resiliencel’Horta Sud · 5 regulatory changes · 60 % of rainfall absorbed by SuDS · Detailed amendment approved · 2026
  8. Elevated crossing over a ravinel’Horta Sud · Deck of ~50 × 10 m · two lanes and a cycle and pedestrian path · Design in progress · 2026
  9. Urban regeneration and sustainable drainagel’Horta Sud · 6 projects · ~250 m² of draining tree pits and planters · ~500 m² of permeable playground · Detailed designs and costed reports · 2025–2026