Wave damping, water quality, ecology, shore protection


... are a natural part of the ecological balance of the lake and begin to develop in the spring. Due to high nutrient concentrations in the water, algae growth is getting out of control. In the worst-case scenario, the so-called "algae bloom", can happen during high temperatures which can cause a bathing prohibition. It should never get to that.

... is a direct consequence of high nutrient concentrations that have slowly been introduced into waters over the years. Mostly in "small new" waters, the intensive use of the water (high number of bathers, wakeboarding) accelerates the process. The final state is algae formation.

... usually happens on poorly fortified shores, which are not designed for the wave load of wakeboarders. Breaking shore edges disturbs the shallow water zone as a habitat significantly and has a negative impact on the ecological balance.

The formation of waves in a wakepark is significantly influenced by two components: the wind and the athletes. Water athletes alone create an undamped, chaotic wave pattern, which is shown by a rocking water surface with disturbing wave motion in the lane area. The reed islands dampen this wave motion by utilizing the inertia of the masses. At the entrance of waves, the reed - islands absorb the wave energy. By raising and lowering the islands, the wave energy is absorbed and attenuated. Dampening of the waves is amplified at the water surface by the reed plants. Under the water surface, the pronounced roots take over the wave damping.

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Schwimmen verboten wakeunion




„A system is in ecological balance if the condition does not change without external disturbances". That is exactly what should be achieved. In our case, the system is the lake and the disturbance are the Wakeboarding and / or a large number of bathers. The "smaller and newer" the water the more susceptible it is to disturbances, since the ecological balance is not yet strongly developed. The goal is to strengthen the ecological balance and build it as a strong buffer against the disturbing influences. If the ecosystem is in balance, the self-purification of the water works. 

If the ecological balance is not properly developed, it will lead to an increased concentration of nutrients, which directly results in poor water quality and, in the worst case, can lead to algal blooms. Low visibility depths and unclear water are the first indicators of the deteriorating ecological balance and should not be ignored.


The actual water purification is the breakdown of nutrients such as nitrogen and phosphate and takes place in a networked system of different organisms. These organisms cause the removal and conversion of organic matter into the original basic components. In many waters, however, the foundations for the formation of diverse structures are missing.

The goal is to create a system that supports water-purifying basics. First of all, it is about creating growth area for bacteria as well as animal and plant organisms. In order to strengthen the ecological balance, a wide range of habitats must be created in and around the water, which need to be sufficiently dimensioned to accommodate a wide variety of species.

Only then a complex structure and a strong ecological balance can be established.

Natural, solutions

Uferbefestigung Kokuswalze Rhrricht wakeunion 960

Shore zone with coconut fibre rollers and aquatic plants.

Steinmatratze Uferbefestigung wakeunion 960

Shore protection with stone rollers and pre-cultivated plants on coconut mats.

Reed Islands Wellenbrecher Insel Skizze wakeunion
Habitat and natural water purification by plants.
Gewsserreinigung xylit walze wakeunion
Xylit rollers pre-cultivated with xylit fibers and plants as long-term water treatment.

Shore designs according to your requirements

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Uferbefestigung Projekt April wakeunion 750
Uferbefestigung Projekt Juni wakeunion 750
Plants root through the coconut and xylit rolls and form a new habitat.
Uferbefestigung Projekt August wakeunion 750
Planting has become established. The shore zone is formed and a new wave-dampening habitat developed.

Water purification, shore stabilization

Algae killer: Xylit rollers

The xylit fiber has an incomparably large surface (with organic materials) and a high absorption capacity. As a result, organic substances accumulate very quickly and in a high concentration on the surface of the fibers. Therefor the fiber is superior to other filter materials / growth surfaces, as it is much more "attractive" due to the increased food supply for bacteria.
Ideally, these bacteria now degrade and mineralize the organic matter dissolved in the water. Which are then absorbed by the plants or remain absorbed by the fiber.
These bacteria ideally now form a food base for cilia, which provide food for rotifers and these in turn for small crabs. This plankton also feeds on algae. Particularly important as an effective algae filter are the larger small crab species.
These then cause a reduction in the algae biomass and improve the depth water clarity.
As described above, the xylitol fiber can be the basis for a complex aquatic system that is fundamental to the natural purification of waters. The xylit fiber is 100% organic material and extracted in Germany. It is easy to install; i.e. a great effect is achieved with very little effort.

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Algae filters - Reed Islands

In addition to the wave-dampening effect of the reed islands, these also contribute positively to strengthening the ecological balance of the lake. As a structural element they create habitats above and below water for a number of important organisms, namely where natural growth is not possible, in the middle of the lake or on steep banks without a richly diverse shallow water zone.

more Infos about REED Islands and wave damping

Xylit Walzen Wasser reinigung wakeunion bagger

Xylit rollers

As a water filter on the lake bottom or shore area
Kokuswalze wakeunion

Coconut rollers

As shore protection and carrier material
Roehrichtwalze wakeunion 800

Reed rollers

As shore protection and habitat
steinmatratzen wakeunion

Stone mats

As shore protection and for strong wave exposure
steinwalzen wakeunion 800

Stone rollers

As shore protection for take-off areas at the wakepark
Einzelpflanzen wakeunion 800

Single plants

For your requirement
Kokusmatten wakeunion 800

Coconut mats with reedbed

As carrier material with plants for direct installation

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Uferschutz Steinwalze Netz Steine Befestigung Wakeunion

Stone rollers

As shore protection


The reed islands consist of fully reed-covered, buoyant elements. The carrier material is made of stable and non-rotting, technical building materials and is environmentally neutral as well as frost and UV resistant. The individual elements are stiff enough that reed plants can grow on them under difficult hydraulic conditions and permanently ensure the durability of the construction. The plants of the reed island help with that, because in the first growing season some species of sedges, are additionally linked by the individual elements of a reed island.

The plants of a reed island receive as hydroponics their nutrients directly from the water. In Central Europe, sufficient nutrient supply to reed islands is ensured in almost all waters. If no plant-toxic substances are dissolved, the stock develops and regenerates continuously. Care is not necessary. However, the reed islands should be checked for entry of driftwood or garbage. In order to withstand the particular growth conditions and the hydraulic load, the plant systems used for a floating island must already be well developed during installation and have formed species-specific propagation organs. For use on reed islands particularly suitable species such as White-winged Lily (Iris pseudacorus), Purple Loosestrife (Lythrum salicaria) and offshoot-forming sedges such as Slender Sedge (Carex gracilis) and Black-billed Sedge (Carex acutiformis) are suitable.
In case of increased population pressure by waterfowl, especially with a high stocking of geese or swans, additional measures for the protection of reed islands are advisable.

Reed beds form a complex buoyancy system. Straws and leaves of plants have a pronounced system of air-conducting pathways. As a result, the individual plants or the entire plant population are lighter than water and float on the surface. At the same time, the weight of the developing above-ground leaf mass pushes everything into the water. The greater displacement increases the buoyancy again. The basal zone of the reed, which is crucial for the vitality and renewal of a reed, lies a few centimeters below water. This location is optimal for the development of reed plants as well as for wave dampening. Due to the buoyancy, the weight that is being pushed into the water through the anchoring and by dead biomass, is caught. However, to ensure buoyancy at all times, reed islands are equipped with additional, technical buoyancy bodies.

Ballast weights and anchor ropes anchor reed islands on the bottom of the river. The length of the anchor rope is adapted to occurring water level fluctuations. This simple method of anchoring is applied when the elements can oscillate a few meters back and forth due to wind or current without being driven to the shore. For larger hydraulic loads, it is expedient to mark the starting points of the anchor ropes with buoys.

Reed mats are pre-planted and pre-cultured filter mats. They are offered in the dimensions 0.75 m × 5.00 m and 1.00 m × 5.00 m. The outer fabric sheath allows for robust handling and firm anchoring in the field. The inside fiber is rooting substrate for the plants.
The mats are planted at the beginning of the growing season with plants of the shore and reed zone (20 pieces / m2). After that, they have one growing season to develop. Thanks to runoff or rhizome formation they gradually cover the entire surface of the mat. In autumn, a dense root felt has formed under the mats.
The selection of plant species is based on the natural shore zoning at the installation site. Reed mats are provided with different planting schemes. Their plantings are based on the location requirements i.e. for sunny or partially shaded areas, for flowing or stagnant water, long periods of high tide, the emphasis on attractive flowering species or the use of bite-resistant species.

Stone mats are flat, monolithic securing elements with an outer synthetic fiber reinforcement. The stones (45/125 mm) are filled in vertically and compacted in such a way that the single stone remains stable even at high towing tensions. Often, a filling of 32/64 gravel is used (so-called ballast mats). This version is becoming increasingly popular because of its ecological advantages.
The standard size of stone mats is 2.0 × 2.0 meters with a thickness of 25 cm. Alternatively, thicknesses of 12 cm, 20 cm, 30 cm and 40 cm are offered. In addition to the standard dimension’s other dimensions such as 0.5 m × 2.0 m or 1.0 m × 2.0 m are produced as well.
The plastic reinforcement consists of knotted PE HD. This material is best suited for use on the water. It is UV-stabilized up to an irradiation energy of 320 KLY. In order to be able to be used in hydraulically critical areas, a breaking load of more than 3,000 kg / m² and permissible shear stresses of more than 1,000 N / m² have been demonstrated for reinforcements. Stone mats replace light revetments and are often used in conjunction with reed mats.

Stone rollers consist of a high-strength, UV-stable synthetic fiber reinforcement as an outer sheath. The standard mesh size is 30 × 30 mm. Stones are filled with water blocks 45/125 or with frost-proof gravel 32/64. Since the stone rolls are filled vertically during production, the storage of the stones in the roll is clamped and compacted. Therefore, individual stones remain stable after installation.
Compared to gabions or ballast rollers with wire reinforcement, prefabricated stone rollers have a great flexibility.

Reed rollers are pre-planted and pre-cultivated coconut rollers. They are available in diameters of 20 or 30 cm and lengths of 3 meters. The drained weight of well-developed reed rollers may vary slightly depending on the type of planting.
The following values may be used as reference:
10 kg / m with a diameter of 20 cm
20 kg / m with a diameter of 30 cm
Reed rollers are pre-planted with plants and pre-cultivated over a growing season in the nursery. After about 4 to 6 weeks, the plants are rooted in the reed roller. By autumn, they fully rooted throughout the roller, spread species-typical and compacted the stock on the roller. The visual characteristics of a fully rooted reed roller are rhizomes / stolon’s and the root beard growing out to the side and below the roller.
2 to 3 different reed species are planted per roller. Depending on the planned installation site, attractive flowering plants can be added which do not make a significant contribution to sedimentation.

Xylit rollers have recently increasingly replaced coconut rollers as a component for securing embankment. They have - with comparable costs - a much longer shelf life.
Xylit rolls are made of xylit fibers (carbon wood fibers) which is pressed into a synthetic fiber reinforcement. Xylit is a wood like fiber that is incorporated into the deposits of coal.
It has the structure of the former wood fiber, but is tough and elastic and has a strong resistance to mechanical stress and biodegradation processes. Due to the dense storage of the fiber and the high weight, xylit rollers are stable components. They have a large filtering effect and protect the embarkment from being scoured. Important for engineering applications is the long service life of the fiber; Xylit only completely biodegrades after about 30 years.
Due to the dense storage of the xylit fiber, the rollers are very stable and keep their shape for years. This is important for shore fortifications, where the plants can only slowly take over their protective function only and need reliable protection over a longer growth period. Xylit rollers are alternatives to riprap or rock rollers for such applications. In addition to durability, the fiber has a good settability and has a positive effect on the water quality.

For the production of coconut rolls, the fiber from the mesocarp of the coconut is pressed under high pressure into a tube made of out netting.
The coconut rolls have a standard diameter of 20, 30 or 40 cm and a standard length of 3.0 meters. The weight varies depending on the moisture content of the fiber and is:
5 kg /m with a diameter of 20 cm
9 kg /m with a diameter of 30 cm
17 kg /m b with a diameter of 40 cm

Natural solutions…

… for your waters