Cultivation Projects In Rivers And Regulated Lakes

The erosion problems are large in many rivers and regulated lakes. Masses and industrial salts are being spread over the bottom and thereby destroy growth conditions for vegetation, breeding grounds for fish and other species.

• Cofferdams may limit erosion and discharge of industrial salts through brooks and rivers:
  Modern agriculture, climatic changes with heavier precipitation in addition to faster water currents in rivers, brooks and pipes will increase erosion and quantity of industrial salts. When these enter rivers or lakes, pollution will set in and damage living conditions for fish and other sea life. When installing Grip erosion protection across river and brook outlets, such damages will be reduced. This will in return slow the water currents resulting in precipitation of eroded masses. The solution will further simplify the return and use of the eroded masses. At the same the reefs will act as habitats and breeding grounds for fish and other sea life and thereby in the end become a fishing ground.
• Still zones in rivers with unstable water flow may help to save fish and other sea life:
  Still zones in rivers may be constructed by installing Svenner Reef across water courses supplemented with stabilizing of masses in these. The solution may produce magnificent visual water mirrors in addition to fishing grounds in a number of rivers.
• A lot of lakes should be cultivated with artificial habitats in order to increase fish population:
  Regulated lakes are exposed to erosion. The fish population in these lakes may be increased considerably through construction of habitats and sanctuaries. If the vegetation growth on the constructions also can be increased, then the marine biological variation also may be increased and thus provide nourishment for fish and other sea life.
• Artificial habitats in regulated lakes and rivers may limit wear and tear for technical installations in power plants:
  Artificial habitats in regulated lakes and rivers may conditional on correct location of the units prevent large quantities of eroded masses from being sucked into pipelines and power plants. The power plant companies will save considerable maintenance costs if such installations prove successful.
• Artificial habitats in regulated lakes and rivers may reduce the quantity and thereby the costs of setting out fry:
  Large amounts are spent to set out fry in lakes and rivers. A lot of the fry will die as a result of the transition from a sea farm to a lake. In addition such bred fish will have problems in finding food and habitats to survive through a winter. With the use of artificial habitats the marine biological variation will be improved. Breeding possibilities for fish and fry will be improved with more food and sanctuaries.
• Cultivating projects in rivers and lakes may better the conditions for fishing and therewith tourism:
  Installation of artificial reefs may increase both the quantity and the size of fish and other sea life. This will lead to improved fishing opportunities and therewith attract increased tourism.