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Aquatic landscaping PowerPoint PPT Presentation

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Aquatic landscaping. Creating artificial ponds, cascades and waterfalls. Adds serenity or motion. Aquatic landscaping . Adds visual or auditory impact. Acts as mirror in landscape. Provides habitat for wildlife. Effective for dividing units of landscape.

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Aquatic landscaping

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Aquatic landscaping

  • Creating artificial ponds, cascades and waterfalls

  • Adds serenity or motion

  • Aquatic landscaping

  • Adds visual or auditory impact

  • Acts as mirror in landscape

  • Provides habitat for wildlife

  • Effective for dividing units of landscape

  • Blue or green lighting makes dramatic effects at night

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Aquatic landscaping

  • Designs range from formal to natural

  • Even-radius curves and straight lines more formal than uneven-radius curves

  • Designing water features in landscape

  • Cut-stone edges more formal than irregular stone edge

  • Usually a point of emphasis in landscape

  • Position in low area of landscape where easily viewed

  • Or conceal in landscape to create sense of discovery (remainder of landscape must lead viewer to water)

  • Water gardens need 4-6 hours of light (too much light will encourage growth of algae)

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Aquatic landscaping

  • Masonary (cement)

  • Costly and difficult to build

  • Selecting pool type

  • Custom-made to fit into landscape

  • Preformed plastic or fiberglass pools

  • Easily built and inexpensive

  • Limited in size and shape

  • Pools made with flexible liners

  • Somewhat difficult to construct but least expensive

  • Custom-made to fit into landscape

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Aquatic landscaping

  • Size, shape and depth determined by hole

  • Remove rocks and other objects that might puncture lining

  • Construction of flexible liner pool

  • Add layer of sand or clay to protect liner

  • Liner will snug up against sides of hole when filled

  • Depth should vary

  • If including fish, deepest part must >30” or else you’ll make ‘fishsicles’ in winter

  • Make 9-12” soil benches on perimeter for submerged plants

  • Cut rocks at edge should also be placed on ‘shelf’

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Aquatic landscaping

  • Side view of design

  • Construction of flexible liner pool

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Aquatic landscaping

  • Top view of actual design

  • Construction of flexible liner pool

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Aquatic landscaping

  • Size and placement of liner

  • Size formula: 2Depth+Length x 2Depth+Width

  • Construction of flexible liner pool

  • Liner stretched over hole, keeping taut along bottom

  • Hold liner in place with rocks along edge

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Aquatic landscaping

  • Emergent

  • Rooted in bottom but produce leaves at or above the water surface

  • Types of aquatic plants

  • Examples: Arrowhead, cattail, water lily

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Aquatic landscaping

  • Submergent

  • Rooted in bottom; leaves remain below the surface of the water

  • Types of aquatic plants

  • Examples: Elodea, Parrot’s feather (invasive)

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Aquatic landscaping

  • Floating plants

  • Freely float on surface of water

  • Types of aquatic plants

  • Examples: Duckweed, Azolla (fairy moss)

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Aquatic landscaping

  • Marginal plants

  • Grow well in very moist soil (e.g. margins of ponds)

  • Types of aquatic plants

  • Examples: Iris, marsh marigold, ferns

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Aquatic landscaping

  • Aquatic plants grow in nutrient-rich soils high in organic matter

  • Soil for aquatic plants

  • Decomposition of organic matter produce methane-rich substrate (smelly!)

  • Suggest use of chemical fertilizers

  • Plants can be rooted into bottom of pond or (more often) in pots or crates

  • Use 50-50 mix of garden soil and sand

  • Plants can be over wintered in cool place inside

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Aquatic landscaping

  • Largest problem with artificial ponds is preventing algal growth

  • Maintaining water quality

  • Incorporate floating plants to shade water surface

  • Select fish that feed on algae (e.g. grass carp); don’t add too many fish

  • Use a submerged pump and filter

  • Mechanical filters trap debris in mats

  • Biological filters use bacteria to breakdown ammonia and organic waste

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Aquatic landscaping

  • UV sterilizer used to kill algae pond

  • Incorporate bacteria and enzyme ‘clarifiers’

  • Maintaining water quality

  • Chemicals such as algaecides

  • Maintain oxygen levels with running water

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Aquatic landscaping

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