Polyurban Waters

Category: Rivercourse

  • Phytoremediation in pollution hot spots

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    Utilization of phytoremediation for waste decontamination and pollution problems.

  • River Branching

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    Creation of a new river branch and flat riverbanks. The second river branch provides additional flood space. Benefits (+) Provide additional water storage capacity(+) Extra flood space by dividing the discharge into two branches and reduce flood Limitations (-) Significant land use changes (i.e. loss of agricultural land, resettlement etc.)(-) Limitation for river restoration if…

  • Reprofiling River Channel Cross Section

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    Reprofiling of the river channel cross-section towards a wider and more natural profile including shallow and deep waters and fast and slow flowing areas. Benefits (+) Allows sedimentation accumulation and prevent erosion of the riverbank.(+) Discharge capacity of floodwater could be increased.(+) Reduce the flood risk. Limitations (-) Conflict with the neighboring population interests where…

  • Renaturation / Revegatation of Water Courses

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    The NbS focuses on the de-culverting of covered watercourses by the removal of concrete layers as culverting watercourses lead to the degradation of habitats and increases water pollution. This process can be combined with a re-naturalisation of the channel by opening and allowing natural development of riverbed. Benefits (+) Create more space and increased storage…

  • Re-meandering of Rivers

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    Re-meandering the restoration of original curves of the river course by creating new meanders and reconnecting old cut-off ones. Re-meandering aims at reducing the water flow and increasing the length of the river leading to increased water storage capacity. Benefits (+) Slowing the velocity of the river(+) Erosion reduction(+) Aesthetical value Limitations (-) Heavy engineering…

  • Planted Embankment Mat

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    Fast rotting mats (jute or coconut) covered with vegetation are installed along the riverbank to prevent erosion. Benefits (+) Stabilize the riverbank and provides erosion control and water bank Limitations (-) Needs a certain growing time until the vegetation is fully developed(-) Difficulties in calculating river banks stability Assessment

  • Living Weirs

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    Living weirs are created by constructing a bamboo grid across a river and filling it with sandbags that contain natural materials like sand, coconut coir, and manure. Various trees and plants are planted along the riverbanks to stabilize the soil, with banyan trees specifically planted on either side of the weir. Over time, these banyan…

  • Living Revetmens with Cuttings

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    Living weirs are created by constructing a bamboo grid across a river and filling it with sandbags that contain natural materials like sand, coconut coir, and manure. Various trees and plants are planted along the riverbanks to stabilize the soil, with banyan trees specifically planted on either side of the weir. Over time, these banyan…

  • Living Fascine

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    Fascines are tubular bundles of brunches and twigs that are installed in trenches along hillsides or riverbanks for stabilization Benefits (+) Waterside reinforcement (+) Protect hillsides and riverbanks from erosion (+) biodiversity Benefits by habitat creation Limitations (-) The stability of the hillside is hard to determine/foresee Assessment

  • Floodplain Riparian Woodland

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    Floodplain riparian woodlands are forests along the regularly flooded areas. The forest can act as a shelterbelt along the floodplain and reduce peak flows by 13 – 48% Benefits (+) Reduce the risk of river flooding(+) protect aquatic ecology by providing shade and preventing too-high water temperatures. Limitation (-) Riparian woods can overgrow the river…