Difference between revisions of "Channelisation / cross section alteration"
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==Useful references== | ==Useful references== | ||
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| + | Brookes, A., 1990. Restoration and enhancement of engineered river channels: Some | ||
| + | european experiences. River Research & Applications 5: 45–56. | ||
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==Other relevant information== | ==Other relevant information== | ||
[[Category:Pressures]][[Category:04. Morphological alterations]] | [[Category:Pressures]][[Category:04. Morphological alterations]] | ||
Revision as of 17:34, 16 February 2015
Contents
Channelisation / cross section alteration
04. Morphological alterations
General description
Channelization refers to river and stream channel engineering undertaken for the purposes of flood control, navigation, drainage improvement, and reduction of channel migration potential (Brookes, 1990[1]). When channelization involves cross section alteration, this includes activities such as channel enlargement through widening or deepening, the reduction of flow resistance through clearing or snagging of riparian, and sometimes aquatic, vegetation and other roughness elements, and the introduction of bank facing and reinforcement materials. These forms of morphological modification typically transform channel cross profiles into uniform, smooth, trapezoidal or rectangular forms. Cross section alteration can also include embankment, levee or dike construction, which further enlarge the channel capacity, prevent channel-floodplain connectivity, and can induce very high flow velocities within the river channel during floods.
Effect/Impact on (including literature citations)
- HYMO (general and specified per HYMO element)
- physico - chemical parameters
- Biota (general and specified per Biological quality elements)
Case studies where this pressure is present
- Fish_ramp_Baumannsbrücke
- current_deflector_Eichenfelde
- Opijnen_-_Side_Channel
- Gameren
- Freienbrink
- Regelsbrunner_Aue
- DOÑANA/RESTAURACIÓN_DEL_ARROYO_DEL_PARTIDO
- Charlottenburg_artificial_bay
- Charlottenburg_wave-protected_shallow
- Mönchwinkel_Altarm
- sheet_pile_protected_shallow_new
- sheet_pile_protected_shallow
- Westlicher_Abzugsgraben
- Fish_ramp_Friedrichsgüte
- Vén_Duna_-_side_arm_reopening
- Ems_floodplain_(LIFE_project)
- Renaturierung_Untere_Havel
- Meander_fish_ramp_Erpe_BB
- Fish_ramp_Erpe_BB
- Fish_ramp_Erpe_Berlin
- Vallacuera_ravine._Removal_of_a_dyke.
- Millingerwaard
- Bemmelse_Waard_–_Restoring_former_floodplains_(INTERREG_Sustainable_Development_of_Floodplains)
- Fovant_-_Demonstrating_strategic_restoration_and_management_STREAM_(LIFE05_NAT/UK/000143)
- Heessen_-_Optimisation_of_the_pSCI_“Lippe_floodplain_between_Hamm_and_Hangfort”_(LIFE05/NAT/D/000057)
- Ahlen-Dolberg_-_Optimisation_of_the_pSCI_“Lippe_floodplain_between_Hamm_and_Hangfort”_(LIFE05/NAT/D/000057)
- Eggenstein-Leopoldshafen_-_Living_Rhine_floodplain_near_Karlsruhe_(LIFE04_NAT/DE/000025
- Northern_Sweden_-_From_source_to_sea,_restoring_river_Moälven_(LIFE05_NAT/S/000109)_
- Aaijen_-_Removal_of_Bank_Fixation
- Klebach_-_Side_channel
- Deva_River._Bank_protection_on_the_right_bank_of_the_Deva_River_in_Molleda
- Olivenza._Hydrological_and_Forestry_Restoration_of_the_Olivenza_riverside,_2ª_phase
- Tordera_-_Restoration_of_a_secondary_channel_of_the_Tordera_River
- Narcea
- Odra._Actions_for_environmental_restoration_and_flood_control_in_the_lower_basin_of_the_Odra_River_(Burgos)
- Bakenhof_-_Dyke_relocation
- Niederwerrieser_Weg_-_Optimisation_of_the_pSCI_“Lippe_floodplain_between_Hamm_and_Hangfort”_(LIFE05/NAT/D/000057)
- Soest_-_Optimisation_of_the_pSCI_“Lippe_floodplain_between_Hamm_and_Hangfort”_(LIFE05/NAT/D/000057)
- Lek_bij_Everdingen_-_Groyne_Shields
- Bouxweerd
- Nansa_River._Morphological_and_functional_restoration_of_the_Nansa_River_at_Muñorrodero
- Bergen_-_Removal_of_Bank_Fixation
- Polder_Ingelheim_–_Restoring_former_floodplains_(INTERREG_Sustainable_Development_of_Floodplains)
- Amesbury_on_the_river_Avon_-_Demonstrating_strategic_restoration_and_management_STREAM_(LIFE05_NAT/UK/000143)
- Stream_-mending_the_Avon
- River_Quaggy,_Chinbrook_Meadows
- River_Ravensbourne_at_Cornmill_Gardens
- Pastures_Bridge_Rehabilitation
- Blenheim_Palace_Project
- Inchewan_Burn_Bed_Restoration
- River_Roding_at_Ray_Lodge_Park
- River_Brent_at_Tokyngton_Park
- Upper_Woodford_-_Demonstrating_strategic_restoration_and_management_STREAM_(LIFE05_NAT/UK/000143)
- River_Wensum_Rehabilitation_Project
- River_Skerne_EU-LIFE_project
- Oberwerries_-_Optimisation_of_the_pSCI_“Lippe_floodplain_between_Hamm_and_Hangfort”_(LIFE05/NAT/D/000057)
- Sella
- Arga._Mejora_Ambiental_del_meandro_del_Plantío
- Asseltse_Plassen_-_Bank_erosion
- Beneden-Leeuwen_-_Side_channel
- Vreugderijkerwaard_-_Side_channel
- Skjern_-_LIFE_project
- Stream_valleys_in_the_Arnsberger_forest_(LIFE_project)
- Weissenthurm
- Chícamo_Life_project._Conservation_of_Aphanius_iberus´_genetics_stocks_(_Murcia_).
- Haselünne
- Uilenkamp
- Rijkelse_Beemden_-_River_bed_widening
- Zújar.
- Hondsbroeksche_Pleij_–_Restoring_former_floodplains_(INTERREG_Sustainable_Development_of_Floodplains)
- Chilhampton_-_Demonstrating_strategic_restoration_and_management_STREAM_(LIFE05_NAT/UK/000143)
- Woodgreen_-_Demonstrating_strategic_restoration_and_management_STREAM_(LIFE05_NAT/UK/000143)
- Karlsruhe_–_Living_Rhine_floodplain_near_Karlsruhe_(LIFE04_NAT/DE/000025)
- Buiten_Ooij_-_Sluice_operation_
- IJssel
- Stora
- River_Rhine_-_IJsseluiterwaarden_Olst
- Scheldt_-_Vallei_Grote_Nete
- River_Cole_EU-LIFE
- Rhine_-_Meinerswijk
- Hampshire_Avon_-_Hale
- Rhine_-_Polder_Altenheim
- Restoration_and_remeandering_of_the_Müggelspree_-_downstream_Mönchwinkel
- Drava_-_River_Widening_Amlach/St._Peter
- Drava_-_River_Widening_Obergottesfeld
- Drava_-_River_Widening_Rosenheim
- Rhine_-_Nebenrinne_Bislich-Vahnum_(LIFE08_NAT/D/000007)
- Meuse_-_Overdiepse_Polder
- Rhine_-_Emmericher_Ward_(LIFE10_NAT/DE/000010)
- Regge_Velderberg
- Dommel_Eindhoven
- Narew_river_restoration_project_
- Lower_Traun
- Middle_Warta_River_Valley
- Lippeaue_Klostermersch
- Ruhr_Binnerfeld
- Anzur._Intervención_de_mejora_ambiental_de_un_tramo_del_Río_Anzur,_en_la_Aldea_del_Nacimiento,_en_el_Término_Municipal_de_Rute_(Córdoba).
- Drava_-_Kleblach
- Thur_
- Töss
- Enns_-_Aich
- Cölbe
- Vääräjoki_-_Niskakoski
- KUIVAJOKI
- Emån_-_Emsfors
- Mörrumsån_-_Hemsjö
Possible restoration, rehabilitation and mitigation measures
- Add/feed sediment
- Favour morphogenic flows
- Remeander water courses
- Widen water courses
- Shallow water courses
- Allow/increase lateral channel migration or river mobility
- Narrow water courses
- Create low flow channels in over-sized channels
- Initiate natural channel dynamics to promote natural regeneration
- Remove bank fixation
- Recreate gravel bar and riffles
- Remove or modify in-channel hydraulic structures
- Remove bank fixation
- Lower river banks or floodplains to enlarge inundation and flooding
- Set back embankments, levees or dikes
Useful references
Brookes, A., 1990. Restoration and enhancement of engineered river channels: Some european experiences. River Research & Applications 5: 45–56.
Other relevant information
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