Case study:Stabilization of hydrological situation on the Neznaika River

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Location: 55° 33' 48.13" N, 37° 16' 33.30" E
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, Flood risk management, Hydromorphology
Country Russia
Main contact forename Andrey
Main contact surname Pyatov
Main contact user ID
Contact organisation CentrRegionVodHoz
Contact organisation web site http://http://www.fgwu.ru/
Partner organisations
This is a parent project
encompassing the following
projects
Neznaika river bed re-designing

Project summary

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The Neznaika river originates northeast village Aprelevka of Moscow Oblast and flows into the Desna river at the left bank on a distance of 30 km from the mouth. The river is 32 km long. Water regime of the river is characterized by high spring floods, and little discharge in winter and summer/autumn low-water period, that is sometimes interrupted by rain floods. Due to the intensive overgrowing shrubs and weeds, littering and silting of the riverbed within the reach of the Serednevo Village there has been a marked tightness of the bed and erosion of the banks in recent years. All these adversely affect the run-off ability of the spring and rain floods and lead to an annual overflow the channel of the river to the surface (depth of flood - 0.8-1.0 m) and flooding private land (gardens), outbuildings (workhouses, cages for kettle) and houses for a relatively long period of time. Currently, there has been a particularly dangerous situation in the area of low water bridge over the Neznaika river due to quick erosion of the right bank of the river.

Works included:

  • Re-profiling of the river bed with a bottom width of 1.5 m and slopes 1:2.5 (in some places 1:2) facing the natural surface.
  • Removal of sediment along the entire length of area restored by applying the multifunctional machine TRUXOR DM5000.

Monitoring surveys and results

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Catchment and subcatchment



Site

Name Neznaika River
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body No
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

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Cost for project phases

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Investigation and design
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Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure Flood risk management
Hydromorphology Quantity & dynamics of flow, Width & depth variation
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Creation of revetments, Fenced off riverbank, Bank stabilisation, Cut back of trees, Tree management
Floodplain / River corridor Removal of sediments
Planform / Channel pattern Change in bed profile
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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Physico-chemical quality elements

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Any other monitoring, e.g. social, economic

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Monitoring documents



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Supplementary Information

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