Sediment capture ponds

Code
F09
Sector
Forest
Other sector(s)
Agriculture
Urban
Hydro Morphology
The complete description of the NWRM
Summary

Sediment capture ponds are engineered ponds placed in networks of forest ditches to slow the velocity of water and cause the deposition of suspended materials. Sediment capture ponds are most useful for managing the effects of ditch construction and maintenance, road work and final feeling. While used primarily in forests, sediment capture ponds may be a useful temporary measure for preserving water quality in and around construction sites or mines.  They may also be useful for capturing sediment in agricultural runoff. Sediment capture ponds have a limited lifespan, depending on how much suspended material is in the inflowing water. However, ponds can be maintained by removal of accumulated sediment. As most water protection methods, sediment capture ponds function well during base and moderate flow events. Catchment area, hydraulic properties of ditches, discharge rate and soil characteristics are among factors influencing functioning of sedimentation capture ponds. Effective functioning largely depends also on expertise and skill of professionals designing and implementing this and also many other measures.

Illustration(s)

Sediment capture pond, Slovakia

Source: Michal Kravcík’s presentation, NWRM Workshop 1 (Slovakia)

 

Possible benefits with level
Benefits Level
BP1 - Store runoff
Medium
BP2 - Slow runoff
Medium
BP3 - Store river water
Low
BP4 - Slow river water
Low
BP6 - Increase infiltration and/or groundwater recharge
Low
BP7 - Increase soil water retention
Low
BP8 - Reduce pollutant sources
High
BP9 - Intercept pollution pathways
High
BP10 - Reduce erosion and/or sediment delivery
High
BP12 - Create aquatic habitat
Low
ES1 - Water storage
Medium
ES2 - Fish stocks and recruiting
High
ES4 - Biodiversity preservation
High
ES5 - Climate change adaptation and mitigation
Low
ES6 - Groundwater/aquifer recharge
Low
ES7 - Flood risk reduction
Medium
ES8 - Erosion/sediment control
High
ES9 - Filtration of pollutants
High
PO1 - Improving status of biology quality elements
Low
PO2 - Improving status of physico-chemical quality elements
Low
PO3 - Improving status of hydromorphology quality elements
Low
PO4 - Improving chemical status and priority substances
Low
PO7 - Prevent surface water status deterioration
High
PO9 - Take adequate and co-ordinated measures to reduce flood risks
Low
PO10 - Protection of important habitats
Low
PO11 - Better protection for ecosystems and more use of Green Infrastructure
Medium
PO12 - More sustainable agriculture and forestry
High
PO13 - Better management of fish stocks
Medium
PO14 - Prevention of biodiversity loss
Medium

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