Code F09 Year of Issue none Sector Forest Other sector(s) Agriculture Urban Hydro Morphology The complete description of the NWRM f9_-_sediment_capture_ponds.pdf 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, SlovakiaSource: 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 Case study(ies) Rural runoff attenuation in the Belford catchment, UK Sediment capture ponds in the Latvian State forests