Restoration and reconnection of seasonal streams

Code: 
N06
Sector: 
Hydro Morphology
The complete description of the NWRM: 
Summary: 

Seasonal streams or intermittent rivers are rivers for which surface water ceases to flow at some point in space and time. They comprise a large proportion of the global river network and are characterized by dynamic exchanges between terrestrial and aquatic habitats. These habitats support aquatic, semi-aquatic, and terrestrial biota. Seasonal streams provide essential ecosystem services to society, including flood control and irrigation. The abundance and distribution of seasonal streams, and their natural intermittent flow regimes, are being altered by climate change, water abstraction and inter-basin transfers. Despite their values and ongoing alterations, seasonal streams are chronically under-studied and protective management is inadequate. Restoring and reconnecting seasonal streams with the river consists in, therefore favouring the overall functioning of the river by restoring lateral connectivity, diversifying flows and ensuring the proper functioning of these seasonal streams for a better water retention during floods.

Illustration(s): 

 

Tributary useful during flooding, (Scotland, UK)

Source: http://www.fadsdirectory.com/flood-alleviation

Possible benefits with level: 
Benefits Levelsort descending
PO9 - Take adequate and co-ordinated measures to reduce flood risks High
PO10 - Protection of important habitats High
PO11 - Better protection for ecosystems and more use of Green Infrastructure High
ES4 - Biodiversity preservation High
ES8 - Erosion/sediment control High
BP1 - Store runoff High
BP3 - Store river water High
BP4 - Slow river water High
PO4 - Improving chemical status and priority substances High
PO14 - Prevention of biodiversity loss High
BP2 - Slow runoff High
BP6 - Increase infiltration and/or groundwater recharge High
BP10 - Reduce erosion and/or sediment delivery High
BP13 - Create riparian habitat High
BP12 - Create aquatic habitat Low
PO14 - Prevention of biodiversity loss Low
PO8 - Prevent groundwater status deterioration Low
PO12 - More sustainable agriculture and forestry Low
ES3 - Natural biomass production Low
BP5 - Increase evapotranspiration Low
BP8 - Reduce pollutant sources Low
BP11 - Improve soils Low
BP15 - Enhance precipitation Low
BP16 - Reduce peak temperature Low
BP17 - Absorb and/or retain CO2 Low
PO1 - Improving status of biology quality elements Medium
PO3 - Improving status of hydromorphology quality elements Medium
PO7 - Prevent surface water status deterioration Medium
PO13 - Better management of fish stocks Medium
ES1 - Water storage Medium
ES2 - Fish stocks and recruiting Medium
ES6 - Groundwater/aquifer recharge Medium
ES7 - Flood risk reduction Medium
ES9 - Filtration of pollutants Medium
ES11 - Aesthetic/cultural value Medium
PO2 - Improving status of physico-chemical quality elements Medium
PO5 - Improving quantitative status Medium
PO6 - Improving chemical status Medium
ES5 - Climate change adaptation and mitigation Medium
BP7 - Increase soil water retention Medium
BP9 - Intercept pollution pathways Medium
Case study(ies): 
Last updated: 08 Jun 2015 | Top