definitionFlexible water level management involves anticipating precipitation that has been forecast. The water level is lowered before a shower is expected, to create additional water storage capacity. By using flexible natural fluctuations in the water level, improvements can be achieved in rainfall runoff characteristics. In wet periods water levels are allowed to rise, in dry periods water levels are allowed to lower. This reduces the use of pumping stations or water inlet systems.
(Urban Green-Blue Grids for sustainable and resilient cities, Flexible water level management, accessed on Sept. 2016) Example of this measure is the management of water level of swamps which establishes water level management arrangements in existing marshes during pre-alert, alert and after crisis and enabling/increasing water storage capacity.
Co-benefits and impactsIf a link between meteorological data and water level management is developed and eventually optimised, less surface water from other areas needs to be fed in and less seepage occurs. Since the water is almost always at the maximum level, salinization is reduced. Further, flexible water level management enables the facilitation of water drainage and removal. It may also result in system optimisation and reduce of localised flooding. This can also help to manage water and optimise its availability during droughts.
Case studies (Show all)Combined measures, Karlstrup Mose, Denmark
Management of water level of swamps, Les Boucholeurs
FRI indicators (Show all)Availability of hydraulic structures for river watershed management capable to reduce peak discharges
Availability of hydraulic structures within urban system capable to reduce peak discharges
Availability of flood-proofing constructions of strategic infrastructures
Sufficient storage capacity of the urban drainage system to accept flood water
Responsible authorities Learning and adapting from previous events
Multidisciplinary knowledge exchange (engineer, architect/urban planner, sociologist, economist, politician - city government, etc.)
Knowledge exchange between scientific community and authorities
Illustrations (Show all)rm_images/London-Wetland-Centre-01-Jeremy-Floyd-1300x650.jpg
Last modified: Jan. 18, 2017, 6:21 a.m.