tidal flood Articles

  • Tidal technology to stop flooding

    A large 1.6 metre valve that stops tidal waters getting into the stormwater network will help stop flooding in the city centre during heavy rainfalls.   High tidal levels and heavy rain cause problems in Porirua, New Zealand.  Porirua was the first Council in New Zealand to test the valves, which are a Scandinavian design called WaStop. The Councils Water Services Engineer Desmond ...


    By WaStop International AB

  • Tidal Water case study

    References from WaStop International´s own patented products. WaStop solves problems in a secure and efficient way. Harwich harbour - ENGLAND Anglian Water is one of the leading providers of water and waste water services in Europe and serves the needs of around six million industrial, commercial and domestic customers. Aggressive tidal waters, silt and poor ...


    By WaStop International AB

  • One-dimensional hydrodynamic model accounting for tidal effect

    Tidal effect has a significant impact on flood routing in tidal rivers, conceptually taking on a resistant effect during flood tide and a dynamic effect during ebb tide. Two expressions were developed to reflect the tidal effect in this study, which consisted of the tidal wave velocity, the change rate of tidal level and the change in channel width. By incorporating the expressions into the ...


    By IWA Publishing

  • Challenges of Modeling a Tidal Influence Conveyance System, a Seattle, Washington Case Study

    Hydraulic modeling of a drainage basin usually involves system representation of a network that flows either by gravity downhill or a force main via an outfall to a receiving water body or a treatment plant. And calibration of such a system is usually straight forward. Occasionally, engineers encounter a “City of New Orleans” type of conveyance system, where most of the storm drain network is ...

  • Impact of floods, hurricanes and storms

    What happens to the water network in the wake of hurricanes and floods? Just days after Hurricane Harvey dumped over 50 inches of rain on the American state of Texas causing the deaths of 60 people and delivering billions of dollars worth of damage to homes and property, Hurricane Irma has wreaked havoc in the Caribbean with the most powerful Atlantic storm in recorded history. ...


    By Detectronic Ltd

  • The Thames flood series: a lack of trend in flood magnitude and a decline in maximum levels

    The flow series for the River Thames near its tidal limit is one of the most studied in the world. Its length and completeness, and the richness of the historical information which augments the formal flow record, ensures that the series is of immense value. However, the variability in flood magnitude and frequency that it captures needs to be interpreted with caution. The homogeneity of the time ...


    By IWA Publishing

  • Flood Forecasting and Warning Services in general

    An exact and early Flood Forecasting allows accordant early warning of persons concerned as much as the establishment of necessary measures (see Flood Protection, Evacuation and Rescue Plans). Therefore, it can make an important contribution to avoid damage. Flood Forecasting is in most cases based on extensive numerical modelling which is created with hydrological and hydraulic models of ...


    By IWA Publishing

  • Bringing in the tides. From closing down to opening up delta polders via Tidal River Management in the southwest delta of Bangladesh

    The southwest coastal delta of Bangladesh is not only geographically home to a dynamic interplay between land and water, and between fresh surface water and saline tides, but also to contentious debates on flood management policy. It has been argued that dealing with delta floods in this region boils down to adopting either open or closed approaches. This paper longitudinally structures the ...


    By IWA Publishing

  • Generating meshes for tidal wetland modeling using light detection and ranging (LiDAR) data

    A high resolution model mesh was required to numerically simulate sediment transport in tidal marshes. The timing of flooding is dependent on the tidal marsh ground elevation, which requires accurate topographic elevation data. The tidal prism of the marsh is determined by the volume provided by tidal channels in the system. Hence, their location and bathymetry needed to be represented ...


    By IWA Publishing

  • Living with floods in the Mahanadi Delta, India

    In October 2013, one of the fiercest cyclones to hit the Bay of Bengal for many years made landfall on the low-lying delta coast of the Indian state of Odisha. With winds battering the coastline at more than 200 kilometres per hour, the structural damage from cyclone Phailin was intense. Thousands of straw, timber and bamboo homes were destroyed across the delta of the River Mahanadi, one of ...


    By Wetlands International

  • ‘Smart’ flood alleviation system protects Portsmouth

    In late 2014, Southern Water completed a major project to reduce the risk of sewer flooding in parts of Portsmouth and Southsea. Substantial works were undertaken to divert runoff and tidal ingress, and a ‘smart’ hydrometeorological monitoring system was installed to enable prompt diversion of excess water during periods of high rainfall. Sewer level monitoring is undertaken in ...


    By The OTT Hydromet Group

  • Flood Risk Mapping for Scotland Takes Off

    Untitled Document Scotland has an area of roughly 79,000km2 and a population of five ...


    By Innovyze

  • Self closing flood barrier: Carrick on Suir, county Tipperary, Ireland

    Client: Office of Public Works, Ireland Project Detail: The historic river side town of Carrick on Suir in County Tipperary in Southern Ireland has long been prone to river and tidal flooding. This is an area which is heavily dependent upon having good access to the river since it is from the town’s North and South Quays, that fishermen launch ...


    By UK Flood Barriers Limited

  • InfoWorks RS aids priority river flood modeling in New Zealand

    Project Background Innovyze’s InfoWorks RS has been the key software in helping to formulate flood risk reduction strategies throughout the Northland Region of New Zealand, an area of approximately 14,000 km2 on the northern tip of New Zealand’s North Island. The Northland Region has a predominately tropical climate. In recent years a number of tropical storms have ...


    By Innovyze

  • WaStop Inline Check Valve protects Hull from Flooding - Case Study

    Location:  Hull, United Kingdom Client:  The Environmental Agency, Hull City Council & Associated British Ports Problem:  In December 2013 a storm surge caused water to over top the existing flood defence along the Humber frontage and on the Albert dock causing flooding and widespread damage. Once the water had over topped the ...


    By Wapro AB

  • Flood modeling and mitigation measures in an Urban Environment –Victoria, Australia - Case Study

    Abstract Accurate prediction of flood extents in urban catchments is extremely difficult without having a 1d/2d integrated modeling approach. The integrated flood modeling is becoming popular and a new benchmark for urban flood risk management studies. City of Glen Eira in Victoria, Australia is a developed metropolitan municipality. The council is responsible for the management ...


    By XP Solutions

  • Emergency scenarios in the Banger polder, Semarang City: a case study to identify different emergency scenarios

    In Semarang urban coastal areas experience daily flooding from the sea during high tide (tidal flooding). Flourishing residential areas have changed into unhealthy slums with the nuisance of daily flooding in parts of the city. To overcome these problems a polder system was implemented to address the tidal flooding. The Semarang polder system is the first fully operational polder system in a ...


    By IWA Publishing

  • Case Study - Waterwegen en Zeekanall NV - Hoboken on the River Schelde, Antwerp. Right Bank

    Architect: Johann van den Noort Timing: 2010 The Problem The yacht club at Hoboken is located on the right bank of the River Schelde, close to Antwerp. In spite of being many miles inland, the river is tidal at this point and at times of very high water and tidal surge from the North Sea, the industrial areas in the immediate ...


  • Case Study - Hoboken, Antwerp, Belgium

    The yacht club at Hoboken is located on the right bank of the River Scheldt, close to Antwerp. In spite of being many miles inland, the river is tidal at this point and at times of very high water and tidal surge from the North Sea, the industrial areas in the immediate hinterland are at risk of flood. The many dykes protecting the region had to be cut in order to allow access points and slip ...


    By AGGERES

  • Falkirk Council case study

    Falkirk County Council, Scotland Supply and installation and maintenance of a Trash Screen blockage and Flood Warning system, 2006 - ongoing Hydro-Logic was appointed by Falkirk County Council to supply, install and commission a series of 7 sites where there were concerns over flooding. The systems were deployed to supply alarms to a central control office at Falkirk ...


    By Hydro-Logic Services

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