flood level Articles

  • Culvert trash screen blockage warning

    Wychavon District Council commissioned Hydro-Logic to install a system to monitor rising flood levels on the Bengeworth Brook in the Evesham area. Residents had been particularly vulnerable to the effects of 'trash screen' blockages at a culvert location. Storm events similar to the 2007 summer floods had caused particular maintenance problems for the Engineering Team at Wychavon. Design and ...


    By Hydro International UK

  • Flood disaster level evaluation using a particle swarm optimization algorithm considering decision maker's preference

    There has been an increasing demand for accurately evaluating flood disaster levels in order to improve public safety and management of water resources. This article reviews the characteristics of the existing subjective and objective assessment methods, and introduces decision maker's preferences in the particle swarm optimization (PSO) algorithm for a better assessment of flood disaster ...


    By IWA Publishing

  • Flood control in an urban drainage system using a linear controller

    Effective management of floods in densely populated urban areas poses a great challenge. Computer modeling plays an important role in appropriate management of urban drainage systems. In this study an effort has been made to develop an efficient urban drainage model in which hydraulic results obtained from the developed SWMM model have been linked with a Proportional Integral Derivative (PID) ...


    By IWA Publishing

  • FRA: Quarrying case study

    Hanson Aggregates Provision of hydrological, hydraulic and flood risk services Hydro-Logic has been engaged since 2002 on a series of investigations for Hanson Aggregates throughout England. The majority of these investigations relate to proposed sand and gravel extraction in flood prone areas. Additional investigations have been undertaken for monitoring and consent compliance. The ...


    By Hydro-Logic Services

  • Reassessing flood frequency for the River Trent through the inclusion of historical flood information since ad 1320

    The estimation of return periods for floods likely to have significant societal impact is challenging unless suitably long records exist. Relatively few sites across the UK provide a continuous record of river level or discharge over 50 years, whilst records extending back to the nineteenth century are rare. This represents a significant problem in providing robust and reliable estimates of ...


    By IWA Publishing

  • Rapid Drawdown / Rapid Filling

    Rapid drawdown is one of the most severe loading conditions that can occur along drainage channels. During spring flooding the levels in canals can be high. Once the floodwaters recede, the levels in these drainage channels can drop quite rapidly and result in shallow slope failures. These shallow failures can lead to large slope deterioration if they are left unattended.Analysis of rapid ...


    By SoilVision Systems Ltd.

  • Hirschthal, Switzerland protected with WaStop DN1200 - Case Study

    Location: Hirschthal, Switzerland Problem: During times of high river levels, flooding occurred in the town of Hirschthal. This flooding occurred when the river level was higher than the stormwater outfall. This lead to river water pushing back up the outfall pipe, and spilling onto roads and residential areas. Solution: A DN1200 (NPS 48″) ...


    By Wapro AB

  • Decision Support Tools Management/ Operation

    Floreto Floreto is a three-tier software application consisting of a User Interface, Functional Module and Database. It was developed for decision support in property level flood mitigation. As an outcome of the system, the mitigation scenarios for improvement of the built-on environment are obtained, based on the technically appropriate measures tailored to the users own property data and ...


    By IWA Publishing

  • A WebGIS-based flood control management system for small reservoirs: a case study in the lower reaches of the Yangtze River

    Small reservoirs are important to flood control and water resource utilization in local areas. This study proposes a WebGIS-based flood control management system to support the flood discharge of small reservoirs during intensive rainfall in the flood season. The agile software development method and a loosely coupled structure are used to combine multidisciplinary knowledge from different ...


    By IWA Publishing

  • Assessing national flood management using a sustainable flood management framework

    This paper presents a prototype framework for sustainable flood management at the national level which features stakeholder participation, and is modified and applied to a case study. Through literature reviews and an interview survey of South Korea (the case study country), the causes of recent flood damage are found to be heavy rainfall due to climate change, urbanization, insufficient channel ...


    By IWA Publishing

  • Application of modified Manning formula in the determination of vertical profile velocity in natural rivers

    Seldom studied before, the vertical profile velocity is indicative of the flood process and nutrient transportation process. In this paper, a substitution of cross section hydraulic radius with vertical depth was made to the Manning formula, which was then applied in the vertical profile velocity determination. Simultaneously, the determination accuracy and its relationship with hydraulic ...


    By IWA Publishing

  • Improving calibration of two key parameters in Hydrologic Engineering Center hydrologic modelling system, and analysing the influence of initial loss on flood peak flows

    Parameter calibration is a key and difficult issue for a hydrological model. Taking the Jinjiang Xixi watershed of south-east China as the study area, we proposed methods to improve the calibration of two very sensitive parameters, Muskingum K and initial loss, in the Hydrologic Engineering Center hydrologic modelling system (HEC-HMS) model. Twenty-three rainstorm flood events occurring from ...


    By IWA Publishing

  • Combining Socio-Technical and Ethical DImensions of Flood Risk Mitigation

    The aim of the current research was to develop a methodology that combines social, technical and ethical dimensions for flood risk assesment and evaluation of flood mitigation measures. A unique combination of scientific, social and ethical approach was developed to fulfil the objectives . Social justice criteria were developed with the purpose to assess in qualitative and quantitative way the ...


    By IWA Publishing

  • Tickville Gulch Turf Reinforcement Mats - Case Study

    The Vmax SC250 Turf Reinforcement Mat provides a revegetation option able to withstand FEMA-set high flow rates A drainage canal serving several farms and registered as a U.S. Waterway needed to be redirected to accommodate new development. Federal regulations and soft soils throughout the project area required special considerations for the channel lining and material anchoring. ...


    By Nilex

  • Multi-year optimal operation strategy of Danjiangkou Reservoir after dam heightening for the middle route of the south–north water transfer project

    The middle route of the south–north water transfer project (SNWTP) was built to relieve the pressure of increasing water demand in northern China. Serving as one of the major storage systems, optimal operation rules should be proposed promptly for Danjiangkou Reservoir, completed by a heightening project. In this paper, in order to seek out the optimal operation rules for Danjiangkou ...


    By IWA Publishing

  • Hydrological projections based on the coupled hydrological–hydraulic modeling in the complex river network region: a case study in the Taihu basin, China

    Water resources in the Taihu basin, China, are not only facing the effects of a changing climate but also consequences of an intensive urbanization process with the abandonment of rural activities and the resulting changes in land use/land-cover. In the present work, the impact of climate change and urbanization on hydrological processes was assessed using an integrated modeling system, coupling ...


    By IWA Publishing

  • The impact of fluctuation of the Nile River level on water composition

    This paper studies the influence of fluctuation of the Nile River level on water composition. The Nile River could be classified to four periods according to level. The periods are flood, intermediate, drought and intermediate. The present study investigates the biological and chemical analysis of water at all periods of the Nile River. The results show that the algae count ranged from 221 to ...


    By IWA Publishing

  • Civil engineering projects

    Location  Slidell, LA Unit  C-3315 and C-4315 Project  Retaining wall The beauty of living in waterfront areas comes with the danger of floods from seasonal hurricanes and tropical storms. It is important, therefore, to build above the designated flood-elevation plain. A product is sometimes needed to elevate a property, by use of mass-gravity retaining walls. At the site ...


    By HESCO Bastion, Inc.

  • The role of mangroves in disaster mitigation: a review

    The aim of this paper is to study the role played by mangrove ecosystems in minimising the impact of disasters like tsunami, floods and cyclones. A comparison of the studies concerning effective mitigation of tsunami and natural disasters by mangrove ecosystems was carried out for countries with special focus on India. A study about the role of mangroves across various states in India is also ...


    By Inderscience Publishers

  • ArmorMax® is Solution for Bank Stabilization in NRCS Emergency Watershed Protection Program, Kissimmee, FL case study

    PROJECT SUMMARY Years of flash flooding and fluctuating water levels in the West City Ditch made for a dangerous scenario. The City of Kissimmee secured NRCS EWPP grant money to stabilize the ditch before catastrophic infrastructure damage occurred, but the budget was too small for full protection with conventional hard armoring. Propex worked with engineers to model slope stability in rapid ...

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