Essays about: "HEC-RAS"

Showing result 11 - 15 of 30 essays containing the word HEC-RAS.

  1. 11. Estimating the probability of levee failure for flood risk mapping : An application to Paglia River

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Theodora Neromylioti; [2020]
    Keywords : Levee failure; inner erosion; piping; backward erosion; seepage; probability of failure; fragility curves; time-dependent failure; hydraulic modelling; flood risk; flood inundation; HEC-RAS;

    Abstract : Climate change results to more extreme and frequent flood events that induce extra risk to flood protection structures such as levees. Thus, estimation of the probability of levee failure is of utmost importance when it comes to structural safety and flood risk assessment. READ MORE

  3. 12. Evaluation of Local Scour along Rönne Å at Ängelholm

    University essay from Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Author : Mohamed Fainaz Mohamed Inamdeen; [2020]
    Keywords : HEC RAS; Rönne å; Bend scour; Contraction scour; Abutment scour; River flow; HEC 18; Technology and Engineering;

    Abstract : Riverbed scouring is an emerging problem aligned with higher frequent river discharges, experiences in a short period of time with shifting climate conditions. This problem brings a huge challenge to relevant authorities to safeguard river stability and hydraulic structures. READ MORE

  4. 13. 2D Effects of Geomorphology and Discharge on Hyporheic Exchange—a HEC-RAS Modelling Study

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Olivia Preston; [2020]
    Keywords : average hyporheic exchange velocity; water surface elevation; water surface concavity; hydrostatic head;

    Abstract : Hyporheic exchange is an ecologically and biogeochemically essential function of rivers and streams. One important driver of hydrostatic (hyporheic) exchange is gra- dients in the hydrostatic hydraulic head at the streambed. READ MORE

  5. 14. Optimizing the design of two-stage ditches to improve nutrient and sediment retention

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sofia Englund; [2020]
    Keywords : eutrophication; water quality; mitigation measure; two-stage ditch; retention time; water retention; nutrients; sediments; vegetation; terrace; HEC-RAS; Manning’s coefficient; water level; climate change; övergödning; vattenkvalitet; begränsande åtgärd; tvåstegsdike; retentionstid; vattenretention; näringsämnen; sediment; vegetation; terrass; HEC-RAS; Manning’s koefficient; vattennivå; klimatförändring;

    Abstract : Negative effects on water quality are created by eutrophication of the world’s water resources. Mitigation measures have been implemented, but poor improvements in water quality have been observed. Two-stage ditches have the possibility to increase nutrient and sediment retention to reduce eutrophication in receiving water bodies. READ MORE

  6. 15. Physico-chemical evaluation of the water quality in Rocha River: A qualitative and comparative analysis including aspects of social and environmental factors

    University essay from Lunds universitet/Teknisk geologi

    Author : Stina Jacobson; Ida Sekizovic; [2019]
    Keywords : Cochabamba; Rocha River; water quality analysis; water pollution; wastewater; regulations; ICO-index; Hec-RAS; minor field study; Technology and Engineering; Earth and Environmental Sciences;

    Abstract : In this study, a physico-chemical analysis of the Rocha River was performed during the beginning of the rainy season 2018 in order to examine the current state of the water quality in the river at six different locations. The river, located in the Cochabamba department, Bolivia, was examined from upstream in Sacaba to downstream in Sipe Sipe. READ MORE