Essays about: "Investigation in clay"

Showing result 1 - 5 of 40 essays containing the words Investigation in clay.

  1. 1. High levels of nickel from sulphide soil in Umeå's raw water : Modeling of groundwater flow and mass transport in Forslunda aquifer

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Merhawi Belai; [2024]
    Keywords : nickel; sulfide; sulphide; groundwater; modeling; mass transport; Feflow; Umeå; nickel; sulfid; monosulfid; grundvatten; modellering; masstransport; Feflow; Umeå;

    Abstract : The raw water in some of Umeå's abstraction wells has shown high nickel levels for more than a decade. The cause has not been determined but there is an investigation from 2010 where the results indicate sulphide clay found adjacent to two basins used for artificial infiltration. READ MORE

  3. 2. Geological 3D Modelling ofthe File Hajdar Quarry, Slite

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Friberg Nils; [2023]
    Keywords : 3D-modelling; Cementa; limestone; resistivity; Gotland; 3D-modellering; Cementa; kalksten; resistivitet; Gotland;

    Abstract : Located on the island of Gotland, Sweden, the File Hajdar limestone quarry is an important locality for domestic cement production. With depositional settings generally related to shallow sea carbonate ramps, the lithologies encountered on File Hajdar range from reef-associated limestone units to more basinal deposition of marls. READ MORE

  4. 3. Evaluating the Undrained Shear Strength of Sulphide-Bearing Soils in the Sundsvall Area

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Gustaf Holm; [2022]
    Keywords : Clay; cone factor; CONRAD; CPT; fall cone; field vane test; reduction; CONRAD; CPT; fallkonförsök; konfaktor; lera; reduktion; vingförsök;

    Abstract : Sulphide soils in Sweden are mainly found along the northeast coastline. These soils area characterized by their fine grain size, low shear strength and black, or grey, color. These soils are also found further south, in the Sundsvall area in Västernorrland, but have slightly lower sulphide content there. READ MORE

  5. 4. Sustainable concrete bridges : An investigation of possible measures to reduce the climate impact

    University essay from Luleå tekniska universitet/Byggkonstruktion och brand

    Author : Daniel Hugh; [2022]
    Keywords : Bridges; CO2; emission; cement; reinforcement; SCM; sustainability.;

    Abstract : The need of building new bridges is always existing in relation with the increase of infrastructureand transport needs. Bridge constructions have traditionally been associated with highconsumption of resources and large greenhouse gas emissions. READ MORE

  6. 5. The role of bed sediments for sorption of phosphorus in remediated ditches in Sweden

    University essay from SLU/Dept. of Soil and Environment

    Author : Linus Holgersson; [2022]
    Keywords : Phosphorus; Two-stage ditch; Equilibrium phosphate concentration; Phosphorus retention; Eutrophication; Soluble reactive phosphorus;

    Abstract : Human activities have increased nutrient losses to agricultural ditches and streams, including phosphorus. Phosphorus leakage leads to a worsening of water quality in downstream ecosystems, including lakes and seas. In addition, higher phosphorus concentrations lead to eutrophication, which negatively affects aquatic systems. READ MORE