Sökning: "Hydraulic gradients"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Hydraulic gradients.

1. 1. Design and Optimisation of an Aquifer Storage and Recovery System - Options for long term storage under natural hydraulic gradients

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk geologi

   Författare :Simon Kreipl; [2021]
   Nyckelord :Aquifer storage and recovery; well-field design; groundwater modelling; numerical modelling; FEFLOW; Technology and Engineering;

   Sammanfattning : Aquifer storage and recovery (ASR) is a concept where water is stored in an aquifer during times when it is available, thus creating artificial groundwater, which can later be recovered by pumping when it is needed (Pyne, 1995). One ASR cycle consists of a injection, a standby and a recovery phase. LÄS MER

3. 2. Numerical and experimental analysis of fluid flow in fracture replicas with variable aperture

   Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Brandon Stock; [2020]
   Nyckelord :;

   Sammanfattning : Flow in fractured rocks has been intensively studied in the last decades, in part due to plans in manycountries to site repositories for high level nuclear waster in deep geologic formations. All investigated crystalline rocks have been found to be fractured and the majority of water flows through these fractures andfracture zones. LÄS MER

4. 3. Spatial and Temporal Variations in a Perennial Firn Aquifer on Lomonosovfonna, Svalbard

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Monika Hawrylak; Emma Nilsson; [2019]
   Nyckelord :perennial firn aquifer; ground penetrating radar; Svalbard; Lomonosovfonna; flerårig firnakvifer; georadar; Svalbard; Lomonosovfonna;

   Sammanfattning : A firn aquifer is a type of englacial water storage that forms when surface meltwater fills up the pore space in porous firn. If the retention time exceeds one year the feature is regarded as perennial. The melt and accumulation rates as well as the available pore space determine the formation and extent of the firn aquifer. LÄS MER

5. 4. Transport and retention of heavy metals in contaminated soil and groundwater : A case study from Pukeberg glassworks in Småland, Sweden

   Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Gitte Laallam; [2017]
   Nyckelord :Hydrology; hydrogeology; contaminated areas; heavy metals; hydrologi; hydrogeologi; förorenade områden; metaller;

   Sammanfattning : As much as 80 000 sites, including landfills from glass production industries, are estimated to be contaminated in Sweden. One of these landfills is located near the glassworks factory of Pukeberg, in the municipality of Nybro, Southeast Sweden. LÄS MER

7. 5. Laboratory investigation of suffusion on dam core glacial till

   Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Författare :Daniel Yadetie Tuffa; [2017]
   Nyckelord :Internal erosion; Suffusion; Filter; Core; Glacial till; Embankment dam; Hydraulic gradients;

   Sammanfattning : The objective of this study is to provide a better understanding of suffusion characteristics of glacial soils and to present a simple yet reliable assessment procedure for determination of suffusion in the laboratory.Internal erosion by suffusion occurs in the core of an embankment dam when the ability of the soil to resist seepage forces is exceeded and voids are large enough to allow the transport of fine particles through the pores. LÄS MER