Essays about: "provtagare"

Found 5 essays containing the word provtagare.

  1. 1. How does hydropeaking and geological substrate affect aquatic macroinvertebrates in a regulated river?

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Andreas Vernby; [2021]
    Keywords : Hydropeaking; geological substrate; aquatic macroinvertebrates; EPT species; Hester-Dendy samplers; Korttidsreglering; geologiskt substrat; akvatiska makroevertebrater; EPT; Hester-Dendy-provtagare;

    Abstract : Hydropower is an important source of renewable energy, but is often a cause of degradation to river ecosystems. Hydropeaking, i.e. the frequent alteration of discharge, is a process involved in hydropower generation and has been proven to affect aquatic organisms negatively. READ MORE

  3. 2. Treatment of dissolved metals in highway runoff water : Pilot-scale trial with four reactive filter media and sand filter

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Serena Bianchi; [2021]
    Keywords : stormwater treatment; metal removal; adsorption; reactive filter media; sand filtration; Petrit-T; Polonite; D-Rainclean; Filtralite-P; de-icing salt; pressure drop; filter clogging; rening av dagvatten; avl ̈agsnande av metaller; adsorption; reaktiva filterme- dier; sandfiltrering; Petrit-T; Polonite; D-Rainclean; Filtralite-P; avisningssalt; tryckfall; filterstoppning;

    Abstract : The increasing highway traffic is leading to higher and higher levels of pollutants in the stormwater, such as suspended solids, metals, oils, nutrients and PAH. This runoff water causes the degradation of water bodies quality, leading to increased interest in the treatment of highway runoff for the removal of contaminants. READ MORE

  4. 3. Macroinvertebrate sampling in hydropeaking rivers : Testing Hester-Dendy samplers in a laboratory environment using different flow conditions

    University essay from Karlstads universitet/Avdelningen för biologi

    Author : Mattias Hansson; [2020]
    Keywords : hydropower; bioassessment; benthic macroinvertebrates; biotic indicator; vattenkraft; biologiska bedömningsgrunder; bentiska makroevertebrater; bioindikator;

    Abstract : Degraded rivers and streams caused by disturbances have created a need for reliable tools to assess the ecological status of such ecosystems. Numerous methods and programs have been developed to assess ecological status using biological indicators, benthic macroinvertebrates are the most commonly used biotic indicator. READ MORE

  5. 4. Metodik för bakteriologisk provtagning från näshålan på får

    University essay from SLU/Dept. of Clinical Sciences

    Author : Marta Fjällström; [2008]
    Keywords : får; bakteriologisk provtagning; nässvabb; skyddad provtagare; luftvägsinfektioner;

    Abstract : Respiratory infections are one of the major causes of disease in sheep throughout the world. In the beginning of 2008 the Swedish National Veterinary Institute and the Swedish Animal Health Service together started a project about respiratory infections in Swedish sheep. READ MORE

  6. 5. The effects of forest clear-cutting on stream water DOC

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Ida Dahl; [2008]
    Keywords : dissolved organic carbon; streams; water quality; clear cutting;

    Abstract : Dissolved organic carbon (DOC) is a dominant feature of water chemistry that strongly influences pH, buffering capacity, nutrient concentrations and bioavailability of metals and organic pollutants. This study of DOC concentrations in stream water was performed North West of Balsjö in northern Sweden. READ MORE