In this study remote sensing techniques have been used to quantify total suspended matter (TSM) in the red part of the electromagnetic spectrum. Data from NOAA-AVHRR are used to demonstrate the temporal change of the Glomma river in the northeastern part of the Skagerrak area, whereas LANDSAT-TM shows the detailed spatial coverage. The technique described […]
Författare
BERTIL HÅKANSSON
Nyckelord (Keyword)
riverplume, remote sensing, suspended matter.
Årgång
1989
Nummer
4
Utgåva
The present study shows that a substantial part of the pollutants transported in a river reach is deposited in the sediments (14-47 %). Especially a large part of the transported heavy metals copper, zinc and lead seem to be deposited (47 % for zinc). Mass-balance studies of different pollutants are verified by sediment samples. The […]
Författare
RONNY BERNDTSSON, and MIKAEL ERLSTRÖM
Nyckelord (Keyword)
water pollution transport, sedimentation, wash-out, heavy metals.
Årgång
1989
Nummer
4
Utgåva
This paper deals with ground water acidification and its effect on water supplies in rural areas. The aim was to find solutions to problems caused by ground water acidity. Applications and methods still under development on neutralization techniques adapted for individual use were studied. Insufficient research has been carried out on the necessary filtration systems. […]
Författare
PAIVI MÄKINEN, and ANNIKA SIPILÄ
Årgång
1989
Nummer
4
Utgåva
Due to aesthetical, organoleptic, health related as well as economical and practical reasons, humic substances constitutes a quality problem in drinking water. About 50 % of the Norwegian waterworks exceed the quality standards related to colour. A great effort has been made to find alternatives to the traditional way of humic substance removal, coagulation followed […]
Författare
BJØRNAR EIKEBROKK
Nyckelord (Keyword)
drinking water, humic substances, treatment processes, treatment costs, coagulation/direct filtration, ion exchange, membrane filtration, ozonation, GAC-adsorption.
Årgång
1989
Nummer
4
Utgåva
Water treatment in Denmark is generally based on unpolluted groundwater, where aeration and rapid sand filtration normally suffice. The growing threat of pollution has prompted the industry to investigate into advanced treatment processes. Some unpolluted groundwater resources are difficult to treat. Processes presently in use include stripping, chemical precipitation, biological nitrification, whereas chemical oxydation with […]
Författare
CHRISTIAN STAMER
Årgång
1989
Nummer
4
Utgåva
Yersinia enterocolitica og Campylobacter jejuni/Campylobacter coli er to enteropatogene bakterier som kan overføres med drikkevann. Y. enterocolitica og Y. enterocolitica-lignende bakterier er vanlige overalt i vårt miljø, i dyr, vann og matvarer. Den medisinske betydning er knyttet til noen få serotyper, i Skandinavia særlig serotype 0:3. Svinekjøttprodukter regnes for å være den viktigste smittekilden. Y. […]
Författare
GEORG KAPPERUD
Årgång
1989
Nummer
4
Utgåva