Browsing NIVA Open Access Archive by Title
Now showing items 5254-5273 of 8166
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Regionfelt Østlandet. Konsekvensutredning for temaet: Vann og grunn, inklusive dyreliv i vann
(NIVA-rapport;4447, Research report, 2001)Rapporten omhandler en statusbeskrivelse for vannkvalitet og vannlevende dyr i Regionfelt Østlandet. Dette inkluderer generell vannkjemi, tungmetaller i vann, moser, løsmasser, tålegrenser for surt vann, bunndyr, ... -
Regionskai i Eydehavn. Sluttdokumentasjon miljø
(NIVA-rapport;5738, Research report, 2009) -
Registrering av forurensningskilder og teoretisk beregning av forurensningstilførsler til Eikeren og Fiskumvatnet
(NIVA-rapport;0893, Research report, 1977)Registrering av forurensningskilder og beregning av forurensningstilførsler på grunnlag av avrenningskoeffisient. -
Regrowth of kelp after removal of sea urchins (Strongylocentrotus droebachiensis)
(NIVA-rapport;7431, Research report, 2019)With few natural predators, green sea urchins (Strongylocentrotus droebachiensis) have grown in numbers, grazed down large kelp forest areas in Northern Norway into urchin barrens. NIVA deployed three underwater cages ... -
Regulation impact on submerged macrophyte communities in some Norwegian lakes
(NIVA-rapport;1703, Research report, 1985)The results from a study of submerged macrophyte communities in regulated Norwegian lakes are summarized. Impact assessment is equivalenced to analysis of the vertical niche displacement, due to a fluctating water level. ... -
Regulering av Tronstadvatn. Vurdering av resipientforholdene i vassdraget fra Repstadvatn til sjøen. Redegjørelse til Kristiansand Byrett
(NIVA-rapport;0484, Research report, 1973)UNDERSØKELSE AV DE KJEMISKE FORHOLD I VASSDRAGET. ANALYSEDATA 74 0113 -
Reguleringsinnvirkninger på høyere vegetasjon i Mandalselvas nedre løp
(NIVA-rapport;0518, Research report, 1973)Vegetasjonsforhold i regulerte vassdrag. Observasjoner fra Mandalselva -
Reguleringsvirkninger i Numedalslågen ved Pikerfoss kraftverk og I/S Skollenborg kraftverk. Etterundersøkelse av begroingssamfunnet i 1985
(NIVA-rapport;1983, Research report, 1987)I forbindelse med bygging av Pikerfoss kraftverk og I/S Skollenborg kraftverk har NIVA gjordt etterundersøkelser av begroingssamfunnet i 1985. Observasjonene viser at vannkvaliteten ved Pikerfoss ikke er endret etter ... -
Rehabilitation of the DTD-Canal in Vrbas. Assessment of environmental status, pollution sources, and abatement measures
(NIVA-rapport;5061, Research report, 2005)During the years 2002-2006 there has been undertaken a Rehabilitation Plan Study of the Grand Canal on the problem stretch from Crvenka to the Triangle downstream Vrbas. The aim of the study has been to assess the environmental ... -
Rehabilitation Plan for Estero Salado, Guayaquil, Ecuador – Scoping phase
(NIVA-rapport;6361, Research report, 2012)The Municipality of Guayaquil invited the Norwegian Institute for Water Research (NIVA) and P. Geerders Consultancy (PGC) from Holland to participate in a two days field visit to the Estero Salado followed by a three days’ ... -
Rehabilitering av vannbehandlingsanlegg ved Østerbo Evangeliesenter. Fase 1: Utvikling av ny behandlingsprosess
(NIVA-rapport;5017, Research report, 2005)Det er gjennomført forsøk i pilotskala for å utrede ny behandlingsprosess for behandling av råvann fra Bunessjøen, Halden kommune. Råvannet er i utgangspunktet dårlig egnet som vannkilde med høy farge, lav pH og alkalitet, ... -
Reker i Indre Oslofjord - overvåking i perioden 2000-2014
(Journal article; Peer reviewed, 2016)Her presenteres resultatene av undersøkelser av forekomst av reker på 7 stasjoner i Indre Oslofjord og Drøbaksundet over en periode på 15 år. I alt ble det observert 15 ulike rekearter. Den mest hyppig observerte arten var ... -
Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?
(Peer reviewed; Journal article, 2021)Along six transects in each of six lakes across the Western Balkans, we collected data for three groups of littoral biological water quality indicators: epilithic diatoms, macrophytes, and benthic invertebrates. We assessed ... -
Relative impacts of multiple human stressors in estuaries and coastal waters in the North Sea–Baltic Sea transition zone
(Peer reviewed; Journal article, 2020)The objectives of this study are 1) to map the potential cumulative impacts of multiple human activities and stressors on the ecosystems in the transition zone between the North Sea and Baltic Sea, for Danish waters 2) to ... -
Release of chitobiase as an indicator of potential molting disruption in juvenile Daphnia magna exposed to the ecdysone receptor agonist 20-hydroxyecdysone
(Journal article; Peer reviewed, 2017)During arthropod molting, the old exoskeleton is degraded and recycled by the molting fluid. Chitobiase, a major chitinolytic enzyme in the molting fluid, has been widely used as a biomarker to indicate endocrine disruption ... -
Reliability in distribution modeling — A synthesis and step-by-step guidelines for improved practice
(Peer reviewed; Journal article, 2021)Information about the distribution of a study object (e.g., species or habitat) is essential in face of increasing pressure from land or sea use, and climate change. Distribution models are instrumental for acquiring such ... -
Remediation of sediments contaminated with drill cuttings - A review of field monitoring and experimental data for validation of the ERMS sediment module
(NIVA-rapport;5188, Research report, 2006)During the period 1989-2004 biodegradation of the organic phase of drill cuttings have been investigated in the mesocosm laboratory at Marine Research Station at Solbergstrand. In this report, cross-test calculations of ... -
Remote Sensing and the Vertical Distribution of the Chrysochromulina Polylepsis Bloom in the Skagerak in 1988
(NIVA-rapport;2666, Research report, 1991)The present study contributes to explain the development of the C. polylepsis bloom and to evaluatethe importance of combined use of in situ monitoring and remote sensing techniques. The results show the difficulties to ... -
Remote, autonomous real‑time monitoring of environmental DNA from commercial fish
(Peer reviewed; Journal article, 2020)Environmental DNA (eDNA) is increasingly used for monitoring marine organisms; however, offshore sampling and time lag from sampling to results remain problematic. In order to overcome these challenges a robotic sampler, ... -
Remots: Remote sensing techniques. Fjernmålingsmetoder for kartlegging av bunnhabitater - stus ved NIVA i 2004
(NIVA-rapport;5046, Research report, 2005)Målet for dette arbeid er å utvikle nye teknikker for kartlegging av marine bunnhabitater i våre kystområder. Disse kommer i tillegg til tradisjonelle, intensive metoder som registrering av flora og fauna ved dykking og ...