Browsing by Subject "valunta"
Now showing items 1-20 of 31
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(Vesihallitus, 1971)Vesientutkimuslaitoksen julkaisuja 1
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(National Board of Waters and the Environment. Vesi- ja ympäristöhallitus, 1994)Publications of the Water and Environment Research Institute. 17Yhteenveto: Viljelymenetelmien vaikutus eroosioon ja ravinteiden huuhtoutumiseen
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(Finnish Environment Institute, 2012)The Finnish Environment 6/2012In most countries of the Baltic Sea region monitoring systems are in place to provide information on agricultural impacts on surface and soil/ground water quality on different levels, i.e. plot, field, small catchment and larger rivers scale. Unfortunately, the spatial and temporal coverage of monitoring sites is rather varying. Moreover, transparency of the data is not always sufficient and it can be difficult to draw a clear picture on what is actually described by the provided data. Therefore, comparison of monitoring results can be restricted. The developed guidelines attempt to find answers to these questions by highlighting the strengths, gaps and weaknesses in the assessments of the results of monitoring on different scales. The guidelines include also a list of conclusions and recommendations to further improve the existing procedures and methodologies for surface and soil water quality monitoring in agriculture-dominated areas.
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(Elsevier, 2022)Science of the total environmentUrban hydrology is characterized by increased runoff and various pollutant sources. We studied the spatio-temporal patterns of stormwater metal (Al, V, Cr, Mn, Fe, Cu, Zn, and Pb) concentrations and loads in five urbanized and one rural catchment in Southern Finland. The two-year continuous monitoring revealed a non-linear seasonal relationship between catchment urban intensity and metal export. For runoff, seasonal variation decreased with increasing imperviousness. The most urbanized catchments experienced greatest temporal variation in metal concentrations: the annual Cu and Zn loads in most of the studied urbanized catchments were up to 86 times higher compared to the rural site, whereas Fe loads in the urbanized catchments were only circa 29% of the rural load. Total metal levels were highest in the winter, whereas the winter peak of dissolved metal concentrations was less pronounced. The collection of catchment characteristics explained well the total metal concentrations, whereas for the dissolved concentrations the explanatory power was weaker. Our catchment-scale analysis revealed a mosaic of mainly diffuse pollutant sources and calls for catchment-scale management designs. As urban metal export occurred across seasons, solutions that operate also in cold conditions are needed. Highlights • Impact of urban land use on metal export was studied by monitoring six catchments. • Continuous monitoring, automatic sampling and statistical modelling were performed. • Urban intensity increased seasonality in concentrations, especially for Zn and Cu. • Highest total metal load occurred in winter; seasonality in dissolved metals was modest.
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(Finnish Environment Institute, 1996)Monographs of the Boreal Environment Research 1
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(Vesihallitus. National Board of Waters, 1983)Vesientutkimuslaitoksen julkaisuja 50, 3-28Aluetekijöiden vaikutus pienten alueiden ylivalumiin
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(Vesihallitus, 1982)Vesientutkimuslaitoksen julkaisuja 27Tiivistelmä: Havaintotiheyden vaikutus valumavesien laatuarvioihin
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(Vesihallitus. National Board of Waters, 1981)Vesientutkimuslaitoksen julkaisuja 43, 32-47Salaojituksen vaikutuksista veden määrään ja laatuun Suomessa
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(Vesihallitus, 1977)Vesientutkimuslaitoksen julkaisuja 24Summary: On the hydrometeorological factors affecting irrigation
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(Vesihallitus. National Board of Waters, 1981)Vesientutkimuslaitoksen julkaisuja 43, 3-14Metsäojituksen pitkäaikaisista vaikutuksista suon hydrologiaan Suomessa
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(Vesihallitus, 1973)Vesihallitus. Tiedotus 46English summary: On snowmelt and water balance during snowmelt period in Pääjärvi representative basin in 1970-72
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(Vesihallitus, 1971)Vesientutkimuslaitoksen julkaisuja 2
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(Suomen metsätieteellinen seura, 1974)
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(Vesihallitus. National Board of Waters, 1982)Vesientutkimuslaitoksen julkaisuja 48
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(Vesihallitus. National Board of Waters, 1981)Vesientutkimuslaitoksen julkaisuja 42, 123-190Taajama-alueiden hulevesien laatu
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(Vesihallitus. National Board of Waters, 1981)Vesientutkimuslaitoksen julkaisuja 42, 3-39
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(Vesihallitus, 1973)Vesihallitus. Tiedotus 53English summary: On irrigation in Southwestern Finland
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(Suomen metsätieteellinen seura, 1942)
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(Vesihallitus. National Board of Waters, 1983)Vesientutkimuslaitoksen julkaisuja 51Pienet valuma-alueet tieteellisen ja sovelletun hydrologian tutkimusvälineenä
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(Vesihallitus. National Board of Waters, 1984)Vesientutkimuslaitoksen julkaisuja 55Lumipeitteen kertyminen ja sulaminen Suomessa
