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… of models it has previously been possible to describe nutrient losses in a catchment area with a minimum unit of sub-catchment level. At present, it is instead desirable to model a smaller catchment with an opportunity to re-connect the results to the corresponding fields in the …
… km of watercourses and it’s an important structure in Swedish landscapes and catchments. In some of the watercourses lives spieces like the freshwater pearl mussel (Margaritifera margaritifera) and brown trout (Salmo trutta) which both are sensitive for inteference from the …
Är våtmarker och dammar vägen framåt”
… Union Water Framework Directive has affected the local water management in the catchment Märstaån situated in the eastern part of the lake Mälaren river basin, Sweden. The first part of the study gives an historical overview of the area with focus on how the old agricultural …
… for watershed management developed at IVL. The model simulates runoff from a catchment based on daily mean values of temperature and precipitation. The GIS input data consist of maps with soil type, land-use, lakes, rivers and a digital elevation model. The model is a hybrid …
undersökning av fosforhalter
… 3. Is the soil type the reason why the phosphorus level vary within the catchment? This was one of the first questions that came up when the project started. But due to lack of data, a local soil type map could not be done. It is therefore not possible to draw any conclusions …
… measures in Swedish lakes and streams. We focused our study on five catchments; Emån and Mörrumsån in southern Sweden and Lögdeälven, Sävarån and Umeälven in the northern Sweden. The results show that the geographic spread of restoration measures differed between the northern …
… quantify and map solute advective travel times and pollutant transport at the catchment scale. Such quantification and mapping can increase the understanding of catchment-scale pollutant transport in general and contribute to the identification of the main sources of water …
… leaching model. The aim was also to describe how water moves through the catchment toward the wetland. The catchment area is 98 hectares of which 82 % is drained through the inlet of the wetland. This 82 % represented 77 % of the total nitrogen load (per year) and 60 % of the …
comparisons of different laboratory methods as indices for phosphorus leaching to waters
… to estimate P losses, environmental monitoring of small agriculture-dominated catchments is being carried out in most of these countries. Evaluation of the risk of P leaching to waters is usually based on chemical tests originally developed to quantify the amount of soil P …
vilken information ger berggrundens överyta?
… areas as it is done today. It is further shown that the topographic sub-catchments from SVAR are not suitable for defining recharge areas for aquifers. This is partly because the areas of the sub-catchments are entirely dependent on which point they are defined from and these …
… can be used as a simple instrument to identify acid sulphate soils in the catchment. 31 coastal streams in the county of Västerbotten were analyzed for different catchment properties such as occurence of marine sediments and basic water chemistry including conductivity and …
… classified as 5, 25, 40 and 60 year based on data of the forest age in the catchment, gathered from the Swedish national forest inventory. Clear-cut lakes were classified as 5 years (>20% of the catchment clear-cut during the last 10 years). The results showed that DOC and total …
Topography is an important parameter for catchment hydrology, since it is a driver for water flow. Moreover, topography serves as a basis for hydrological models, e.g. ”Top-model”, which is based on a topographical wetness index (TWI). Few studies of TWI have been conducted on …
provtagning, analys och förslag till åtgärder
… analyses. The specific purposes were: (1) to collect samples within the catchment of the Rävlidmyran mine and to predict how the metal flows take place and to investigate whether sulphate reduction is important or not (2) to collect samples in the pit lake to get a picture of …
En jämförande studie av Västra Götalandsregionen och Norrbottens läns landsting
… to taxation right, which is high in the region and ensured by a strong catchment area. When the county council get lawful regional status, the abscense of a big catchment area will cause a weaker regional autonomy, caused to its dependence of both the territorially and sectorial …
