69 uppsatser · sida 2 av 5
… Västmanland. In this area one of several company’s goals are to create ten new wetlands in their own forests as a part of cooperation with the Swedish bird society and Swedish wetland association. By establishment of an artificial wetland in an old beaver dam, Sveaskog wanted to …
… and causes eutrophication problems. For the best possible nutrient uptake, wetlands should be designed after local circumstances. One way is to construct production wetlands where biomass in form of plants is harvested to remove nutrients. In order to get the best possible …
Two ecological models of nitrogen processes in treatment wetlands have been evaluated and compared. These models have been implemented, simulated, and visualized in the Modelica language. The differences and similarities between the Modelica modeling environment used in this …
en förstudie på förväntad kväveavskiljning och lämplig växtlighet
… uneven streambed on the hyporheic water exchange and for trying to predict the wetlands nitrogen removal capacity. Proposed plants to support denitrification was different reeds such as Common reed (Phragmites australis), Bulrush (Typha), Reed Sweet-grass (Glyceria maxima) och …
växtgestaltning och planering
… The object of the thesis is to propose control and balance in urban wetlands, and discuss the difference a plant design can do. The thesis deals with discourses in the field of landscape architecture, biological diversity, dam construction, limnology, planting design and …
en fältstudie och utredning av behov i södra Sverige
… the 20th century a significant proportion (about 15 %) of the peat-covered wetlands in Sweden were drained to improve forest productivity. Area wise, most of the forest drainage was done in northern Sweden, but relatively speaking a larger part of the wetlands have been drained …
En pilotstudie vid Univates, Lajeado ? RS Brasilien
Treatment wetlands been showed efficient for reducing pollutant in waste water. In Lajeado ? RS, Brazil the landfill has poor leachate water treatment. It is necessary to supplement the treatment plant because they need to reduce BOD, COD and nitrate of the water going to …
… nature´s possibilities to take care of nitrogen through the draining of wetlands and straightening of rivers. In order to regain the potential of nitrogen retention in the water systems there now requires a reshape of the landscape we live in. A planned expansion of the mining …
Är våtmarker och dammar vägen framåt”
… the nutrient load from farming activities by means of different kinds of wetlands. By using the concept of the procedural landscape, introduced by Torsten Hägerstrand , together with historical maps with dates starting from the 17th century, the pre-modern landscape is analyzed …
påverkande faktorer och metodik för statistisk modellering
… water is currently treated by different methods such as wet ponds, constructed wetlands and filter strips. This study investigates these methods, which in earlier studies have shown to give varying results regarding their treatment efficiency. This thesis has been written on …
… due to a lack of preferred nesting habitat, such as shrub-lands or dense wetlands with Claudium spp. Such wetlands are often drained, resulting in encroachment of bushes and trees into the marshes. In such cases, Harriers usually abandon such areas, and as a consequence >90% of …
Höje å
… Demands of a more effective agriculture led to straightening and drainage of wetlands and watercourses. This had a large impact on Höje-å. More recently changes in the opposite direction can be seen. In 1990 an environmental project started which aimed to reduce high levels of …
… In addition to this the retention ofwater and nutrients in naturally occurring wetlands has decreased due to a reduction of wetlands in number andsize in the agricultural landscape. This increases nutrient levels in agricultural run-off and causes eutrophicationas well as …
… In addition to this the retention ofwater and nutrients in naturally occurring wetlands has decreased due to a reduction of wetlands in number andsize in the agricultural landscape. This increases nutrient levels in agricultural run-off and causes eutrophicationas well as …
… insects in open-land areas, beetles in dead wood and amphibians and mosses in wetlands and swamp forests.In order to locate suitable sites for reintroduction I hadthe national power line system (Stamnätet) in mind; this is unproductive land from an economic point of view. The …
