230 uppsatser · sida 1 av 16
The potential leakage of phosphorus from sediment in Lake Bornsjön, south western Stockholm
… the following year that showed an accumulation of phosphorus in the sediment of the deepest parts of the lake (Pettersson 1987). The purpose of the study was to investigate the present leakage of phosphorus from the sediment to the water column in Lake Bornsjön today and to …
The amount of various phosphorus (P) fractions in the sediment and the relationship between the amount of P and sediment particle size were investigated in a constructed wetland southwest of Linköping. Furthermore, the possible correlation between clay content in the sediment …
Kan den fungera som en källa till naturvetenskaplig kunskap?
The amount of various phosphorus (P) fractions in the sediment and the relationship between the amount of P and sediment particle size were investigated in a constructed wetland southwest of Linköping. Furthermore, the possible correlation between clay content in the sediment …
… by anthropogenic impacts at multiple scales. One aspect of human impact is sediment transport associated to the abundance of stream structures as large woody debris and the composition of the riparian zone from forest to agricultural landscapes. Riparian buffer zones and stream …
… control the solubility of Hg and the production of MeHg in a contaminated lake sediment. The lake Ala-Lombolo, Kiruna municipality, is well-known to be contaminated by mercury from different sources. Sediment cores were sampled at three different locations (N, SW and SE) in the …
På uppdrag av institutionen för geologiska vetenskaper Stockholms universitet
… from animals and vegetation have, over time, accumulated into thick layers of sediment. For researchers these layers of sediment contain valuable information about the earth’s past climate, information that can be used to predict future climate change and to estimate natural vs …
En studie av Librobäckens nedre delar och dess omland
… finns även andra faktorer som kan bidra till, eller förhindra, förluster av sediment via fluviala element i landskapet. Variationer i ett vattendrags omland påverkar hur den fluviala transporten av sediment ser ut. Syftet med den här studien är att kartlägga vilka faktorer som …
… with lower costs but relevant results. This thesis is investigating whether sediment sampling could be such an alternative. Sediment core samples were taken in four stormwater ponds where flow-weighted water sampling has been performed as well. This makes it possible to compare …
Bedömning av sulfidmalmgruvan Enåsens eventuella påverkan på sjöns vattenkvalitet
… 2005 showed high amounts of heavy metals in the lake. In this study water and sediments was analyzed to confirm the results from the 2005 study. Water was sampled two times during summer 2006 from the lake and adjoining streams. Sediment samples were collected with a core …
fallstudie av ett dike i Munktorps socken
… links between fields, lakes and oceans, having the potential to transport e.g. sediment and nutrients. When in a good condition, drainage ditches can act as sinks for e.g. phosphorus and sediments and prevent eutrophication downstream. The aim of this study was to determine the …
… chemical speciation and transformations of Hg and MeHg in bottom waters and sediments is followed in Ängessjön, a small lake located on the east coast in the middle of Sweden. The lake is not directly affected by any industrial pollution and concentrations of Hg in the sediment …
En fallstudie i fyra alsumpskogar p? svenska v?stkusten
… the potential carbon sequestering ability of alder swamps. Vegetation data and sediment samples were collected from a total of 37 sampling plots across four alder swamps in Bohusl?n on the Swedish west coast. The goal was to determine how plant diversity and the composition of …
… in this study were water depth, wave exposure, amount of epiphytes and sediment characteristics. An analysis of emerging seedlings from soil seed banks revealed a maximum density of 2200 seeds /m2 to 10 cm depth. A linear regression showed that the size of the seed bank was …
Avseende suspenderat material, PAH samt kvicksilver
Geotextildukar används idag som tillfällig kontroll av sedimentgrumling vid vattenarbeten. Syftet med examensarbetet är att ge ökad kunskap kring olika geotextildukars genomsläpplighet med avseende på suspenderat material, PAH (Polycykliska aromatiska kolväten) och kvicksilver …
… av den yttre miljön. Men än idag kvarstår stora problem med förorenade bottensediment. Huvuddelen av föroreningarna är oxiderat järn, sulfider, tungmetaller, karbonater och naturligt organiskt material. Vissa av dessa ämnen utgör allvarliga problem då de riskerar att spridas …
