Sökning: "water-level fluctuation"

Hittade 4 avhandlingar innehållade orden water-level fluctuation.

1. 1. Impact of Water-Level Variations on Slope Stability

   Författare :Jens Johansson; Lars Johansson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

   Sammanfattning : Waterfront-soil slopes are exposed to water-level fluctuations originating from either natural sources, e.g. extreme weather and tides, or from human activities such as watercourse regulation for irrigation, freshwater provision, hydropower production etc. LÄS MER

3. 2. Population biology of the clonal plant Ranunculus lingua

   Författare :Mats E. Johansson; Christer Nilsson; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; clonal fragmentation; emergent macrophytes; fungal pathogens; hydrochoiy; invertebrate grazing; marginal population; Peronospora gigantea Prasocuris phellandrt regional abundance; rhizome production; size-number trade-off; vegetative reproduction; water-level fluctuation;

   Sammanfattning : The scope of this thesis was to identify, describe and quantify important life-history traits for the pseudoannual aquatic plant Ranunculus lingua in different ecological settings, by comparing populations from geographically marginal vs. central habitats. LÄS MER

4. 3. Spatially Distributed Hydrological Modelling : Wetness Derived from Digital Elevation Models to Estimate Peatland Carbon

   Författare :Abdulghani Hasan; Institutionen för naturgeografi och ekosystemvetenskap; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; modelling hydrology; Digital elevation models; LiDAR data; topographic wetness index; GIS; permafrost; Stordalen; peatland;

   Sammanfattning : To study the hydrology of peatlands and explore wetness distribution is difficultmainly due to the complexity of the surface of peatlands, and also due to the presence of permafrost underlain peatlands in the arctic regions. I have chosen the area called Stordalen mire in the arctic region in northern Sweden for my study. LÄS MER

5. 4. Våtmarkshistoria : Hjälmarens och Kvismarens stränder under 1800- och 1900-talen

   Författare :Jörgen Lennqvist; Thord Strömberg; Eva Jakobsson; Per Eliasson; Örebro universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; historia; vattenhistoria; miljöhistoria; våtmarkshistora; våtmark; sjösänkning; våtmarksrestaurering; landskap; landskapssystem; History; Historia; Historia; History;

   Sammanfattning : This thesis is a history of man’s and nature’s relationship, with regards to water. It is an environmental history about the changes in the wetland landscape around the Lakes Hjälmaren and Kvismaren in central Sweden during the 19th and 20th century. Hjälmaren, Sweden’s fourth-largest lake, was lowered between 1878 and 1888. LÄS MER