Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"GB Physical geography"”.
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Upper Ordovician and lowest Silurian graptolite biostratigraphy in southern Scotland
Abstract available p. [ix]-[xi]
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Palaeoenvironmental reconstruction and geoarchaeology of the Cuatro Cienegas Basin, NE Mexico, from the late Pleistocene to the present
With over 200 pools, lakes and rivers supporting over 70 species of endemic flora and fauna, the Cuatro Cienegas Basin, Coahuila, NE Mexico is an extremely important and extensively studied area in terms of conservation. The palaeoenvironment, however, is relatively understudied with only two …
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Modelling water and sediment chemistry in urban canals using chironomid pupal exuviae
This study has four principal aims. The first was to classify chironomid assemblages in canals using pupal exuviae. The second was to understand the distribution of species, their ecology and function. The third was to find indicator taxa which were suitable to classify canals in terms of water and …
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Cyclostratigraphy and sequence stratigraphy of the Solent Group (Eocene-Oligocene) of the Isle of Wight, UK
A stratigraphic reinterpretation of the Eocene-Oligocene Solent Group is presented here, based on the Whitecliff Bay section of the Isle of Wight, Hampshire Basin, UK. High resolution palaeontological, sedimentologica and mineralogical analyses allow the establishment of facies groups, which are …
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The performance of integrated groundwater treatment system in treating shallow groundwater in Parit Raja, Johor
Groundwater can be an alternative source to meet the demand for clean water supply. Unfortunately, lots of contaminant present in groundwater have made it unsafe for domestic use and drinking. Therefore, groundwater should be treated to an acceptable level before consumption. The overall aim of …
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A disaster risk assessment model for the conservation of cultural heritage sites in Melaka Malaysia
There exist ongoing efforts to reduce the exposure of Cultural Heritage Sites (CHSs) to Disaster Risk (DR). However, a complicated issue these efforts face is that of ‘estimation’ whereby no standardised unit exist for assessing the effects of Cultural Heritage (CH) exposed to DR as compared to …
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Downstream change in channel hydraulics along the River Severn, UK
An understanding of the longstream distribution of hydraulic processes is important for evaluating the mechanisms which control the catchment-scale variation of channel stability, sediment transport and siltation, flood generation and aquatic habitats. However, little attention has been given to …
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Ecology of acidification and recovery in Welsh upland streams
This study investigates the current impact of acid deposition on the structure and function of benthic communities in streams of contrasting pH in mid-Wales, UK, and examines barriers to biological recovery across the sites. The results of field surveys across 30 streams revealed sustained effects …
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The development of geomorphic and hydraulic complexity within streams and its influence on fish communities following glacial recession in Glacier Bay, Alaska
Studies of landscape development via primary successional processes are an important area of research for understanding how landscapes evolve into stable, diverse ecosystems. This research sought to assess how geomorphic and hydraulic complexity alter as streams develop following glacial recession. …
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Aspects of the Flandrian vegetational history of south-west Scotland, with special reference to possible Mesolithic impact
The potential factor of Mesolithic impact on the vegetation of south-west Scotland from c. 10 000 - 5000 b. p. was investigated by pollen and charcoal analysis of small peat-filled basins and blanket peat near to the sites of lithics and in the context of subsequent vegetational history (from c. …
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An investigation into the late Neolithic and Early Bronze Age round barrow monuments in the Wylye Valley, Wiltshire
This thesis examines the significance of funerary practices and monuments dating to the Late Neolithic and Early Bronze Age in and around the Wylye Valley to the west of Stonehenge. This has been conducted through the re-evaluation of the work of Sir Richard Colt Hoare and the production of a …
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Monuments, society and the Mesolithic-Neolithic transition, with particular reference to Cumbria and the northern Irish Sea region
This thesis argues that henges, stone circles and ring cairns form a 'spectrum' of monuments with origins in the earlier Neolithic. In that context it is suggested that some of the structures located beneath long cairns were originally free standing foci. How the monuments might reflect …
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An investigation into the effects of complex topography on particle dry deposition
There is a requirement to predict the spatial variation of particle dry deposition following a nuclear accident. The interaction of landscape features, atmospheric flow and particle dry deposition has been investigated with this in mind. Wind tunnel studies have been used with computational fluid …
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Seasonal hydrological prediction in Great Britain – an assessment
This thesis assesses seasonal hydrological prediction in Great Britain. Firstly, the study evaluates river flow prediction using climate model output to drive a rainfall-runoff model in the Dyfi basin, Wales. Results show that climate model precipitation can not skilfully simulate Dyfi discharge. …
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Organic matter fluorescence properties of some U.K. fresh and waste waters
Organic carbon is ubiquitous throughout the aquatic environment. It is an heterogeneous mixture of compounds, some of which are fluorescent, with allochthonous and autochthonous origins. The most common aquatic fluorophores are humic materials (peaks C and A) from degraded plant matter and …
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The use of Geographic Information System (GIS) for regional scale groundwater contamination risk assessment by chlorinated solvents in the Permo-Triassic sandstone aquifer
The long term contamination of groundwater resources by dense non-aqueous phase liquids (DNAPLs) such as chlorinated solvents is an increasing problem being faced throughout the industrialised world. The transport and eventual fate of these compounds in the subsurface is controlled by the nature of …
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The hydroecology of groundwater-fed streams in a glacierised catchment
Groundwater flow typically provides stable stream habitat within glacierised floodplains. However, spatio-temporal differences within and between groundwater flow pathways can create marked variability in the physicochemical characteristics of groundwater-fed streams. Research conducted on a …
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Geophysical, geochemical and arable crop responses to archaeological sites in the Upper Clyde Valley, Scotland
… considers the geochemical links between geophysical survey results from, and responses of barley crop growth to, the existence of plough-levelled archaeological sites. It takes as a starting point the results of magnetic and resistivity surveys undertaken at three sites in the Upper Clyde …
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