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Tesi sul tema "Rivers"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Simon, Ralph T. "Historic changes in the channel geometry and migration of the Susquehanna River from Conklin to Apalachin, New York, and their causes." Diss., Online access via UMI:, 2007.

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2

Hemert, A. J. "Making rivers modular emerging river science 1980-2005 /." Enschede : University of Twente [Host], 2008. http://doc.utwente.nl/60225.

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3

Steward, Alisha Louise. "When the River Runs Dry: The Ecology of Dry River Beds." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/366740.

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Temporary rivers and streams that naturally cease to flow can be found on every continent. Many others that were once perennial now also have temporary flow regimes due to the effects of water extraction or changes in land-use and climate, while others that used to run dry no longer do so due to water releases and waste water discharges. The dry beds of temporary rivers are an integral part of river landscapes and have: a role as seed and egg banks for aquatic biota; a unique diversity of aquatic, amphibious and terrestrial biota; a role as dispersal corridors; as temporal ecotones linking wet

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4

Serlet, Alyssa. "Biomorphodynamics of river bars in channelized, hydropower-regulated rivers." Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/368649.

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Over the past 200 years, rivers in industrialized countries have been significantly altered by human interventions such as channelization, hydropower development, and sediment mining causing observable biogeomorphological changes. In the European Alpine region, many large rivers have been impounded and channelized, yet few studies have conducted in-depth research on the temporal patterns of the causes and trajectories of these biogeomorphological responses, in comparison to rivers that can adjust their planform. Moreover, it is well-known that within channelized rivers alternating bars may app

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5

Serlet, Alyssa. "Biomorphodynamics of river bars in channelized, hydropower-regulated rivers." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/3528/1/Thesis_Alyssa_Serlet_final.pdf.

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Abstract (sommario):

Over the past 200 years, rivers in industrialized countries have been significantly altered by human interventions such as channelization, hydropower development, and sediment mining causing observable biogeomorphological changes. In the European Alpine region, many large rivers have been impounded and channelized, yet few studies have conducted in-depth research on the temporal patterns of the causes and trajectories of these biogeomorphological responses, in comparison to rivers that can adjust their planform. Moreover, it is well-known that within channelized rivers alternating bars may app

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6

Tellman, Barbara, Richard Yarde, and Mary G. Wallace. "Arizona's Changing Rivers: How People Have Affected the Rivers." Water Resources Research Center, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/326060.

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7

Kaless, Gabriel. "Stability analysis of gravel-bed rivers: comparison between natural rivers and disturbed rivers due to human activities." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3422602.

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The present research studies fluvial processes –water and sediment flows – that define the shape of an alluvial channel. The relationship between forms and processes is complex because they are interrelated: the channel shape influences the water flow which drives the sediments movement on the channel bed that modifies the channel form, closing a circle. Although, the objective of the work is a very old question in fluvial studies, to explain the shape of rivers in terms of external controls and internal processes, the problem has not been solved yet and this study provies new elements for its

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8

Moller, Lars Christian. "Sharing transboundary rivers." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/13124/.

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This thesis is a collection of three essays on the economics of transboundary river management (contained in chapters 2-4) the contents of which is outlined below: Chapter 2 examines the equity-efficiency trade-off on a transboundary river where an upstream and a downstream riparian withdraw irrigation water. Equity is defined as ‘equal sharing of waters’ - a notion consistent with egalitarianism and equality of opportunity. Property rights are undefined, a priori, but riparians can enter an equal quota cooperative agreement (with side payments and restricted trade in water quotas). We find th

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9

Hu, Yuanlong 1964. "On tropospheric rivers." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8058.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2002.<br>Page 231 blank.<br>Includes bibliographical references (p. 221-230).<br>In this thesis, we investigate atmospheric water vapor transport through a distinct synoptic phenomenon, namely, the Tropospheric River (TR), which is a local filamentary structure on a daily map of vertically integrated moisture flux. Firstly, an automated procedure for identifying and tracking these rivers (named TRICKS, i.e., the Tropospheric River Identifying and traCKing Scheme) is described and its pe

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10

Alam, Khorshed. "Cleanup of the Buriganga River: Integrating the environment into decision making." Thesis, Alam, Khorshed (2003) Cleanup of the Buriganga River: Integrating the environment into decision making. PhD thesis, Murdoch University, 2003. https://researchrepository.murdoch.edu.au/id/eprint/22/.

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This research attempts to fill in some specific gaps in the area of economic valuation of non-market goods and services with respect to development projects, and the integration of those values in the policy decision-making process. The concept and theory of non-market valuation and project appraisal are examined. In a developing country context, the conventional contingent valuation method is extended to include respondents' contribution in terms of time, irrespective of their decision to contribute money. This extension of the conventional contingent valuation method allows the inclusion of

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11

Alam, Khorshed. "Cleanup of the Buriganga River : integrating the environment into decision making /." Access via Murdoch University Digital Theses Project, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040820.120416.

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12

Carini, Giovannella, and n/a. "Effects of Contemporary and Historical Processes on Population Genetic Structure of Two Freshwater Species in Dryland River Systems (Western Queensland, Australia)." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050113.081250.

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Arid and semiarid river systems in Western Queensland, Australia, are characterized by the unpredictable and highly variable nature of their hydrological regimes as a result of the episodic nature of rain events in the region. These dryland rivers typically experience episodic floods and extremely low or no flow periods. During low or no flow periods, water persists only in relatively wide and deep sections of the river channels, which are called 'waterholes'. These isolated waterholes serve as refugia for aquatic species during protracted intervals between floods. In such discontinuous riveri

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13

Carini, Giovannella. "Effects of Contemporary and Historical Processes on Population Genetic Structure of Two Freshwater Species in Dryland River Systems (Western Queensland, Australia)." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367070.

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Abstract (sommario):

Arid and semiarid river systems in Western Queensland, Australia, are characterized by the unpredictable and highly variable nature of their hydrological regimes as a result of the episodic nature of rain events in the region. These dryland rivers typically experience episodic floods and extremely low or no flow periods. During low or no flow periods, water persists only in relatively wide and deep sections of the river channels, which are called 'waterholes'. These isolated waterholes serve as refugia for aquatic species during protracted intervals between floods. In such discontinuous riveri

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14

Luger, Michael Karl. "Environmentally-sensitive river management : assessment and mitigation of impacts on urban rivers." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/13886.

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Includes bibliographies.<br>Urban development and engineering works have resulted in the majority of rivers that drain urban areas being severely degraded, both ecologically and in terms of their potential amenity value. This dissertation explores the reasons for this "spiral of degradation" and it describes the ecological and social impacts on rivers caused by urban development, channelisation and canalisation. It then suggests possible measures to mitigate the impacts at the levels of the catchment, floodplain and river channel. The present cycle of degradation of urban rivers in the Cape Me

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15

Vaicenaviciene, Monika. "What Is a River? : A report about a picture book on rivers." Thesis, Konstfack, Grafisk design & illustration, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-5869.

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The thesis consist of two parts - a creative part and a written report.The creative part is a picture book about rivers and the plentiful connections they have with The creative part is a picture book about rivers and the plentiful connections they have with us humans. It follows a child and her grandma as they look for answers to a question – what is a river? In their imaginary expedition, they discover rivers flowing in the sky and in living organisms; meet pilgrims and conquistadores, magical shape-shifting river dolphins and older-than-dinosaurs species of sturgeons; fish and bathe; gather

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16

Empfield, Jeffrey Morgan. "Wilderness rivers : environmentalism, the wilderness movement, and river preservation during the 1960s /." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-03302010-020640/.

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17

Lucas, Damian. "Shifting currents : a history of rivers, control and change /." Electronic version, 2004. http://adt.lib.uts.edu.au/public/adt-NTSM20050331.183915/index.html.

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18

Dawson, Charles Robert Eliot. "Writing the memory of rivers : story, ecology and politics in some contemporary river writing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0020/NQ46337.pdf.

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19

Tait, Simon Joseph. "The physical processes of bed armouring in mixed grain sediment transport." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 1993. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59561.

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20

Doyle, Paul Norman. "The effects of human activities on stream water quality case studies in New Zealand and Germany : thesis submitted in partial fulfilment of the degree of Master of Applied Science, Earth and Oceanic Sciences Research Institute, Auckland University of Technology, Auckland, New Zealand, September 2005." Full thesis. Abstract, 2005.

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21

Burge, Leif M. "Dynamics of a transitional river pattern : a multi-scale investigation of controls on the wandering pattern of Miramichi rivers, New Brunswick, Canada." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84484.

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The wandering river pattern represents one of the last remaining river patterns that are not well understood. Many aspects of these rivers are not well known, particularly the processes of their creation and maintenance. The term wandering describes gravel or cobble bedded rivers, transitional between braided and meandering, with multiple channel sections around semi-permanent islands connected by single channel sections. This dissertation investigates the controls on the characteristics of wandering rivers within the Miramichi region of New Brunswick through time and at three nested sp

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22

Langham, Joseph Anthony. "Self organisation in braided systems : DEM analysis of the River Feshie, Scotland." Thesis, University of Hull, 2004. http://hydra.hull.ac.uk/resources/hull:8093.

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23

Dollar, E. S. J. "The determination of geomorphologically effective flows for selected eastern sea-Board Rivers in South Africa." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1005499.

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In South Africa the need to protect and manage the national water resource has led to the development of the Reserve as a basic right under the National Water Act (1998). The Ecological Reserve relates to the quality and quantity of water necessary to protect the sustainable functioning of aquatic ecosystems. The geomorphological contribution to setting the Reserve has focussed on three groups of information requirements: the spatial and temporal availability of habitat, the maintenance of substratum characteristics, and the maintenance of channel form. This thesis focusses on the second and t

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24

Hewitt, Jack. "Factors Controlling Mercury Concentration in Rivers in the Mackenzie River Basin, Northwestern Canada." Thesis, Uppsala universitet, Luft-, vatten- och landskapslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414036.

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Mercury (Hg) in rivers and streams of the Mackenzie River Basin (MRB) presents a risk to fish, aquatic mammals, and humans. This thesis makes use of newly-released water quality data, including total mercury (THg) and dissolved mercury (DHg), gathered through the NWT-Wide Community-based Water Quality Monitoring (CBM) program. Landscape metrics extracted from geospatial datasets (e.g. vegetation type cover and ground ice presence), along with the water quality parameters were transformed, as needed, and then assessed for relationships with Hg concentration in rivers using principle component a

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25

Parker, Stephanie Megan. "Effects of Natural Disturbance on Arctic Stream Communities." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/ParkerSM2004.pdf.

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26

Fung, Lai-kuen. "An Investigation of the stream water chemistry in a small drainage basin in Shek Kong, Hong Kong." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22288077.

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27

Carr, Genevieve Margaret. "Prediction of periphyton in rivers." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29083.

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Periphyton communities are often the dominant primary producers and an important energy source to higher trophic levels in rivers and streams. Empirical models of periphyton biomass (chlorophyll a) that have high predictive power are generally lacking. The goal of this research was to assess and improve the predictability of periphyton in rivers. A historical river monitoring data set from Alberta showed that, in general, land use in the drainage basin was a good surrogate for instream nutrient concentrations in regression models of periphyton biomass. Land use explained up to 34% of the varia

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28

Contant, Jacinthe. "Phytoplankton Communities in Temperate Rivers." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/20623.

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The structure of phytoplankton communities was examined seasonally across five rivers with a focus on small cells and their relative importance. Picophytoplankton (0.2-2 μm), previously considered insignificant in rivers, reached densities as high as those observed in lakes and oceans (~ 10e4-10e5 cells/mL). Their relative importance was not a function of trophic state with the highest contribution to algal biomass found in the most eutrophic river. Body size distributions were analyzed from both chlorophyll-a size fractions and taxonomic enumerations; no significant effect of river or season

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29

Green, Anthony P. E. "Geomorphological modelling of meandering rivers." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430480.

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30

Brewer, Paul A. "Sediment reduction processes in rivers." Thesis, Aberystwyth University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323787.

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31

Clark, Ezra. "Microthermal habitats in British rivers." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267237.

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32

McLaughlin, Seamus Pius. "Only Our Rivers Run Free." Digital Commons at Loyola Marymount University and Loyola Law School, 1986. https://digitalcommons.lmu.edu/etd/761.

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33

Rosado, Joana Isabel Caeiro Condeço. "Ecosystem functioning of temporary rivers." Doctoral thesis, Universidade de Évora, 2012. http://hdl.handle.net/10174/12178.

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O presente estudo abrange questões relevantes sobre o funcionamento de rios temporários. São abordados diferentes tópicos tais como a problemática da escassez de água particularmente na bacia Mediterrânica, a biodiversidade aquática e ripícola, a dinâmica de nutrientes e fatores fundamentais para a gestão e conservação de rios temporários Mediterrânicos. O principal objetivo é estudar alguns dos processos que ocorrem ao nível da bacia de drenagem e galeria ripícola associada, fazendo sempre a ligação dos resultados obtidos com a importância de uma correta gestão da bacia hidrográfica. Os resul

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34

Seddon, Emma L. "Characterising historic ecological conditions in lowland rivers : applying palaeoecological techniques to river restoration planning." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/14780.

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It is widely recognized that anthropogenic activities have resulted in significant changes to the ecology and hydromorphology of riverine ecosystems globally. Across much of lowland England a number of riverine habitats and the flora and fauna inhabiting them, have been lost or disadvantaged by historic channel modifications. Many of the most significant modifications took place in the decades following World War II, in a drive to increase food security through improved land drainage and associated flood management. A better understanding of the geomorphological, hydrological and biodiversity

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35

Gooch, Catherine. "“I’VE KNOWN RIVERS:” REPRESENTATIONS OF THE MISSISSIPPI RIVER IN AFRICAN AMERICAN LITERATURE AND CULTURE." UKnowledge, 2019. https://uknowledge.uky.edu/english_etds/97.

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My dissertation, titled “I’ve Known Rivers”: Representations of the Mississippi River in African American Literature and Culture, uncovers the impact of the Mississippi River as a powerful, recurring geographical feature in twentieth-century African American literature that conveys the consequences of capitalist expansion on the individual and communal lives of Black Americans. Recent scholarship on the Mississippi River theorizes the relationship between capitalism, geography, and slavery. Walter Johnson’s River of Dark Dreams: Slavery and Empire in the Cotton Kingdom, Sven Beckert’s Empire o

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36

Milner, Victoria S. "Assessing the performance of morphologically based river typing in Scotland using a geomorphological and ecological approach." Thesis, University of Stirling, 2010. http://hdl.handle.net/1893/2430.

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Traditionally, the interactions between geomorphic character and aquatic biodiversity have been widely acknowledged, but poorly quantified. However, the coupling of these disciplines is currently rising up legislative and political agendas, such as the European Union Water Framework Directive (EU WFD). The Directive requires Member States to classify rivers into types based on their natural morphology and geomorphic processes, and to link the biota to river types existing under natural conditions. Typing now forms the basis for evaluating environmental sensitivity to river engineering and dete

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37

Hattingh, Keaton Jade. "Geomorphological controls on pool formation and pool persistence in non-perennial river systems." University of the Western Cape, 2020. http://hdl.handle.net/11394/7739.

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>Magister Scientiae - MSc<br>Globally climate variability and anthropogenic effects are causing more perennial rivers to become non-perennial rivers. Non-perennial rivers are distinguished by their isolated pools which serve as refugia for aquatic organisms, water birds, and riparian vegetation. The literature on non-perennial rivers demonstrates that pools are poorly understood in terms of their location, nature, and geomorphic persistence. Therefore, this study examines the relationships between the spatial distribution, morphology, and substrate characteristics of pools in reaches of the Pr

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38

Parent, Alain Paul. "Scale models of gravel bed rivers." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28319.

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The combined studies of flow processes in a full size gravel-bed river and its associated small-scale model have demonstrated the applicability of the similitude concepts as well as the potential of scale models for quantitative research in fluvial geomor phology. This scaling investigation considered the comparison of velocity profiles, shear stress measurements, flow structure and surface bed material samples. An extension of the strict comparison on a detailed level of field and laboratory processes in a specific case consisted in the proposition of a "generic model" framework according to

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39

Hardenbicker, Paulin. "Phytoplankton dynamics in two large rivers:." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-147859.

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This study addresses the regulation of large river phytoplankton by climate-related drivers with the help of three different approaches, i.e. analyses of long-term data and spatial dynamics (longitudinal samplings) as well as mathematical modeling. The central hypothesis is that discharge has a dominant role among climate-related variables which strongly alters phytoplankton biomass development. A multi-factorial statistical analysis on the basis of long-term data (1990 – 2009; 1994 – 2009) from two measuring stations of the rivers Rhine and Elbe revealed that discharge conditions and light av

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40

Hubbard, Lisa Cheadle. "Flow processes in the mountain rivers." Thesis, Queen Mary, University of London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286540.

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41

Soar, Philip J. "Channel restoration design for meandering rivers." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324013.

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42

Kamal, Karima Mohamed Magdy Ahmed. "Externalities and agreements in international rivers." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400477.

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43

Yi, Robert Sngho. "Emergent geometries of groundwater-fed rivers." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113794.

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Thesis: Ph. D. in Geophysics, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 99-107).<br>Groundwater-fed rivers form stunning geometries over a range of scales. These rivers grow as water from an underground aquifer reemerges and erodes the overlying topography. Both the aquifer and the overlying topography generate flows along diffusive gradients. We study three features produced by these gradients over different scales: the shape of the valley that fo

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44

Wheeler, Kevin Guy. "Negotiated risk management of transboundary rivers." Thesis, University of Oxford, 2018. https://ora.ox.ac.uk/objects/uuid:334931a0-855d-45e4-ac84-652f52eef148.

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Reaching agreements over water management on transboundary rivers is a complex yet necessary endeavour to assure that humans can live within the limits of available resources. The myriad of challenges is both physical and social in nature; the uncertainty of water availability due to natural hydrologic variability is often increased by the involvement of multiple management institutions. Jurisdictions of control are typically defined by political borders, and thus they represent distinct geographic domains and interests. Increasing scarcity, driven by rapidly expanding populations and our grow

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45

Onogbosele, Cyril Oziegbe. "Bioavailability of organic contaminants in rivers." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/11050.

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In rivers, association of organic contaminants with dissolved organic carbon may limit freely dissolved or bioavailable fractions and toxicity of organic contaminants. Consequently, assessment of toxicity of organic contaminants on the basis of their total chemical concentrations may lead to overestimation of risks to organic contaminants. Therefore, to achieve reliable and accurate risks assessment for organic contaminants, determination of bioavailability is important. The influence of humic acid on the bioavailability of organic contaminants in rivers was studied, using three chemicals with

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46

Borin, Frida, and Melika Abedi. "Membrane Distillation When Rivers Run Dry." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232567.

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This thesis is a techno-economic analysis of five potential energy sources that can be used to drive a water purifying system called the WaterApp. The Product will be installed for a pilot project in Balasore in Odisha, India, which is the case which this study is based on. The prime focus of the techno-economic analysis is to get a broad look on the possible energy sources to provide a basis for further investigation on the implementation of the WaterApp. Today, the WaterApp is still under research and development at Scarab Development AB. The future goal is to commercialize the WaterApp and

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47

Black, Andrew Roger. "Seasonality of flooding in Scottish rivers." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/15201.

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The study considers the seasonal distribution of non-tidal peak flows on a large number of rivers draining varied catchments across Scotland and Northumberland. Peaks over threshold (POT) flood series from 156 gauging stations are used, and are subject to two quality control measures. Firstly, threshold values are standardised to give 45 peaks over a ten year period and secondly, records are adjusted to compensate for non-stationarity in the sampled data. The database assembled consists of 3458 station-years of record. A comprehensive description of the seasonal patterns found is presented, ba

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48

Wong, Wing-sze. "Water chemistry in the Kam Tin basin, natural and authropogenic influences." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38605843.

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49

Mallea, Amahia K. "Rivers running through an urban environmental history of the Kansas Cities and the Missouri River /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5889.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 13, 2006) Vita. Includes bibliographical references.

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Hayes, Johan Barnard. "Assessment of fish as bio-indicators of river health in rivers of the southwestern Cape." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52704.

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Thesis (MSc)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: In this study, the Fish Assemblage Integrity Index (FAll) was applied on three rivers within the southwestern Cape. This index uses fish as indicators of biological aquatic integrity and is based on indigenous species expected to be present in biological fish habitats. Fish integrity classes were calculated for each of the sites in the three rivers studied. Sites 2 and 4 within the Lourens River were rated as Class C, whereas sites 1 and 3 were rated as Class F and Class D respectively. Sites 1, 2 and 4 within the Palmi

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