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Facilitating a co-constructed learning environment for caregivers in social gerontology : applying the 'Ripples on a pond' model / Magdel FivazFivaz, Francina Magdalena January 2010 (has links)
Thesis (M.A. (Research Psychology))--North-West University, Potchefstroom Campus, 2010.
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Continuous simulation of groundwater use and effluent discharge in catfish (Ictalurus punctatus) ponds at five locations in the Southeast U.S.Triyono, Sugeng, January 2007 (has links)
Thesis (Ph.D.)--Mississippi State University. Department of Agricultural and Biological Engineering. / Title from title screen. Includes bibliographical references.
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[en] STUDY OF URANIUM TRANSPORT IN AN ARTIFICIAL POND / [pt] ESTUDO DO TRANSPORTE DE URÂNIO EM UMA LAGOA ARTIFICIALANA CRISTINA LOURENCO DA SILVA 04 February 2004 (has links)
[pt] Modelos ambientais são ferramentas importantes para a
avaliação de impactos, para o controle da poluição e para
medidas de remediação e de segurança em um Sistema de
Gerenciamento Ambiental. Esses modelos fornecem uma
estimativa do comportamento de algumas substâncias químicas
(contaminantes) nos compartimentos ambientais (água, ar,
solo e sedimento) em função das características físico-
químicas e de transporte dessas substâncias e de dados
ambientais. O estudo da transferência de substâncias
químicas entre os compartimentos ambientais e as
concentrações resultantes nesses compartimentos é um pré-
requisito indispensável para a avaliação da provável
exposição, de processos de acumulação e da toxicidade para
os organismos vivos, incluindo o homem. Nesse trabalho, o
contaminante de interesse é o urânio usado no ciclo do
combustível nuclear. Nesse caso, as águas superficiais
representam um importante caminho pelo qual o material
radioativo pode ser dispersado de uma instalação nuclear
para o meio ambiente e daí para o homem. O transporte do
urânio em uma lagoa artificial, que recebe os efluentes
tratados das Unidades de Fabricação de Pó e Pastilhas de
UO2 (Indústrias Nucleares do Brasil S.A. em Resende/RJ) foi
estudado. A partir de análises do urânio total no
sedimento da lagoa, por fluorimetria, de julho a dezembro
de 2002, o coeficiente de distribuição (KD) foi calculado.
O valor encontrado para KD confirma o caminho principal de
transporte do urânio para o sedimento. Com o auxílio de
dados meteorológicos, verificou-se que as menores
concentrações de urânio total no sedimento ocorreram
durante os meses de chuva. / [en] Environmental models are important tools for impact
evaluation, pollution control and remediation and safety
measures in an Environment Management System. These models
provide an estimate of the behavior of some chemicals
(contaminants) in the environmental compartments (water,
air, soil and sediment) as a function of the physical
chemical and transport characteristics of these substances
and of environmental data. The study of the contaminant
transfer among the environmental compartments and the
resulting concentrations in these compartments is an
essential prerequisite for assessing the likely exposition,
the accumulation processes and the toxicity for the living
organisms, including man. In this work, the contaminant of
interest is the uranium used in the nuclear fuel cycle. In
this case, the surface waters represent an important
pathway by which the radioactive material can be dispersed
from a nuclear installation to the environment and from
there to man. The uranium transport in an artificial pond,
that receives the treated effluents from the uranium dioxide
(UO2) powder and pellets plants (Indústrias Nucleares do
Brasil S.A. em Resende/RJ), was studied. From the analyses
of total uranium in the pond sediment, by fluorimetry, from
July to December of 2002, the distribution coefficient (KD)
was calculated. The value found for KD confirms the main
pathway for uranium transport to the sediment. With the aid
of meteorological data, it was observed that the lower
concentrations of total uranium in the sediment occurred
during the rainy months.
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Kvalita vody odtékající z rybníků v průběhu vypouštění a výlovu se zřetelem na bilanci fosforu a nerozpuštěných látek / Impact of fish pond harvest on water quality especially onFREIDINGER, Jan January 2016 (has links)
The topic of this thesis is the impact of fish pond harvest on water quality especially on concentration of suspended solids and phosphorous. Goal of the study is to contribute to ongoing discussion about carp aquaculture's role in fresh water pollution. Sampling was carried out in five carp ponds in the Třeboňsko Protected Landscape Area. Main monitored parameters were concentration of suspended solids and total phosphorous during pond drainage and fish harvest.Results of the study confirmed very negative impact of fish harvest on water quality in recipient water.
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Řešení protipovodňové ochrany v zemědělsky využívané krajině / Flood protection in agriculturally used landscapeNOVOTNÝ, Patrik January 2017 (has links)
The diploma thesis focuses on problematics connected to the flood and individual kinds of anti-flooding measures in agriculturally used landscape. Theoretical part of the thesis is devoted to the general description of flood problematic. It contains basic terms connected with floods, mentions causes and flood categories, and also the factors that influence it's progress. Thesis includes precautions and solutions of the anti-flood protection. In the practical part of the thesis is characterised chosen region with flood risk. Analysis of the present state includes field research. As a result of the discovered risks have been selected appropriate anti-flood measures for stated location.
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Vlastnictví vodních nádrží, jejich funkce a zohlednění vodních ploch v projektu komplexní pozemkové úpravyBLÁHOVÁ, Barbora January 2017 (has links)
This thesis focuses on the issue of water tanks especially in the aspect of their functions, maintenance, reconstruction, development and revitalization of tanks. It also deals with the application of reservoirs in agricultural landscape. This thesis contains a description and evaluation of the history and development of tanks in the selected location of South Bohemia, which is the catchment Mladějovický stream. Within the selected and interested area contains a estimate of the economic severity of reconstruction tanks.
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Vliv vodních ploch na návrh nového uspořádání pozemků ve vybraných pozemkových úpravách. / The influence of water areas on the proposal of a new land arrangement in selected land adjustment.JAROŠOVÁ, Kamila January 2013 (has links)
My thesis is focused on the influence of water areas on the proposal of a new land arrangement in land adjustment. I chose the cadastral area of Žár u Nových Hradů and Netřebice. I made the work by comparing maps of land cadastre, land register and comprehensive landscaping project, where I focused on the comparison of changes in arrangement and area of ponds and reservoirs with adjacent land and changes in ownership.
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DISTRIBUIÇÃO ESPAÇO-TEMPORAL DE COMUNIDADES DE GIRINOS (AMPHIBIA: ANURA) NO CERRADO SUL-MATO-GROSSENSE / SPATIO-TEMPORAL DISTRIBUTION OF TADPOLE COMMUNITIES (AMPHIBIA: ANURA) IN THE CERRADO OF MATO GROSSO DO SULAmarante, Débora Delevati do 25 February 2011 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / We studied species richness, abundance and spatial-temporal distribution of tadpole
communities in eight ponds in an area of Cerrado in the state of Mato Grosso do Sul, Brazil.
We carried out this study during a rainy season (October 2009 to March 2010). We
determined the spatial and temporal niche breadth by standardized Levins index, and we used
null models to explore the patterns of niche overlap. Additionally, we evaluated the influence
of environmental descriptors and spatial distribution of ponds on the studied communities
using redundancy analysis (RDA) applied to three phases of the rainy season (outset, middle
and the end). We recorded tadpoles of 18 species belonging to four families: Hylidae,
Leiuperidae, Leptodactylidae, and Microhylidae. Most species was considered specialist
regarding to spatial niche breadth a (BA <0.20), and generalist regarding the temporal niche
breadth (BA> 0.50). The spatial niche overlap did not differ from expected by chance, while
the temporal niche overlap was clearly not random. Niche overlap was negatively correlated
with ecomorphological guilds, even after removed the phylogenetic effects. This pattern
seems figure a mechanism to reduce the competitive pressure among ecologically similar
species. In relation to environmental and spatial components, these presented differential
influence and importance along the rainy season. In early season pond area and the percentage
of marginal vegetation up to 30 cm height were the descriptors related to community
organization. During the full rainy season, the percentage of marginal vegetation up to 40 cm
height, percentage of flat margin profile, pond depth, as well as two spatial co-variables
explained the spatial distribution of species, followed by pure environmental variables and by
pure spatial variables. At the end of rainy season no environmental or spatial and descriptor
was included in the model. The importance of environmental descriptors of spatial
components of spatially structured descriptors varied throughout the rainy season, indicating
that dynamic processes occurs along the time are responsible for the organization of the
studied communities. / Estudamos a riqueza, a abundância e a distribuição espaço-temporal de comunidades de
girinos em oito poças em uma área de cerrado no estado do Mato Grosso do Sul, Brasil. Nós
realizamos o presente estudo durante uma estação chuvosa (outubro de 2009 a março de
2010). Assim, determinamos a amplitude de nicho espacial e temporal, através do Índice de
Levins padronizado e utilizamos modelos nulos para explorar os padrões de sobreposição de
nicho. Adicionalmente, avaliamos influência de descritores ambientais e da distribuição
espacial das poças sobre as comunidades de girinos estudadas. Para tanto, utilizamos análises
de redundância (RDA), considerando três fases da estação chuvosa (início, meio e final).
Registramos girinos de 18 espécies, pertencentes a quatro famílias: Hylidae, Leiuperidae,
Leptodactylidae e Microhylidae. Em relação à amplitude de nicho espacial, a maioria das
espécies foi considerada especialista em relação à utilização das poças (BA < 0,20), enquanto
no nicho temporal a maioria foi considerada generalista (BA > 0,50). A sobreposição de nicho
espacial não diferiu do esperado ao acaso, enquanto a sobreposição de nicho temporal foi
claramente não aleatória. A sobreposição de nicho temporal apresentou correlação negativa
com as guildas ecomorfológicas, mesmo após retirado o efeito filogenético. Tal padrão pode
figurar um mecanismo de diminuição da pressão competitiva entre as espécies
ecologicamente similares. Em relação aos componentes ambientais e espaciais, estes tiveram
influência e importância diferenciadas ao longo da estação chuvosa. No início estação a área
das poças e a porcentagem de vegetação marginal com até 30 cm de altura, foram os
descritores relacionados à organização das comunidades. Durante a estação chuvosa plena, a
porcentagem da vegetação marginal com até 40 cm de altura, a porcentagem de margens
planas, a profundidade, bem como duas covariáveis espaciais explicaram a distribuição
espacial das espécies, seguida pelas variáveis ambientais puras e pelas variáveis espaciais
puras. Ao final da estação chuvosa nenhum descritor ambiental ou espacial foi incluído no
modelo. A importância dos descritores ambientais, do componente espacial e dos descritores
espacialmente estruturados variou ao longo da estação chuvosa, indicando que processos
dinâmicos ao longo do tempo são responsáveis pela organização das comunidades larvárias
estudadas.
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Efeito da radiação solar e pré-desinfecção na caracterização lipídica de biomassa cultivada em lagoas de alta taxa utilizando esgoto doméstico / Effect of solar radiation and pre-disinfection in lipid characterization of high rate pond biomass grown in domestic sewageAssemany, Paula Peixoto 26 February 2013 (has links)
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Previous issue date: 2013-02-26 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Microalgae are currently considered to be one of the most promising alternative sources for biodiesel production. Variations in growing conditions, combined with the cultivation in wastewater are usually employed in order to maximize lipids accumulation at a relatively low cost. The aim of this study was to investigate the influence of different light intensities and ultraviolet predisinfection system in the lipid characterization of microalgae cultivated in high rate ponds, using wastewater as growing medium. Twelve high rate algal ponds were operated in parallel. Six of them received UASB effluent, and the others six had as growth medium UASB effluent that had previously passed through an ultraviolet pre-disinfection system. The units were also covered with shade screens for blocking 9, 18, 30 and 60% of solar radiation. The results showed that Chlorella and Desmodesmus were the dominant genera in all units. The total lipid content did not vary significantly among the units; the medium value was 9.5%. Units with higher solar radiation blocking were the ones that least accumulated lipids. Besides photosynthetically active radiation measured in the air (PAR), the variables subaquatic PAR, VSS concentration and chlorophyll-a concentration were the ones that best explained lipid accumulation. In terms of lipid productivity, the unit with more shadow and without the pre-disinfection system was the most productive, with mean value of 1.21 g. m-2.d-1. The lipid profile had a predominance of C16, C18:1 e C18:3 acids. The condition with 60% shade and without the pre-disinfection system was the one that combined the best lipids characteristics, qualitative and quantitative, for biodiesel production. / Microalgas são, atualmente, consideradas como uma das mais promissoras fontes alternativas para a produção de biodiesel. Variações nas condições de cultivo, aliadas ao cultivo em águas residuárias, são usualmente empregadas, visando maximizar o acúmulo de lipídeos a um custo relativamente baixo. Esse estudo objetivou investigar a influência de diferentes intensidades luminosas e da prédesinfecção por radiação ultravioleta na caracterização lipídica de microalgas cultivadas em lagoas de alta taxa, utilizando esgoto doméstico como meio de cultivo. Foram operadas em paralelo doze lagoas de alta taxa. Uma linha era composta de seis lagoas que receberam efluentes domésticos diretamente do reator UASB, e a outra linha de seis lagoas que tiveram como meio de cultivo efluente doméstico do UASB que passou por processo prévio de desinfecção ultravioleta. As unidades foram ainda cobertas com telas de sombreamento para o bloqueio de 9, 18, 30, 60 e 80% da radiação solar. Os resultados mostraram que os gêneros Chlorella e Desmodesmus foram os dominantes em todas as unidades. O teor de lipídeos totais não variou significativamente entre as unidades, ficando em torno de 9,5%. As unidades com maior bloqueio da radiação solar foram as que menos acumularam lipídeos. Além da radiação solar fotossinteticamente ativa medida no ar (PAR), as variáveis PAR subaquática, concentração de SSV e de clorofila a explicaram o acúmulo de lipídeos. Em termos de produtividade lipídica, a unidade com maior sombreamento e sem a pré-desinfecção UV foi a mais produtiva, com valor médio de 1,21 g. m-2.d-1. O perfil lipídico teve maior predominância dos ácidos graxos C16, C18:1 e C18:3. De forma geral, a condição com 60% de sombra e sem a pré-desinfecção UV, foi a que aliou as melhores características, em termos de quantidade e qualidade, dos lipídeos acumulados para produção de biodiesel.
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Floristický průzkum části povodí řeky Oslavy mezi obcemi Velké Meziříčí a Vaneč / Floristic research of part of catchment area of Oslava river between villages Velke Mezirici and VanecBORŮVKOVÁ, Zuzana January 2008 (has links)
The study deals with a description of vegetation of part of catchment area of Oslava river between villages Velke Mezirici and Vanec. The search had been realised during the vegetation seasons of the years 2006 and 2007. There are characterised geological-petrographical, soil, climatic, hydrographic ratios and basic phytogeographical characteristics of this area in the form of a search. Selected genera of the observed plants was characterised and their incidence is figured in the schematic maps of the area. There were found out 327 kinds of plants there. In the annex there are attached schematic maps with places of occurence of the plant genera and photographic documentation.
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