• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 188
  • 57
  • 18
  • 15
  • 14
  • 10
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 6
  • 4
  • Tagged with
  • 423
  • 68
  • 64
  • 61
  • 57
  • 52
  • 44
  • 41
  • 39
  • 35
  • 34
  • 33
  • 30
  • 28
  • 27
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
381

Measuring the impact of crop production on household food security in KwaZulu-Natal using the coping strategies index (CSI)

Ngidi, Mjabuliseni Simon C. January 2007 (has links)
Crop production is widely promoted as a solution to food insecurity, but its real impact on household food security has not been measured in South Africa. Small-scale production is a common practice for many rural poor households of South Africa. While agriculture may play a major role in reducing food insecurity, agricultural growth alone cannot solve the problem of food insecurity at household level. South Africa is food secure at the national level, but available data suggest that between 58.5 and 73 percent of South African households experience food insecurity. This study set out to measure the impact of crop production on household food security among sampled households in two communal regions, Umbumbulu and Maphephetheni, of KwaZulu-Natal, to establish whether participation in food production improved household food security. Household surveys which explored the types of crops produced, food consumed, income obtained from crop sales and the food security situation, were carried out at Umbumbulu and Maphephetheni respectively (n = 200 and n = 68). The types of crops produced were investigated using crop production seasonality charts, while the household food security situation was measured using the Coping Strategy Index tool. The main findings of the study indicated that household gardens provided food for household members, but did not provide sufficient quantities to meet year-round consumption requirements. Most sampled households relied largely on purchased foods. More than 80% of the food consumed by households came from purchases, 4% and 13% came from own production in Umbumbulu and Maphephetheni respectively. Among the households surveyed, 58% and 89% were below the poverty line for Umbumbulu and Maphephetheni respectively. Umbumbulu and Maphephetheni’s largest household income contributions came from wages or salaries. Social grants were the second most important source of household income. As participation in crop production alleviated food shortages somewhat, its contribution to food security cannot be ignored. A study needs to be conducted to investigate whether participation in both farm/non farm activities reduces the number of households below the poverty line. Government should provide extension officers to monitor and evaluate the impact of gardens on household food security. To guide the design and implementation of commercial and home gardens, households need to develop clear and consistent policies, strategies, processes and procedures, and (a sound) monitoring and evaluation framework. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.
382

An evaluation of the perceived benefits and constraints of community gardens established by the KwaZulu-Natal Department of Agriculture and Environmental Affairs.

Thamsanqa Philangenkosi. January 2008 (has links)
This study provides feedback from the Extension Officers and community garden members involved in community garden projects of the KwaZulu-Natal Department of Agriculture and Environmental Affairs, by investigating the contribution of community gardens to household food security. The investigation included interviews with 61 Extension Officers from the Bergville, Hlanganani, Eshowe, Vryheid and Mbumbulu districts and 106 community garden members from 31 community gardens in the Bergville and Hlanganani districts. It was found that the people involved in community gardens were older persons, with little or no education. Those involved in community gardens were unemployed and relied on pensions, remittances and selling handicrafts to purchase garden inputs. The average household dependency ratios were 4, 5 and 5, 5 persons per active household member in Hlanganani and Bergville, respectively. Community garden members were mostly females, but most community garden members’ households were male-headed. The community garden members indicated that the most important reason for producing vegetables was for household use. Extension Officers were not satisfied with the state of community gardens and the relationship between the regional and district offices. Community gardens do not reflect the effort put in by the Extension Officers. The Extension Officers want to be involved in determining research priorities and be regularly informed about research findings and policy changes made at the regional level. The Extension Officers would like to see all government departments working together towards the development of communities. Extension Officers believe that if the government departments pool their resources, they would be able to serve the communities better than when each department works alone on community garden projects in the same community. Despite the initial funding of community gardens by the KwaZulu-Natal Department of Agriculture and Environmental Affairs, there were many factors limiting production of vegetables in community gardens. The limiting factors included poor soil fertility; small garden plot sizes; low water availability; high start-up costs and poor management of the community garden finances. The community garden members were positive about the contribution of community gardens to their lives. The benefits were in the form of information about vegetable production, cropping practices and the availability of fresh vegetables that provided nutritious food and allowed them to buy other household requirements instead of vegetables. Community garden projects have a potential role to play in the lives of many rural people if the following concerns raised by the Extension Officers are addressed: the relationship between the offices at district level and the regional level improves; the establishment and maintenance of sound channels of communication between the district field staff and the regions; research support is received from the regions; and government departments work together. The KwaZulu-Natal Department of Agriculture and Environmental Affairs should not only focus on providing infrastructure for projects but should also ascertain that the proposed project achieves the objectives of both the community garden members and the Department of Agriculture and Environmental Affairs and that the beneficiaries are trained before the project is handed over. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2008.
383

Who manages home garden agrobiodiversity? : patterns of species distribution, planting material flow and knowledge transmission along the Corrientes River of the Peruvian Amazon

Perrault-Archambault, Mathilde January 2005 (has links)
Agrobiodiversity constitutes an essential resource for traditional rural populations. Home gardens are "hotspots" of agrobiodiversity and important loci of in situ conservation efforts. This study seeks to understand the factors affecting gardeners' choices and to assess the accessibility of planting material in rural communities of the Peruvian Amazon. Household surveys and garden inventories conducted in 15 villages of the Corrientes river (n = 300), and case studies in three of these villages (n = 89), allowed to describe the local and regional patterns of garden agrobiodiversity and the structure of planting material exchange networks. Analyses reveal a strong link between species diversity and both household cultural and socioeconomic characteristics, and village ethnicity and size. Planting material flows primarily through matrilineal bonds, from advice-givers to advice-seekers, from old to young and from rich to poor. Farmers with exceptional species diversity, propensity to give and/or expertise are identified and their role in the conservation of cultivated plants is assessed. Expertise is not found to be as closely related to high species diversity as expected, but knowledge and planting stock dissemination go hand-in-hand.
384

Community responses to environmental education initiatives

Simelane, Delisile Zinhle 31 December 2006 (has links)
This qualitative case study concerns the educational processes undertaken in an environmental programme of Timeleni Bomake group at Nsingweni, a rural community in Swaziland. At the time of the research most of the group members were elderly women with about four men among whom is the facilitator, a teacher at Nsingweni Primary School. The inquiry occurred through fieldwork involving interviews, observation and photography. Data analysis followed an inductive process that builds concepts. Formed in 1990, the group saw dramatic economic gain in the 1990's through a gardening project supported by Yonge Nawe environmental action group and the facilitator. At the beginning of the new millennium the participants' intrinsic abilities to sustain the group were put to test. Challenges emerged that reduced the enthusiasm of some group members such that the study found the group at the edge of collapse. This report concludes with recommendations on ways to sustain community programmes. / Educational Studies / Thesis (M. Ed. (Environmental Education))
385

Food gardens, environmental lesson planning and active learning in the life orientation learning area - foundation phase: a case study at Lungelolethu Lower and Higher Primary School

Ncula, Ntombizandile Shirley January 2007 (has links)
This study was conducted at Lungelolethu Lower/Higher Primary School in Keiskammahoek at a time when I was struggling to understand and implement the new South African curriculum policy, particularly in the Foundation Phase Life Skills Learning Programme. The research focused on my developing an understanding of key Learning Outcomes and linking them with the National Curriculum Statement principle of social justice, human rights, a healthy environment and inclusivity. During this time I was the key 4-H Programme educator in my school, responsible for school food garden activities. I used the school food garden for this study to explore the opportunities the garden might provide to develop the new curriculum using active learning approaches to teaching and learning; as well as to respond to environmental issues such as poverty. This research was an interpretive case study which supported my reflections within a practical action research framework. This framework suited my intention to change my classroom practice. I undertook three action research cycles with the first cycle aimed at gaining insights from the 4-H Programme teachers which informed 2 lesson plans for cycles 2 and 3 respectively. I generated data through focus group interviews, observations, document analysis, video and tape recording, and my research journal entries. The data indicated the value of school food gardens in meeting curriculum requirements, particularly in relation to learner centred ideologies and the first principle of the national curriculum. As both researcher and mediator of learning, I developed skills and knowledge that helped me to understand working in the Foundation Phase. The study also revealed a need for meaningful integration within and across Learning Areas when planning lessons in the Life Skills Learning Programme. The study indicated that there is a need to develop assessment practices beyond a technical exercise to a more interpretive approach. Lastly this study offers some recommendations for further research into the use of school food gardens through taking the context of learners into account and by encouraging school community relationships that will also contribute in poverty alleviation.
386

Curriculum recontextualising using gardens for the health promotion in the life orientation learning area of the senior phase

Jenkins, Msawenkosi Wiseman January 2008 (has links)
With a view to understanding how curriculum is interpreted at classroom practice level, the study examined three stories of how the environmental discourse of the National Curriculum Statements (R-9) was recontextualised using school gardens in the Life Orientation Learning Area for the Senior Phase. To understand how the curriculum is recontextualised, I used Bernstein's theory of recontexutalisation where he explained how official pedagogic discourse (OPD) (in this case the environmental discourse is first delocated once it is transferred from the field of production (FOP) and relocated in the recontextualising field (where teacher educators and departmental officials mediate the discourse) and in the field of reproduction (FOR) which is the classroom and school. Bernstein explained that as the discourse is delocated and relocated it undergoes transformation. This transformation is influenced by practitioners' prior-knowledge, experience, culture and beliefs and other factors. To understand how transformation of the environmental discourse takes place, Bernstein's conceptual constructs of selective appropriation and ideological transformation were applied to an interpretation of three lesson processes, to explain how the discourse was changed. Each lesson was reviewed in terms of the selective appropriations and ideological transformations which took place. All three of the lessons observed took place in one school, and as such the study is designed as an interpretive case study where I have tried to make meaning from a rich, thick description of a specific case context. The school is located in Bizana, one of the villages in the O.R. Tambo District Municipality in the Eastern Cape Province,, and is currently in the process of implementing South Africa’s new National Curriculum Statement (NCS) like all other schools in South Africa. In conducting the research I observed lessons, interviewed the learners and teachers, and a community member and the manager of the SANBI greening project, and I also analysed documents which included the NCS for Life Orientation, and teachers planning documents and learners work produced in the lessons. I started the study by conducting a document analysis of the NCS, through which I identified dimensions of the Official Pedagogic Discourse. This was used as a framework to review the lessons to understand how the OPD was being recontextualised. The study concludes by discussing the key findings of the study in the form of a set of analytical statements. Some of the findings indicate that teachers have not been given adequate training for understanding and implementing the NCS which affects the recontextualisation process. The study shows that there is a dire need for professional development if the OPD is to be interpreted adequately by teachers so that its implementation at the meso and micro- levels becomes clear and effective.
387

Effect of agronomic management on growth and yield of selected leafy vegetables

Maseko, Innocent 06 1900 (has links)
African leafy vegetables have been shown and suggested to have potential to contribute to human diets and alleviate malnutrition; however, their levels of utilisation are currently low especially in South Africa. This is because there is limited access to these crops due to low availability in the market. Limited access is attributed, in part, to the lack of commercialisation as a result of limited agronomic information describing optimum management options for these leafy vegetables. Availability of such information would contribute to successful commercialisation of these crops. The primary objective of this study was to establish optimum agronomic management factors for Amaranthus cruentus, Corchorus olitorius, Vigna unguiculata and Brassica juncea for irrigated commercial production in South Africa. Seeds of Amaranthus cruentus, Corchorus olitorius were obtained from the Agricultural Research Council seed bank; Vigna unguiculata were obtained from Hydrotech and Brassica juncea seeds were obtained from Stark Ayres. The project consisted of three field studies whose overall objective was to evaluate growth and yield responses of the selected African leafy vegetables to agronomic factors under irrigated commercial production. These field studies comprised of two single factors; summer trials (planting density and nitrogen on three selected crops) and a combined winter trial (nitrogen, irrigation, plant density and planting date on a winter crop). Chapter three (3) investigated the effect of plant density on growth, physiology and yield responses of Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata to three plant densities under drip irrigated commercial production. The plant density levels of 100 000, 66 666 and 50 000 plants/ha were used in the 2011/12 and 2012/13 summer seasons. Parameters measured included chlorophyll content index (CCI), chlorophyll fluorescence (CF), stomatal conductance (SC), leaf number, leaf area index (LAI) and biomass. Amaranthus cruentus and Corchorus olitorius showed better leaf quality at lower plant density of 50 000 plants ha-1 than at 66 666 plants ha-1 and 100 000 plants ha-1. These results are based on bigger leaves expressed as leaf area index (LAI), better colour expressed as chlorophyll (CCI) and higher biomass per plant observed in these crops at 50 000 plants ha-1 in comparison to 66 666 plants ha-1 and 100 000 plants ha-1. In Vigna unguiculata there were no responses observed in LAI and CCI. In Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata fresh and dry mass yield of leaves were higher at 100 000 plants ha-1 compared to other treatments. In A. cruentus and C. olitorius, higher leaf quality parameters (CCI, plant height, leaf number, biomass per plant and LAI) indicated that these crops can perform better at lower densities of 50 000 than at 66 666 plants ha-1 and 100 000 plants ha-1 Therefore, using 50 000 plants ha- 1 is suitable for commercial production of A. cruentus and C. olitorius. In Vigna unguiculata, a plant density of 100 000 plants ha-1 produced the highest fresh and dry mass per unit area without compromising quality in terms of the leaf size (LAI) and colour (CCI). Therefore 100 000 plants ha-1 is a density recommended for commercial production in V. unguiculata.Chapter four (4) was conducted to investigate growth, physiology and yield responses of A. cruentus, C. olitorius and V unguiculata to nitrogen application under drip irrigated commercial production. Three nitrogen treatments levels were used viz. 0, 44 and 88 kg N ha- 1 in 2011/12 season and four nitrogen treatments levels viz. 0, 50, 100 and 125 kg N ha-1 were used in 2012/13 summer season. The nitrogen levels selected for each season were based on recommendations for Amaranthaceae species, Swiss chard (Beta vulgaris L.var cicla) derived from soil analysis of the trial (field) site. Parameters measured included chlorophyll content index (CCI), chlorophyll fluorescence (CF), stomatal conductance (SC), leaf number, leaf area index (LAI) and biomass. Results showed that application of nitrogen at 44 kg N ha- 1 in 2011/12 summer season and 100 kg N ha-1 in 2012/13 summer season improved LAI, CCI, biomass per plants and yield in A. cruentus. A similar trend was observed in C. olitorius except that 44 kg N ha-1 improved stem fresh yield. Further increase in nitrogen fertiliser above 44 kg N ha-1 during the 2011/12 season and above 100 kg N ha-1 in 2012/13 summer season reduced leaf quality and yield in both crops. In V. unguiculata, nitrogen application showed a slight increase in yield values from 0 to 44 kg N ha-1 followed by decrease at 88 kg N ha-1 in 2011/12 summer season; however, this increase in yield was not significant. During the 2012/13 summer season, yield in terms of fresh weight was significantly (P<.001) reduced by applying nitrogen at various levels. However, leaf dry matter content increased significantly (P<.001) with increase in nitrogen from 0 kg up to 100 kg N ha-1, then remained unchanged at 125 kg N ha-1. Therefore, the current study recommends that C. olitorius and A. cruentus could be commercialised at 44 kg N ha-1 and 100 kg N ha-1 which were lower nitrogen application rates than those recommended for Amaranthaceae species. In V. unguiculata, 50 kg N ha-1 improved leaf number; however, this did not translate to any fresh yield advantage, implying that the optimum rate for nitrogen application might be lower than 50 kg N ha-1. Therefore, nitrogen rates less than the ones used in the current study are recommended for V. unguiculata. Chapter five (5) was conducted in winter and it was necessitated by observations made primarily in the previous studies which focused on the effects of single factors such as plant density, planting date and nitrogen deficits. Therefore, there was a need to address interactions between irrigation, nitrogen, spacing and planting date. The objective of this study was to evaluate growth, physiology and yield responses of Brassica juncea to different agronomic and management factors in the 2012 and 2013 seasons. The treatments were as follows: two planting dates in main plot (1 June and 18 July, 2012); two irrigation frequency in sub main plot (once and three times a week); three nitrogen levels (0, 50, 100 kg N ha-1) and three plant densities (133 333, 80 000, 50 000 plants ha-1) as subplots. Parameters measured included chlorophyll content index (CCI), chlorophyll fluorescence (CF), stomatal conductance (SC), leaf number, leaf area index (LAI) and biomass. Results from this study showed a significant interaction effect on plant height, LAI, CCI and CF. Crops irrigated thrice or once a week with 50 kg N ha-1 combined with 50 000 plants ha-1 produced tall plants and bigger leaves (LAI) in the early planting date (1 June) compared to other combinations. Irrigating three times a week combined with nitrogen application at 100 or 50 kg N ha-1 improved CF for late planting date (18 July) in comparison to other combinations. Irrigating once a week combined with nitrogen application at 100 kg N ha-1 increased CCI. There was no significant interaction effect on yield. Application of nitrogen at 50 and 100 kg N ha-1 significantly (P>0.05) increased yield in early and late planting dates compared to the control (0 kg N ha-1), in 2012 and 2013 winter season. Irrigating three times a week led to a significant (P<0.05) increase in yield in the late planting date (18th July) and early planting date (1st June) in 2013 season. Higher plant density of 133 333 plants ha-1 resulted in significantly (P<0.05) higher yield in terms of fresh mass and leaf number in the late planting date 18 July in 2012 and 2013 seasons. However, leaf quality parameters such as leaf size and colour was compromised at 133 333 plants ha-1 relative to 50 000 plants ha-1. Therefore, farmers are recommended to plant early, apply 50 kg N ha-1, irrigate thrice a week and utilise a spacing of 50 000 plants ha-1. The current study indicates that growth and yield of traditional leaf vegetables can be optimised through improved agronomic practise. / Agriculture and Life Sciences / D. Litt. et. Phil. (Agriculture)
388

Contextualizing the NCS through the use of school gardens in the Butterworth area

Rasi, Nandi January 2009 (has links)
The research focuses on how teachers can use school gardens sponsored by South African National Biodiversity Institute as resource materials for teaching and learning. The study also focused on how teachers can integrate local knowledge into the school curriculum. The setting of the research is Zizamele Senior Primary School situated in Zizamele community in Butterworth in the Eastern Cape. The study is designed in portfolio format. It consists of three separate studies: a contextual profile; a stakeholder analysis; and a small-scale action research project, which build on each other. By developing a contextual profile of the research site, and the school community and school gardens project, I was able to collect information that informed the stakeholder analysis and the action research study. Data for the contextual profile was gathered by using a variety of data gathering techniques like questionnaires and interviews. The findings were that: the study area is characterized by socio-economic issues like poverty, unemployment, drug abuse and crime. This requires that the people of the area take responsibility in addressing some of the problems by being involved and knowing where to report issues. The second study, which is the stakeholder analysis, was done to mobilize stakeholders’ contributions to the gardens project in Zizamele School, sponsored by the South African National Biodiversity Institute. Data was collected at meetings and workshops in the schools through interviews. Findings indicated that different stakeholders had various contributions to make and that they were prepared to work with the school and with each other to develop the school garden and the learning potential of the school garden. This paved the way for the small scale action research case study that would follow. The last study, the small scale action research, was undertaken in the same school, Zizamele School, and focused on investigating ways of integrating local knowledge into the curriculum and how teachers use the gardens as resource for teaching and learning, with reference to Life Orientation Learning Area. Data was collected by interviews, questionnaires and worksheets. The study involved two teachers who worked with me on the action research and Grade 5 and 6 learners, as well as some of the community stakeholders. The main finding of the action researched showed the potential for involving community members in the process of integrating local knowledge as a way of implementing aspects of the Life Orientation curriculum requirements. The three studies link with each other, and show that to start with an action research project, one needs to understand the context, and the roles of different stakeholders, and how they might contribute to the programmes in the school. Findings showed that teachers could use gardens as resource materials for teaching and learning, and that they could bring in local knowledge to the school curriculum.
389

How can school gardens be used for teaching environmental activities in the technology learning area at senior phase?

Mazingisa, Bongani Eric January 2009 (has links)
This study was conducted as a case study at the rural Ethridge Junior Secondary School which is located in the Eastern Cape Province of South Africa. The aim of the study was to investigate how school gardens could be used to teach environmental activities in the Technology Learning Area at senior phase. The study examined how environmental activities in the school garden can be used to develop technological concepts and knowledge and for developing technological problem-solving abilities. Furthermore, it examined the relationship between technology, society and environment, and how structural and socio-cultural factors influence the use of environmental activities in the school garden. The overall approach was a case study. The data was generated using qualitative methods such as interviews, observation, workshops and document analysis of learners’ work. Of all the research tools used, the interviews and observations were the most fascinating and informative methods. The study focused on various activities undertaken by Grade 8 learners in their Technology Learning Area. These activities were compost making, planting and irrigating. The study showed how learners from poor rural homes can use available resources and suitable technology processes to plant vegetables. In terms of resources, virtually all resources used in the study were free, sourced locally and/or borrowed. This indicated that even in poor, rural areas materials are available to make structures and complete activities. In terms of available suitable technology, learners in the study explored the use of old car tyres for planting containers that can be easily transported. They also, using easily available resources such as tin cans, explored how to design and construct an effective, low-water consumption, low cost irrigation devise. The study explored the achievement of Learning Outcomes (LO) using the school garden. This study uses the school garden as a teaching aid to achieve the three main LO’s in the Technology Learning Area (LA). This study has also indicated that LO’s are sometimes intertwined, that is to say that more than one can be achieved at the same time. The three activities (compost making, planting and irrigation) were used to attain the required LO’s. The study indicates that LO 1 (related to applying technological processes and skills ethically and responsibly) can easily be achieved by designing a compost box and a compost heap, making them and evaluating the process. LO 2 (related to understanding and applying relevant technological knowledge) could easily be achieved in the irrigation activity, and LO 3 (related to demonstrating interrelations between science, technology, society and environment) could easily be attained in both compost making and planting. The study also showed that curriculum activities, such as those used in this study, are influenced by socio-cultural and structural factors that influence the curriculum contextualizing process. The main findings of the study are captured in five analytical statements. These form the basis for a set of recommendations to inform the use of school gardens as a resource for technology teaching in Ethridge Junior Secondary School, and possibly for other rural schools.
390

Estudo comparativo da qualidade da água de chuva coletada em cobertura convencional e em telhado verde

Budel, Marcel Aramis 31 March 2014 (has links)
CAPES / O estudo consiste em uma comparação da qualidade da água da chuva coletada em duas formas distintas de captação: um sistema composto por um telhado inclinado com telhas de concreto, nomeada (casa 1) e o outro composto por uma cobertura plana com telhado verde, ou seja, vegetado, nomeada (casa 2). Tem por objetivo caracterizar os sistemas utilizados nas duas formas de cobertura, analisar a qualidade da água da chuva captada nos dois sistemas e fazer o acompanhamento da qualidade da água armazenada para posterior uso ao longo do estudo com o intuito de verificar a eficiência e comportamento dos sistemas de captação. Objetiva ainda encontrar relações nas variáveis envolvidas e apresentar os resultados de forma a estabelecer uma comparação qualitativa no desempenho das duas coberturas. O estudo foi realizado em duas casas localizadas na região noroeste da cidade de Curitiba, capital do Paraná. Na casa 1, com telhas de concreto, a água da chuva que escoa pelo telhado é primeiramente coletada por uma calha, seguindo por um duto vertical até o nível do solo, no qual se encontra um filtro simples, então a água é encaminhada para uma cisterna, onde é armazenada, para posterior uso na torneira externa para onde a água é bombeada. Já na casa 2, com cobertura plana vegetada, a água da chuva após passar pelo telhado verde é conduzida por dutos verticais até a cisterna de concreto no nível do solo, então uma eletrobomba recalca a água até um reservatório localizado na cobertura, acima do nível do telhado verde, para armazenamento e posterior uso na torneira externa. As amostras coletadas em nove eventos (17/05/2013 a 03/12/2013) foram analisadas quanto à: pH, turbidez, oxigênio dissolvido e temperatura, que foram medidos no próprio local. Demanda química de oxigênio (DQO), amônia, nitrito, nitrato e fosfato foram amostrados e analisados no laboratório de Saneamento da UTFPR, Campus Ecoville. Ainda quanto à presença de coliformes totais e termotolerantes (E. Coli), foram realizados em um laboratório terceirizado. Observou-se que o telhado convencional da casa 1 apresentou maior qualidade no parâmetro turbidez e demanda química de oxigênio (DQO), já o telhado verde diminuiu a acidez natural da água da chuva. As duas coberturas se mostraram eficientes pela concentração de amônia e nitrato, contudo indicaram concentrações elevadas de fosfato. Nos parâmetros microbiológicos os dois telhados não obtiveram qualidade suficiente para atender a NBR 15.527/2007. Desta forma, tomadas as devidas precauções, se recomenda o uso da água proveniente dos telhados, vegetados e convencional, para descargas de bacias sanitárias, irrigação de gramados e plantas ornamentais, lavagem de veículos, limpeza de calçadas e ruas, limpeza de pátios, espelhos d'água e usos industriais, conforme estabelecido na norma. / The study consists of a comparison of the quality of rainwater collected in two distinct ways of catchments: a system composed of a pitched roof with concrete tiles and another consisted of a vegetated flat coverage, as known as green roof. It aims to characterize the systems used in both forms of coverage, to analyze the quality of rainwater captured in the two systems and to monitor the quality of water stored for later use throughout the study in order to verify the efficiency and performance of catchment systems. It also aims to find relations in the involved variables and to present the results in order to establish a qualitative comparison in the performance of two coverages. The study was conducted in two houses located in the northwest region of the city of Curitiba, capital of Paraná. The appointee, house 1, has a pitched roof with concrete tiles, the rainwater that seeps through the roof is first collected by a trough, followed by a vertical duct to the ground level, with a simple filter, then the water is sent into a tank where it is stored for later use in the external faucet where the water is pumped. However, at house 2, with vegetated flat roof, after passing through the green roof the rainwater is driven by vertical ducts to the concrete tank at ground level, then an electric pump represses the water to a reservoir located on the roof, above the green roof ́s level for storage and later use on the external tap. Samples collected in nine events (17/05/2013 to 03/12/2013) were analyzed for pH, turbidity, dissolved oxygen and temperature, they were measured in situ. Chemical oxygen demand (COD), ammonia, nitrite, nitrate and phosphate were sampled and analyzed in the laboratory of Sanitation UTFPR Campus Ecoville. Nevertheless, for the presence of total and fecal coliforms (E. coli), tests were performed on an outsourced laboratory. As for the results obtained, the conventional roof house 1 rainwater had higher quality in turbidity and chemical oxygen demand (COD) parameter, whereas in house 2 the green roof reduced the natural acidity of rainwater. The two covers were effective in the concentration of ammonia and nitrate, though indicated high concentrations of phosphate. Microbiological parameters in neither roofs met the NBR 15.527/2007 quality. Thus, taken due precautions, it is recommend the use of water from roofs, vegetated and conventional, to flush toilets, to irrigate lawns and ornamental plants, to wash vehicles, to clean sidewalks and streets, to clean patios, water mirrors and to industrial uses, as defined in the standards.

Page generated in 0.0894 seconds