Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo da vazão específica nas bacias hidrográficas dos rios Aguapeí e Peixe como subsídio à gestão dos recursos hídricos

A área de estudo deste trabalho engloba as bacias hidrográficas dos rios Aguapeí e Peixe, localizadas a Oeste do Estado de São Paulo. Estas por sua vez estão vinculadas aos Comitês de Bacias Hidrográficas Aguapeí e Peixe (CBH-AP). Diante da iminência da implementação da política de cobrança pelo uso dos recursos hídricos nessa área, o presente trabalho apresenta em linhas gerais o estudo da vazão específica de forma que os resultados possam contribuir com os órgãos públicos de gestão a fim de que se execute uma gestão mais efetiva dos recursos hídricos. Com base em dados hidrológicos das estações fluviométricas inventariadas através do Sistema Integrado de Gestão de Recursos Hídricos do Estado de São Paulo (SIGRH) e da Agência Nacional de Águas (ANA) nas duas bacias hidrográficas, procedeu-se o estudo da vazão específica. Os resultados desses estudos apontam para uma maior variabilidade da vazão específica média na bacia hidrográfica do rio do Peixe, uma vez que ao longo da série histórica essa bacia apresenta maiores valores de vazão, foi possível também observar as mudanças no comportamento da vazão hidrológica nas duas bacias hidrográficas, ou seja, através dos três períodos hidrológicos identificados foi possível depreender que a vazão específica média em um período se mostra bem distribuída em ambas as bacias hidrográficas, em outro período hidrológico essa distribuição já se apresenta mais desigual. Tais informações possibilitam aos órgãos de gestão um planejamento mais refinado e eficiente

Análise ambiental simplificada no entorno de águas superficiais na bacia do rio Corumbataí (SP)

The basin of the Corumbataí river is of vital importance to over 600 thousand people, who depend on its waters for consumption. The Simplified Analisys of Environmental Impacts in the Areas Surrounding the Surface Waters of the Drainage Basin of the Corumbataí River (SP) is aimed at defining the areas which are most susceptible to degradation or already damaged and propose engineering solutions according to the environmental problems identified. Using a questionnaire to indicate possible impacts in the surroundings, I related human actions to these damage and quantified them. Having studied the basin extensively and selected 42 areas - generically identified as points and grouped as sub-basins and according to the soil usage -, I was able to identify the main environmental impacts in the basin as: sugar cane monoculture, lack of riparian forest, damaged areas due to mining, the bad state of rural roads and bridges, rubbish disposal alongside roads or directly into the river, accelerated and unplanned expansion of residential and industrial areas into the rural areas and river sources, and Rio Claro's untreated city wastewater

Suscetibilidade geomorfológica e restrições legais ao uso da terra: subsídios para o planejamento territorial

O presente trabalho objetivou oferecer subsídios para o Planejamento Territorial, através da caracterização geomorfológica da Bacia do Ribeirão Piracicamirim, caracterização esta que permitiu reconhecer a morfodinâmica dos ambientes pleiteados à ocupação e/ou já ocupados. Através desta caracterização foi possível conhecer as suscetibilidades geomorfológicas da área e, a partir daí, verificou-se algumas especificações da Legislação Ambiental Brasileira referente a estas áreas. Além das características do relevo, foram analisadas também algumas das regulamentações referentes à conservação da vegetação, para assim, apontar sob a forma de registro cartográfico, os setores onde ocorre legalmente a limitação ao uso e ocupação do solo. A fim de se alcançar os objetivos traçados, foi utilizada a abordagem direta e indireta da bacia hidrográfica do Ribeirão Piracicamirim. A primeira foi realizada através de trabalhos de campo e a segunda foi efetuada através da revisão bibliográfica, cartográfica e da elaboração de documentos cartográficos da área. Como orientação metodológica foi adotada a Teoria Geral dos Sistemas aplicada à ciência geográfica. Os documentos cartográficos produzidos mostraram que alguns setores da presente bacia necessitam de uma melhor atenção quanto às questões ambientais. Tratase de áreas onde o conjunto das características físicas do ambiente, juntamente com o uso e ocupação da terra predominante tem ocasionado intensos processos erosivos em diferentes estágios de evolução. Constatou-se que a retirada da mata original para o cultivo da cana-de-açúcar tem ocasionado grandes problemas erosivos que merecem uma melhor atenção dos órgãos responsáveis pelo Planejamento Territorial da bacia.

Estudo dos mixozoários (Myxozoa : Myxosporea) parasitos dos peixes characiformes Acestrorhynchus lacustris (Lütken, 1875) e Steindachnerina insculpta (Fernández-Yépez, 1948) coletados no Rio do Peixe, médio Rio Tietê, SP, Brasil

The São Paulo State has as one of its main rivers the Tietê, which is an extremely important source because of its biodiversity, use in navigation and mainly as direct supplier of water for thousands of people in the region. Currently, the biodiversity of marine and freshwater ecosystems has been threatened, primarily by environmental problems resulting from the degradation of ecosystems, an example is the stretch of the Middle Tietê River, where the Barra Bonita dam (SP) focused virtually the whole load organic effluents from the metropolitan region of São Paulo, leading to eutrophication with the loss of water quality. This basin is located in the Peixe’s River, a tributary of the Barra Bonita whose sources are on the slopes of the Cuesta de Botucatu, presenting an altitudinal gradient in a good state of conservation and water quality. From another perspective, the studies related to parasites and other pathogens of aquatic organisms have considerably increased the relevance, especially those hosts with potential for growing and marketing, given the significant increase these activities in Brazil and worldwide. Among the agents responsible for diseases in fish are the myxosporean, which can cause major economic damage, with high mortality ratios. Based on the above, this study evaluated the biodiversity of myxosporean parasites of two species of fish Acestrorhynchus lacustris and Steindachnerina insculpta. During the period January to November 2012, 40 specimens of Acestrorhynchus lacustris and 33 specimens of Steindachnerina insculpta were collected from the Peoxe’s river at four different points. The necropsies were performed and all organs were analyzed looking for myxosporean. Only the species Steindachnerina insculpta had their gills parasitized by two species of the genus Henneguya

Alterações morfohidrográficas do setor de fundo de vale do rio Piracicaba sob influência do reservatório de Barra Bonita (SP)

O homem modifica o ambiente ao seu redor gerando alterações “nos elementos que se encontram em contato direto com suas atividades, como a cobertura vegetal, as formas do relevo e a rede hidrográfica” (CASSETI, 1994). Assim, destacam-se as áreas submetidas ao represamento, cujos reflexos incidem diretamente sobre as formas do relevo. Desta forma, a geomorfologia atua como uma ciência de análise das alterações ocorridas na rede de drenagem e nas feições geomorfológicas, e a cartografia geomorfológica antecipa-se como instrumento da geomorfologia. O objetivo principal da pesquisa foi identificar e analisar as alterações morfohidrográficas e morfométricas provocadas pela construção do reservatório de Barra Bonita no curso final do Rio Piracicaba. A orientação metodológica vincula-se à Teoria Geral dos Sistemas Aplicada à Geografia e à análise da dinâmica de sistemas morfohidrográficos. Para as técnicas, foram confeccionados mapas geomorfológicos e de uso e ocupação das terras dos anos de 1962 (ano anterior à construção da barragem) e 2007 (selecionado como ponto de partida para a análise das alterações morfohidrográficas). Em 1962 existiam barras de meandro, canais e meandros abandonados, terraços fluviais, diques marginais, lagos e lagos de meandros. Em 2007 estes são comprometidos devido à mudança de nível de base local, fato demonstrado pelo desaparecimento de meandros e canais abandonados nas planícies aluviais, fragmentação de terraços fluviais, mudança de foz pelos canais tributários do rio principal e surgimento de novas lagoas. Para o uso, no ano de 1962 existiam grandes áreas de vegetação de “campo úmido”, atrelado à feição geomorfológica “planície aluvial”, que se encontrou alagada no ano de 2007. Foram também calculados os índices de sinuosidade, densidade de meandramento, número de meandros, área... (Resumo completo, clicar acesso eletrônico abaixo)

Avaliação da erosão hídrica, transporte de sedimentos e qualidade da água na bacia do córrego Monjolo Grande

Understanding the linkages between the natural elements is essential for being promoted the land use, occupation and sustainable management of environmental systems. Universal Soil Loss Equation (USLE), as a predictive model of erosion, is important to allowing the prevention of possible environmental impacts which may drastically interfere in natural or anthropic environments, as well as prevent potential financial wastes and even contribute to greater efficiency of agricultural production. This research will be working some USLE parameters, emphasizing topographic factor from Ribeirão Monjolo Grande watershed. Among the factors considered by the USLE, the Topographic Factor interferes directly in the erosive dynamic of a watershed because it involves variables related to hydrological processes that occur on it. In this research, were discussed different methods for obtaining the Topographic Factor (BERTONI e LOMBARDI NETO, 1985; MOORE e BURCH, 1986; DESMET E GOVERS, 1996) in GIS environment. After comparison between the methods, was indicated that best represents the conditions of geometry strand of the study area. Finally, other factors (R, K, C, P) considered by the USLE were obtained. The attainment of these parameters were guided by the use of geotechnologies, especially in Geographic Information Systems (GIS), with the assistance of secondary data and periodic field visits. The results obtained contributed to the understanding of hydrosedimentological dynamic in this area and serve as a viable strategy for studies of soil loss, aiming at developing consistent material for future researches about environmental planning and land management

Proposta de restauração de mata ciliar utilizando técnicas de nucleação no município de Regente Feijó

This monograph, presented in order to obtain the title of Environmental Engineer, proposes the use of nucleation techniques for the restoration of permanent preservation areas formed by three springs that contribute to the formation of Santo Anastacio river, city of Regent Feijo – São Paulo. Through Mine Water Project, landowners are encouraged to restore and conserve springs that contribute to the public water supply, being paid through the fees for environmental services. Once the simulation of this payment was reached at R$ 630.00 per year. Nucleation techniques will be proposed in order to facilitate the ecological succession, through techniques known as transposition of the soil, transposition of the branches, artificial perches and planting in groups of Anderson, totaling 81 cores covering an area of 208.3 m2 which corresponds to 1.9% of the total area to be restored. Made the survey of forest fragments in the watershed, it was found that only 12.39% of the total area has remnant vegetation

Pluviosidade, circulação atmosférica e vazão hídrica na bacia do rio Itajaí, Santa Catarina, Brasil

This research sought to understand the temporal and spatial distribution of rainfall and its effect on water dynamics on a regional basis, taking into account the pace of climate paradigm. The study area covers the entire river basin of the Itajai and its surroundings understood, roughly, between parallels 26° and 28° south latitude and 48° and 50° 30' west longitude, place of constant heavy rains and floods. In this region, pluviometric and fluviometric data were obtained, the variables of rainfall and water flow, which were compiled and analyzed using spreadsheets in order to get the series with more homogeneous data as possible for good analysis, the period between 1953 and 1982. This historical period has passed in principle by an analysis which sought to highlight the variability and distribution of rainfall and water flow in the basin-level annual, techniques which were used that allowed the choice of standard year representative (rainy, dry , usual) series. These obtained years (1957, 1968 and 1971, respectively) underwent a detailed analysis on the monthly level, providing good interpretation of the dynamic behavior of rain associated with dynamic water flow for these representative years

Diversidade gênica no gênero Astyanax (Teleostei : Characidae) através da análise de PCR-RFLP de DNA mitocondrial

O gênero Astyanax é um dos mais abundantes e diversificados da família Characidae (subfamília Tetragonopterinae), com mais de 100 espécies nominais, estando amplamente distribuído na bacia do Alto rio Paraná. Esse gênero é caracterizado pela similaridade quanto à forma do corpo, além da alta variabilidade citogenética intra e interpopulações, sendo comum a ocorrência de espécies crípticas ou complexos de espécies. Devido à escassez de dados sobre genética molecular referentes a esse gênero, e a dificuldade na identificação taxonômica, fazse necessário um estudo utilizando marcadores moleculares que visem desenvolver métodos rápidos e eficientes para caracterização de espécies de Astyanax com base em análises de DNA. Em vista dessa necessidade, o presente trabalho teve como objetivo avaliar a eficiência da técnica de PCR-RFLP do gene mitocondrial Citocromo b na identificação e caracterização da variabilidade genética de cinco espécies do gênero Astyanax que ocorrem na bacia do Alto rio Paraná. O mtDNA das espécies alvo foi totalmente amplificado, num total de cerca de 1140 pares de bases (pb). As análises foram obtidas através dos haplótipos gerados com a digestão por três enzimas de restrição que clivam estes genes, sendo estas ALUI, BAMHI, e HPAII. Foram analisadas 2 populações de Astyanax paranae, A. altiparanae, A. fasciatus, A. bockmanni, e uma população de A. biotae, com amostragens variando entre 5 e 10 indivíduos de cada população. Como grupo externo foram analisadas duas populações de Astyanax ribeirae da bacia hidrográfica do rio Ribeira de Iguape. Ao final do trabalho foi possível a identificação de 4 das 6 espécies analisadas, sendo que as espécies mais divergentes são A. altiparanae e A. ribeirae, as espécies A. paranae + A. bockmanni e A. fasciatus + A. ribeirae são as mais fortemente relacionadas...(Resumo completo, clicar acesso eletrônico abaixo)

Análise ambiental da problemática relacionada à falta de água no município de Itu, SP

The water resources scarceness in world become more evident and worried everyday, because the occurrence of water waste, without consider context of potable water deficit, period of long dryness, resource distribution and population density, urban concentration, industrial and rural areas, pollution process, contamination, beyond aspect related to sanitation and public health affect an entire population. At Itu city, this problem is already real, the population face the lack of water risk in dryness period, damaging their life quality and the city economic development, because Itu is a touristic city that has a mixed economy with activities in business dealing, agriculture and industrial department, all conect to water consumption.

Uso do modelo de simulação 'ABC 6' para avaliação de áreas sujeitas à ocorrência de ondas de cheia e corridas de massa/detritos: estudo de caso na bacia do Ribeirão da Prata (SP)

Pipelines are linear engineering works, designed mostly for transporting oil and its derivatives for long distances, furnishing even the farthermost zones of the country. Due to oil sector needs to ensure for the safety and conservation of its properties, several geotechnical studies are being held at the pipelines field, in order to preserve this important transportation, and also to prevent accidents, which might seriously compromise the environment and the population who lives around it. The OSBRA pipeline, who connects the city of Paulínia to the capital Brasília, is one of these engineering works that deserves to be pointed out. This research, performed at the Ribeirão da Prata Basin, was a pilot study conducted with the main objective of testing the current methodology efficiency, for future applications in the closest watersheds to the OSBRA pipeline. The objective of this research is to analyze flood wave and debris flow processes in a non-fictional watershed, by comparing two different kinds of methods: the first one based on simulation models (software ‘ABC 6’), and the other one by flood wave and debris flow susceptibility mapping. The results from the hydrological modeling were both hydrographs and ietographs that estimated values of outputs and infiltration. To construct the susceptibility maps were necessary three other maps: ground use and occupation maps, divided according to the different protection degrees that were offered to the ground; maps of dam locations in the area and physiographic compartimentation maps, divided according to the local geology. To complete the methodology, the results were collected from both methods for comparison. The obtained product for this methodology was series of data whose different susceptibility degrees to flood wave and debris flow could define the safest route for a pipeline crossing in this watershed...

Bioengenharia no controle de processos erosivos de áreas de hidrelétricas – o caso da PCH Costa Rica (MS)

The crescent increasing demand of the electric power in Brazil has stimulated the implantation of Small Central Hydroelectric Power (SCHP) in several regions of the country. However, the silting up of the reservoirs is one of the main problems faced by hydroelectric power plants and SCHP. In this context, this research aimed evaluate the phenomenology and propose the enforcement of appropriate bioengineering techniques to control the intense erosive process of the hydrographical basin of the “Alto Rio Sucuriú,” that cause silting up of the reservoirs of the SCHP Costa Rica, located in the municipal district of Costa Rica (MS). In order to identify the phenomenology of the main falling in of this basin, a diagnosis of the conditions of the physical environment of the region (climate, geology, pedology, hydrology, and use of the ground) was realized. A surveying was also realized to specify the geometric feature of the falling in using the Total Station of the Ruide brand, series RTS 860R and the geodetic GPS of the Ashtech brand and the data obtained was used on the preparation of the Digital Elevation Model (DEM) of the falling in. Based on this diagnosis an official register of the falling in was done with identification of the different types of present erosion. Due to the advanced erosive stage of the falling in researched, the use of bioengineering techniques could be the best solution considering that the traditional engineering techniques make use of heavy material like concrete, iron and large machines that besides causing higher impact to the natural and esthetic aspects of the environment also require a higher investment of capital. This research establish a great cooperation to the knowledge of the erosive process and of the rehabilitation of the degraded areas with application of bioengineering techniques not only hydrographical basin of “Alto Rio Sucuriú” but also to other basins that show similar situation

Diagnóstico ambiental das nascentes do Córrego dos Macacos – município de Álvares Machado/SP

Environmental diagnosis fits in analysis social-spatial organization insofar it contributes to understanding past and present aspects of how a territory works as well as enables the creation of statements for future ordainment. In this context, the present study aims at contributing with data for creating recovery and environmental preservation projects for the basin of Macacos‟ stream‟s headwaters, located in the north of Álvares Machado county in São Paulo state. To achieve this purpose, the main characteristics and existing uses in the basin have been analyzed and its main environmental problems were identified in the data and information collected in journals, field work and interviews with dwellers from the interested area and local government authorities. On this way, a diagnosis of the environmental state of the studied area was performed considering its specific issues regarding the natural and physical process as well as human influences. From the analysis carried out it was possible to identify environmental impacts on different levels resulting from the conflictuous relation between uses and occupations and the natural dynamics of the studied basin.

Simulação de produção de sedimentos em microbacias em função de cenários de restauração florestal

In São Paulo state, deforestation and agriculture activities are increasing soil losses processes, especially in areas of susceptible soils where properties not adopt soil conservation practices. Environmental adequacy at property level regarding Permanent Protection Areas and Legal Reserves is considered a factor on reducing soil losses and considering that we assessed soil losses of different scenario of environmental adequacy. Simulations of erosive process were carried out in 15 catchments of Corumbataí river basin, according to different forest restoration scenarios, as well as the current situation of land use/land cover. The scenarios include the implementation of Permanent Preservation Areas (PPA), the reforestation of variable source areas, and two scenarios, the Legal Reserve installation in 20% of each catchment, being one of them for most critical areas in terms of erosion and the other at random. It was observed that the establishment of PPA and the reforestation of hydrologically sensitive areas, offered only a small contribution to the control of the erosive process, resulting in a reduction of 10% and 7,8%, respectively, while the legal reserve in critical areas has a significant reduction of 69,8%. The random scenario, in turn, resulted in a reduction of only 21,4%. Results show that reforestation could reduce soil losses, but previous studies of land prioritization and planning could increase significantly its efficiency at this process.