NDLI: Elaboração e Aplicação de Índices de Fragmentação e Conectividade da Paisagem para análise de bacias hidrográficas (Development and Application of Landscape Fragmentation and Connectivity Index to Watershed Analysis)

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Elaboração e Aplicação de Índices de Fragmentação e Conectividade da Paisagem para análise de bacias hidrográficas (Development and Application of Landscape Fragmentation and Connectivity Index to Watershed Analysis)

Content Provider	Semantic Scholar
Author	Goerl, Roberto Fabris Siefert, Cesar Augusto Crovador Schultz, Gilson Bauer Santos, Camila Strapasson Dos Santos, Irani Gomes Dos
Copyright Year	2012
Abstract	A paisagem pode ser considerada uma unidade espacial, cuja heterogeneidade e modificada principalmente pela relacao entre sociedade e natureza. A analise da paisagem e fundamental para designar a sua configuracao, expressa na estrutura espacial das suas subunidades. Desta forma, torna-se factivel a investigacao das implicacoes da configuracao espacial da paisagem na dinâmica hidrologica, sobretudo mediante as nocoes de fragmentacao e conectividade. A conectividade estabelece o grau de facilidade que os elementos podem se mover entre as unidades de paisagem. A fragmentacao e caracterizada pela ruptura da conectividade. Neste contexto, o presente trabalho teve por objetivo elaborar e aplicar indices para avaliar a fragmentacao e conectividade na bacia experimental Santa Alice, SC. As principais analises foram realizadas com base no uso do solo, mapeado atraves da ortofotocarta (1:10.000) pela qual foram identificados os principais usos do solo: Campos, Estradas, Floresta Nativa, Mata Ciliar, Pinus e Solo Exposto. Os resultados dos indices demonstraram que a bacia e altamente fragmentada (213 fragmentos) devido a pratica de reflorestamento. Na bacia, os elementos hidrologicos (drenagem) estao diretamente ligados a Mata Ciliar, demonstrando-se o cumprimento da legislacao ambiental. Por outro lado, a intersecao da drenagem com as estradas implicou em uma conectividade hidrologica com os demais usos, principalmente pela propagacao de fluxo superficial pelas estradas ate estas intersecoes. A aplicacao de indices se mostrou uma metodologia efetiva para determinar a conectividade/ fragmentacao, alem de poder ser aplicada em outras bacias, buscando compreender a dinâmica da paisagem em diferentes escalas. Palavras-chave: eco-hidrologia; metricas de paisagem; uso do solo; estradas. Development and Application of Landscape Fragmentation and Connectivity Index to Watershed Analysis ABSTRACT The landscape can be considered a spatial unit, whose heterogeneity is modified mainly by the relationship between society and nature. The landscape analysis is essential to describe its configuration, expressed in the spatial structure of its subunits. Thus, it becomes feasible to investigate the implications of the landscape spatial configuration in the hydrological dynamics, especially by the notions of fragmentation and connectivity. The connectivity determines how easily the elements can move between landscape units. Fragmentation is characterized by disruption of this connectivity. In this context, the present work aimed to develop and apply index to assess the fragmentation and connectivity in the Santa Alice experimental watershed, SC. The main analysis was performed based on land use, mapped by orthophoto (1:10000) by which were identified the main land uses: Grassland, Roads, Native Forest, Riparian Forest, Pine and Exposed Soil. The results of the index analysis showed that the watershed is highly fragmented (213 fragments) due to reforestation practices. In the watershed, the hydrological elements (drainage) are directly linked to Riparian Forest, showing environmental policy compliance. On the other hand, the intersection of roads with drainage resulted in a hydrological connectivity with other uses, mainly by the propagation of surface flow along the roads to these intersections. Finally, the use of this index showed to be an effective methodology to determine connectivity/fragmentation, and can be applied in other basins to understand the dynamics of the landscape at different scales. Keywords: eco-hydrology; landscape metrics; land use; roads.
Starting Page	1000
Ending Page	1012
Page Count	13
File Format	PDF HTM / HTML
DOI	10.26848/rbgf.v4i5.232678
Volume Number	4
Alternate Webpage(s)	https://periodicos.ufpe.br/revistas/rbgfe/article/download/232678/26690
Alternate Webpage(s)	https://doi.org/10.26848/rbgf.v4i5.232678
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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