English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

As propriedades morfometricas, climaticas e biologicas de uma bacia hidrografica sao fatores determinantes de seus processos morfogeneticos relacionados ao trabalho fluvial, como a erosao, o transporte e a deposicao de sedimentos. Nessa perspectiva o escoamento superficial e suas modalidades constituem um dos principais agentes erosivos em bacias hidrograficas semiaridas. A erosao dos solos apesar de ter causas naturais como a morfometria do relevo, os aspectos fisicos do solo e a intensidade e duracao da precipitacao, pode ainda ser intensificada pela acao antropica atraves do uso do solo como recurso natural. No entanto, a elaboracao de modelos capazes de simular esses fenomenos em bacias hidrograficas continua sendo um desafio. Os avancos na cartografia digital trouxeram uma nova perspectiva na criacao de modelos geograficos assim como na sua representacao atraves de mapas. No presente artigo propoe-se um modelo de representacao espacial da susceptibilidade a erosao da Sub-bacia do Alto Mundau, comparando seus resultados com variaveis morfometricas pertinentes as propriedades erosivas e ao escoamento superficial. A Sub-bacia hidrografica do Alto Mundau localiza-se a noroeste do estado do Ceara, a barlavento do macico de Uruburetama pertencente ao municipio de mesmo nome. Com auxilio de ferramentas de geoprocessamento, foi possivel a extracao dos parâmetros morfometricos da sub-bacia. A criacao do modelo de susceptibilidade a erosao obedeceu a tecnica de sobreposicao de camadas (layers) conhecida como algebra de mapas, onde foram combinadas camadas matriciais com informacoes de declividade, intensidade pluviometrica, uso e cobertura do solo e tipos hidrologicos de solo. A B S T R A C T Morphometric, climatic and biological properties of a watershed are determining factors of their morphogenetic processes related to fluvial process, such as erosion, transport and deposition of sediments. From this perspective, surface runoff and its modalities are a major erosive agents in semi-arid watersheds. Despite natural causes such as morphometry relief, the physical aspects of soil and the intensity and duration of rainfall, Soil erosion can still be intensified by human action through the use of soil as a natural resource. However, the development of models able to simulate these phenomena in watershed remains a challenge. Advances in digital cartography brought a new perspective on creating geographic models as well as its representation through of the maps. In the present paper we propose a spatial representation model of susceptibility to erosion of the Sub-basin of the upper reaches Mundau by comparing their results with morphometric variables relevant to the erosive properties and surface runoff. The Sub-basin of the Upper reaches Mundau is located at the northwest of the state of Ceara, in the massive of the Uruburetama windward belonging to the municipality of the same name. With the help of geoprocessing tools, the extraction of morphometric parameters of the sub-basin was possible. The creation of the susceptibility to erosion model obeyed layers overlay technique known as map algebra, which were combined with matrix layers slope information, rainfall intensity, land use and land cover and hydrological soil types. Keywords: Morphometry; Surface Runoff; Map algebra.

Susceptibilidade à Erosão Relacionada ao Escoamento Superficial na Sub-Bacia do Alto Mundaú, Ceará, Brasil (Susceptibility to Erosion Related to Surface Runoff in the Sub-Basin of the Upper Course of the Mundaú, Ceará, Brazil)