Headland Sediment Bypassing and Overpassing: Examples From Southern Brazil

Klein, Antonio H. F.; Silva, Guilherme Vieira da; Short, Andrew D.; Toldo, Elírio E.; Pinto, Maiara Werner

doi:10.1142/9789811204487_0233

“…The headland sediment bypassing (HSB) and overpassing (HSO) is a process in which sediment is transported by wind or waves from the updrift side of a headland to the downdrift side [26,27]. Both, HSB and HSO are important components of regional sediment budget of some coasts [27,34,42].…”

Section: Introductionmentioning

confidence: 99%

The influence of the agricultural management systems in the maintenance of the biodiversity in benefit of the Phyto sanity control

Pinto¹,

Klein²,

Acevedo³

et al. 2021

IJAERS

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This paper describes the overpassing process using a case study from southern Brazil, that present a decadal pulse of sediment entering in the system. A transgressive dune field extends across a headland from Santinho beach to Ingleses beach. Analysis of precipitation data (1961-2014), wind direction and speed (1964-2014), aeolian drift potential (DP), aerial photographs/satellite images (between 1938 and 2016) and morphological data (2002, 2010 and 2014) make it possible to analyze the decadal-scale dune field evolution. The wind historical data showed southern wind as the stronger, moving the dune crests to north. The rainfall analysis presents an increasing trend leading to a decrease in drift potential and favors dune stabilization by vegetation growth. There is a decadal pulse of sediment inputs to the system, as well. The northern sector of Santinho beach has a positive budget and provides about 6,000m³/year of sediment to the foredune. Then, with southern winds, the sediment migrates into the dune field (about 3,000-5,000m³/year) reaches Ingleses by overpassing, ensuring a positive sediment budget for the system that occurs at east side of the Ingleses beach.

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“…The headland sediment bypassing (HSB) and overpassing (HSO) is a process in which sediment is transported by wind or waves from the updrift side of a headland to the downdrift side [26,27]. Both, HSB and HSO are important components of regional sediment budget of some coasts [27,34,42].…”

Section: Introductionmentioning

confidence: 99%

Stabilization at Santinho-Ingleses dunefield, Southern Brazil: What will be the future of sediment input to Ingleses Beach?

Pinto¹,

Klein²,

Acevedo³

et al. 2021

IJAERS

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0

View full text Add to dashboard Cite

This paper describes the overpassing process using a case study from southern Brazil, that present a decadal pulse of sediment entering in the system. A transgressive dune field extends across a headland from Santinho beach to Ingleses beach. Analysis of precipitation data (1961-2014), wind direction and speed (1964-2014), aeolian drift potential (DP), aerial photographs/satellite images (between 1938 and 2016) and morphological data (2002, 2010 and 2014) make it possible to analyze the decadal-scale dune field evolution. The wind historical data showed southern wind as the stronger, moving the dune crests to north. The rainfall analysis presents an increasing trend leading to a decrease in drift potential and favors dune stabilization by vegetation growth. There is a decadal pulse of sediment inputs to the system, as well. The northern sector of Santinho beach has a positive budget and provides about 6,000m³/year of sediment to the foredune. Then, with southern winds, the sediment migrates into the dune field (about 3,000-5,000m³/year) reaches Ingleses by overpassing, ensuring a positive sediment budget for the system that occurs at east side of the Ingleses beach.[53] has shown a significant influence of overpassing on shoreline position, when the shoreline of the northern coast of Santinho accretes between 1 and > 5m/years-¹ Maiara Werner Pinto et al.

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