Modeling an arrested salt-wedge estuary subjected to variable river flow

Couceiro, Mariana Afonso Abade; Schettini, Carlos Augusto França; Siegle, Eduardo

doi:10.1016/j.rsma.2021.101993

Cited by 2 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value, however, may vary, given that it was not possible to determine the exact extent of sea wedge intrusion during collection because collection sites were located 5-7 km apart from each other. Previous studies observed high salinity values (>2000 μS cm −1 ) in estuaries at 5 km from the sea; an EC of 2000 μS cm −1 is the tolerance threshold of irrigated rice (D' AQUINO 2011, COUCEIRO et al 2021.…”

Section: Resultsmentioning

confidence: 99%

Estudo da salinidade em águas de irrigação utilizadas na lavoura arrozeira

Martins

Poletto²

2022

Rev. Ciênc. Agrovet.

View full text Add to dashboard Cite

No estado de Santa Catarina predomina na sua totalidade o cultivo de arroz irrigado e a água utilizada para a irrigação destas lavouras em sua maioria são retiradas diretamente de cursos de água. A região da Bacia Hidrográfica do Rio Mampituba tem sua economia baseada no cultivo do arroz irrigado, cujas plantas são sensíveis à salinidade. O presente trabalho objetivou determinar a flutuação de salinidade na água do Rio Mampituba (Sul do Brasil) utilizada para irrigação na lavoura arrozeira durante as quatro estações do ano. Para a determinação da salinidade foram realizadas coletas de água em seis locais no percurso do rio, desde sua nascente até a foz. Em cada local foram coletadas três subamostras de água com intervalo médio de 15 dias iniciado em maio de 2016 e finalizado em abril de 2017 e analisada a condutividade elétrica (CE). A caracterização do dano por salinidade em plântulas de arroz foi realizada nas cultivares IRGA 417 e EPAGRI 106. As plântulas foram transplantadas para solo inundado com diferentes concentrações salinas no estádio S2. A CE ao longo do período avaliado variou de 224 a 20.120 µS cm−1 e foi maior nos pontos mais próximos ao mar. Os maiores valores de salinidade foram observados entre os meses de novembro de 2016 e janeiro de 2017. Foi possível observar relação inversa entre a precipitação e a salinidade. A salinidade causa danos as plantas de arroz sendo os principais danos observados em plântulas. Estes danos foram clorose da ponta do limbo foliar, enrolamento foliar e necrose de folhas velhas. É importante que os orizicultores saibam como é a flutuação da cunha salina dentro do estuário, além de quais níveis incidem em cada local e em cada época do ano.

show abstract

Section: Resultsmentioning

confidence: 99%

Estudo da salinidade em águas de irrigação utilizadas na lavoura arrozeira

Martins

Poletto²

2022

Rev. Ciênc. Agrovet.

View full text Add to dashboard Cite

show abstract

“…The Reynolds stress components are computed using the eddy viscosity concept [43]. The reason for choosing this model is its worldwide use that has confirmed its ability to simulate 3D hydrodynamics in estuaries [3,5,44,45]. The 3D hydrodynamic model results obtained by [26] using the interface of the suite of Delft3D-FLOW software in its three-dimension option [37][38][39] has been used to carry out this study.…”

Section: Study Area and Setup Of The 3d Hydrodynamic Modelmentioning

confidence: 99%

Section: Study Area and Setup Of The 3d Hydrodynamic Modelmentioning

confidence: 99%

“…Numerous studies have analyzed the mixing processes that occur in estuaries due to the interaction of runoff and different tides [1][2][3][4][5][6]. Moreover, the dependence on salinity mobility within the estuary itself due to differences in bathymetry, for example, directly affects the movement of internal estuarine currents [7], which may result in stratification or mixing fronts varying three-dimensionally and not only two-dimensionally [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Dynamic Estuarine Classification of the Vertical Structure Based on the Water Column Density Slope and the Potential Energy Anomaly

Lupiola,

Bárcena,

García-Alba

et al. 2023

Water

View full text Add to dashboard Cite

The aim of this work is to develop a new estuarine classification attending to their vertical structure by examining the advantages and disadvantages of the existing classifications. For this purpose, we reviewed the main classifications, finding that most of them analyze the entire estuary as a unique water body without considering the spatiotemporal variability of the mixing zone in estuaries. Furthermore, the proposed classifications require the calculation of parameters that are not easily measurable, such as tidal current amplitude. Thus, we developed a new classification based on density profile slopes of the water column, which has been correlated to the potential energy anomaly. To test this classification, the proposed method was applied to the Suances estuary (Spain) during the year 2020 and to analyze the potential estuarine modifications under four climate change projections (RCP 4.5 and 8.5 for the years 2050 and 2100). To carry out this study, a calibrated and validated high-resolution horizontal and vertical 3D model was used. The application showed a high variability in the vertical structure of the estuary due to the tide and river. According to the proposed classification, the well mixed category was predominant in the estuary in 2020 and tended to grow in the projections of climate change. As a result, the fully mixed and weakly stratified mixing classes were reduced in the projected scenarios due to a decrease of external forcing, such as river flow and sea level rise. Furthermore, areas classified as stratified tended to move upstream of the estuary.

show abstract

Modeling an arrested salt-wedge estuary subjected to variable river flow

Cited by 2 publications

References 34 publications

Estudo da salinidade em águas de irrigação utilizadas na lavoura arrozeira

Estudo da salinidade em águas de irrigação utilizadas na lavoura arrozeira

A Dynamic Estuarine Classification of the Vertical Structure Based on the Water Column Density Slope and the Potential Energy Anomaly

Contact Info

Product

Resources

About