ABSTRACT.The Mampituba River drains a watershed with 1,200 km 2 in area, having its springs in the Serra Geral and debouching to the Atlantic Ocean at city of Torres, after running a 62 km long course. It has a mean discharge of 18.6 m 3 .s -1 , a mean depth around 4 m and is under a microtidal regime. An oceanographic campaign was carried out at May 17 th , 2008, when water level, currents, salinity and suspended sediment concentration were recorded during two tidal cycles (25 hours). The water level presented a decreasing trend during the campaign, and the mean tidal range was 0.4 m, with flood dominated asymmetry. The current pattern was bi-directional with mean ebb and flood velocity of 0.33 and 0.13 m.s -1 , respectively. The estuarine stratification followed the tide, with the salt wedge intrusion extending 5 km up-estuary. The total salt transport was 1.11 kg.m -1 .s -1 out to the estuary. The fluvial discharge component accounted for 98% of the seaward transport, whereas the landward transport had 51% due to the gravitational circulation, 26% due to tidal correlation and 19% due to tidal pumping. The suspended sediments transport was mainly due to the gravitational circulation, which accounted for 83% of the total transport. The Mampituba River estuary hydrodynamics responds mainly to the river, presenting a highly stratified behavior.Keywords: circulation, advective transport, transport processes. RESUMO.O Rio Mampituba drena umaárea de 1.200 km 2 , nasce na Serra Geral e desemboca no Oceano Atlântico juntoà cidade de Torres, após percorrer cerca de 62 quilômetros. Apresenta vazão média de 18,6 m 3 .s -1 , profundidade média de 4 m e está sob regime de micromarés. Em 17 de maio de 2008 foi realizada uma campanha durante dois ciclos de maré (25 horas), quando foram registrados dados de correntes, salinidade e concentração de sedimentos em suspensão. Durante a campanha o nível deágua no estuário do Rio Mampituba mostrou tendência de diminuição e a altura da maré foi de 0,4 m, apresentando assimetria com predominância de enchente. O padrão de correntes no estuário foi bidirecional, com velocidade média de vazante de 0,33 e enchente de 0,13 m.s -1 . A estratificação no estuário acompanhou a subida da maré, com um avanço da cunha salina até aproximadamente 5 km estuário adentro. O transporte de sal total no estuário foi de 1,11 kg.m -1 .s -1 no sentido estuário afora. A componente da descarga fluvial foi responsável por 98% do transporte de sal para fora do estuário, enquanto o transporte estuário adentro teve participação de 51% da circulação gravitacional, 26% da correlação da maré e 19% do bombeamento da maré. O transporte de sedimentos em suspensão foi devido principalmenteà circulação gravitacional, representando 83% do transporte total. A hidrodinâmica do estuário do Rio Mampituba responde como um estuário altamente estratificado dominado pelo rio.Palavras-chave: circulação, transporte advectivo, processos de transporte.

This paper reports the first LIDAR measurements obtained on a fishing pier in Santa Catarina, southern Brazil. A laboratory was built to monitor the vertical structure, time and directional variability of winds in the transitional region between the ocean and the continent. A meteorological station provided pressure, temperature, wind and humidity data. Prevailing winds tend to blow from the NE along the coastline, strongly influenced by the South Atlantic Subtropical High Pressure center. Sea and land breezes had significant amplitude. The offshore wind component (sea breeze) was generally active from 11:00 to 20:00 h; the onshore component (land breeze) from 22:00 to 09:00 h. Weak vertical shear and increasing wind speeds were typically observed in the early afternoon, while stronger shear and the highest wind speeds tend to occur in the late afternoon. Winds profiles from the ocean sector were usually more intense and less sheared. The average power of wind turbines was estimated. The local resource is nearly 2.5 times greater than that of a site located 9.3 km inland. The use of coastal laboratories was demonstrated to be a cost-saving solution for long-term monitoring of the country's wind resources.

A light detection and ranging (LIDAR) wind profiler was used to estimate the wind speed in the southern coast of Santa Catarina State, Brazil. This profiler was installed on a coastal platform 250 m from the beach, and recorded wind speed and direction from January 2017 to December 2018. The power generation from three wind turbines was simulated, to obtain estimations of the average power, energy generation and capacity factor, as well as to assess the performance of a hypothetical wind farm. The scale and shape parameters of the Weibull distribution were evaluated and compared with those of other localities in the state. The prevailing winds tend to blow predominantly from the northeast and southwest directions. Wind magnitudes are higher for the NE and SW ocean sectors where the average wind power density can reach 610–820 W m−2. The Vestas 3.0 turbine spent the largest percentage of time in operation (>76%). The higher incidence of strong northeasterly winds in 2017 and more frequent passage of cold fronts in 2018 were attributed to the cycle of the South Atlantic subtropical high. The results demonstrate a significant coastal wind power potential, and suggest that there is a significant increase of resources offshore.

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This work aims to focus on proposals that could stimulate the development of small scale integrated devices for the global challenge to provide electric energy from renewable alternative resources without major interventions. It presents an evaluation of a small-scale wave energy extraction system that can be installed in marine near shore structures, such as fishing piers. The system is characterized by a small oscillating-water-column (OWC) converter composed by tubes tied to the pillars of the structure. A mathematical model of the OWC device was developed. The model relies on two main components. The first uses linear wave theory to describe the water level variation inside the tube as a result of a wave passing by. The second considers the air flux converted to mechanical torque using Wells turbine equations. The simulations were carried out for different water depths and wave parameters, to evaluate the ratio between the input and output energy throughout the year. For the case study presented in this paper, the performance would be better as long as the device is placed in a position where the waves are less influenced by the bottom friction, but it still has the necessary increment of the wave height.