Avaliação dos Parâmetros Hidrometeorológicos na Bacia do Rio Sorocaba/SP

Abstract

ResumoO entendimento do ciclo hidrológico auxilia no processo de planejamento dos recursos hídricos, em projetos de obras hidráulicas e estudos ambientais. Neste trabalho foi realizada a avaliação dos parâmetros hidrometeorológicos e a quantificação do volume de água em cada uma das principais fases do ciclo hidrológico, permitindo a proposição de um modelo de circulação da água na bacia hidrográfica do rio Sorocaba-SP. Os parâmetros foram estimados com base na equação do balanço hídrico, nos dados históricos de chuva, temperatura e vazão da rede hidrometeorológica existente e nas informações dos processos de outorga de concessão de uso dos recursos hídricos. Considerando-se que a vazão média anual no exutório da bacia acrescida da vazão consumida corresponde ao excedente hídrico do balanço, a diferença entre o valor estimado e o observado foi inferior a 10%. A vazão média anual no exutório da bacia somada a vazão consumida foi 63,9 m 3 s -1 , o que corresponde à 25% do volume de chuva anual média. O excedente hídrico estimado foi de 56,5 m 3 s -1 , a ETP 1.011 mm ano -1 e a ETR 999 mm ano -1 , adotando-se uma CAD de 25 mm. Essas informações contribuem para o planejamento do uso dos recursos hídricos na bacia. Palavras-chave: gestão de recursos hídricos; hidrologia; balanço hídrico. Evaluation of the Hydrometeorological Parameters on Sorocaba RiverWatershed -SP AbstractUnderstanding the water cycle assists in the planning process of water resources, in projects of hydraulic works and environmental studies. This work was performed the evaluation of hydrometeorological parameters and the quantification of water flow in each of the major phases of the hydrological cycle, allowing the proposal of a circulation model of the water on Sorocaba river watershed-SP. The parameters were estimated by water balance equation, the historical datas of rainfall, temperature and flow of hydrometeorological network and information in the process of use concession of the water resources. Considering that the average annual flow in the river mouth more flow of consumed water corresponds to the sheet surplus, the difference between results estimated and observed was less than 10%. The average annual flow in the watershed more consumed flow was 63.9 m 3 s -1 , which corresponds to 25% of the average annual rainfall volume. Estimated water surplus was 56.5 m 3 s -1 , ETP 1,011 mm year -1 and ETR 999 mm year -1. This information contributes to planning the use of water resources in the watershed.

Potential of the retention capability of a Neotropical reservoir (São Paulo State, Brazil)

“…It is characterized by the occurrence of a very rainy and hot season, between October and March, when more than 70% of the volume of rainfall is concentrated. The dry season (between April ans September) is cold with little rain (Abreu & Tonello, 2017). In the period 1991-2020, the average monthly rainfall in the region (State of São Paulo) is 120.6 mm (± 86.2 mm); on average, July and August are the months with the lowest rainfall (monthly accumulated averages: 26.8 and 23.7 mm, respectively) and December and January with the highest (228.3 and 286.6 mm, respectively).…”

Land use, spatial heterogeneity of organic matter, granulometric fractions and metal complexation in reservoir sediments

“…The reservoir has a drainage area of 936.5 km 2 with a length of 26 km in the principal channel, a maximum flow of 39.13 m 3 s -1 and a maximum volume of 286 million of m 3 (Rosa et al, 2015). According to the Köppen classification, this region has a Cwb (Altitude subtropical) climate, with rainy summer and stivation peaks during winter, the mean annual precipitation is 1360 mm (Abreu & Tonello, 2017).…”