ESTIMATIVA DA RECARGA DAS ÁGUAS SUBTERRÂNEAS NO SISTEMA AQUÍFERO BAURU (SAB)

Estimar os valores de recarga das águas subterrâneas é importante para entender a dinâmica de sistemas aquíferos perturbados por forçantes climatológicas e pelo uso e ocupação da terra. Este trabalho estimou as taxas de recarga das águas subterrâneas pelo método da variação da superfície livre em área do Sistema Aquífero Bauru (SAB) para a Estação Ecológica e na Floresta Estadual de Santa Barbara nos anos hidrológicos 2014/2015 e 2015/2016. Durante esse período a região passou por dois períodos climáticos distintos: um ano considerado normal (com taxas de precipitação em torno da média histórica dos últimos 30 anos) seguido de um ano com a presença do fenômeno ENOS (El Niño Oscilação Sul) aumentando a precipitação em 35,44% quando comparado ao ano anterior. Os resultados demonstraram, apoiados na espacialização do fenômeno pela área estudada, que apesar das diferenças nas taxas de precipitação, o percentual de recarga foi o mesmo para os dois anos, não evidenciando diferenças entre as áreas com vegetação de Cerrado e reflorestamentos com espécies exóticas como Pinus e Eucalipto

Baseflow and water resilience variability in two water management units in southeastern Brazil

Changes in climate and water demand in densely populated regions increasingly affect hydrological systems, and, in turn, impact socioeconomic conditions. In this case study, we identify how the hydrogeological frameworks of two water resource management units, Tietê-Jacaré (TJ) and Piracicaba-Capivari-Jundiaí (PCJ) in Sao Paulo state (Brazil), control the baseflow processes and resilience in the face of streamflow fluctuations in response to anthropogenic activities and climate variation. The results reveal between 40% and 75% contributions of baseflow to total streamflow in basins overlying crystalline and sedimentary aquifers. The basins in PCJ which mostly overly crystalline aquifers, have shorter water residence times and greater dependence on surface water. Therefore, streamflow in the PCJ basins is vulnerable during the drought period and the management model affected the water resilience of the basins (transfer of water to Cantareira System). The TJ basins have greater streamflow contributions from aquifer discharge linked to the presence of important sedimentary aquifers, which improves resilience under changing rainfall patterns, these basins present a more stable situation of resilience. Ultimately, the two management units require different planning strategies with adaptive and dynamic actions to mitigate the social, economic, and environmental effects caused by the variability and reduction of water sources

A rare case of primary breast angiosarcoma in a male: a case report

Abstract Background Sarcomas account for less than 1% of primary breast cancers, and breast angiosarcomas are responsible for only 0.05% of all breast malignancies. The male breast has the same potential for malignant transformation as the female breast. However, due to anatomical differences in the breast and the low incidence of angiosarcoma, it is difficult to determine how male breasts can be affected by this type of tumor. Case presentation A 36-year-old male patient was admitted to the hospital with a palpable lump in his right breast. Lymphadenopathy was negative. Ultrasonography showed a hypoechoic mass with partially defined contours, measuring 4.0 × 3.0 cm, with muscle infiltration. Histological examination revealed a malignant tumor. Radical mastectomy was then performed with clear surgical margins. The patient began chemotherapy with paclitaxel. Following the second cycle of chemotherapy, he presented with headache and seizures due to a frontal lobe metastasis. Twenty days after the onset of neurological symptoms, the patient died. Conclusions Primary angiosarcomas of the male breast are extremely rare. This is the sixth case published in the literature. It is in agreement with other studies in the literature concerning clinical presentation and poor prognosis. Treatment consists in surgical removal of the tumor with clear margins and without axillary lymphadenectomy