Abstract

The geothermal and hydrochemical parameters of a large hydrogeothermal system located in the city of Velingrad and its environs (southwestern Bulgaria) are discussed. The article summarizes the results of its research, including those obtained by 2019. Temperature of the discharging thermal waters varies from 37 to 94°C. The hotter mineral waters have SO₄–HCO₃/Na composition with pH ≈ 8.0, while the less hot ones are of HCO₃–SO₄/Na composition with pH up to 9.6. The geothermal and geochemical features of various parts of the system are revealed, indicating an increase in the mineralization of thermal water with increasing temperature.

中文翻译：

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韦林格勒水热系统（保加利亚）：地球化学特征和热量输出

摘要

讨论了位于韦林格勒市及其周围地区（保加利亚西南部）的大型水文地热系统的地热和水化学参数。本文总结了其研究结果，包括到2019年获得的结果。排出的热水的温度范围为37至94°C。较热的矿泉水具有pH≈8.0的SO ₄ -HCO ₃ / Na组成，而较冷的矿泉水具有pH高达9.6的HCO ₃ -SO ₄ / Na组成。揭示了系统各个部分的地热和地球化学特征，表明热水的矿化度随温度升高而增加。