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| DOI：10.13522/j.cnki.ggps.2022139 |
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| Comparative Analysis of Hydrochemical Characteristics of Reservoirs with Different Geological Backgrounds in Guangxi |
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LI Liju, TANG Xiangling, LI Ziwei
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Guilin University of Technology, Guilin 541000, China)
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| Abstract: |
| 【Background】With the development of China’s economy, the phenomenon of water shortage will become more and more serious, and the amount of water supply in reservoirs will increase day by day, it is of great significance to carry out ecological research on reservoirs in China and improve the water quality of reservoirs . Water chemistry research is an important part of water resources quality evaluation, which is of great significance to the use of water resources, sustainable development, management methods and the construction and protection of ecological environment.【Objective】In order to study the difference of hydrochemical characteristics of reservoirs with different geological backgrounds in Guangxi and their response to human activities, the hydrochemical test data of Qingshitan reservoir and Dalong Dong reservoir, which are mainly non-karst areas, were used in August 2021.【Method】The hydrochemical characteristics and influencing factors of two typical reservoirs with different geological backgrounds were analyzed by using Piper trigram and correlation analysis. 【Result】The results showed that the main anions of Qingshitan reservoir, a typical non-karst reservoir, were SO42- and Ca2++Mg2+, while the hydrochemistry of Dalong Dong reservoir, a typical karst reservoir, was Ca-HCO3 type, and HCO3- and Ca2+ were the main anions. The main ions showed consistent spatial variation. As the reservoir depth deepens, the main ion concentration of the reservoir water gradually decreased, mainly affected by the change of flow. 【Conclusion】The hydrochemical characteristics of the reservoir are mainly derived from the differentiation and dissolution of rocks in the reservoir. While SO42- and NO3- are mainly affected by human activities and atmospheric precipitation, dalongdong Reservoir is more significantly affected by human activities. Finally, according to the problems in the reservoir, the suggestions and measures of reservoir water resources protection are put forward. |
| Key words: hydrochemical characteristics; influencing factors; Qingshitan Reservoir; Dalongdong Reservoir |
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