| Cite this article: | 张岩,王楠,赵同国,等.冰封对乌梁素海水质污染特征的影响[J].灌溉排水学报,0,():-. |
| zhangyan,wang nan,zhao tongguo,et al.冰封对乌梁素海水质污染特征的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 1358Times Download 0Times |
|
|
|
| DOI： |
|
| Influence of the Ice-covered Period on the Water Pollution Characteristics of the Ulansuhai Lake |
|
zhangyan1, wang nan2, zhao tongguo2, li weiping3, tian yepeng4, yuan lingfei5
|
|
1.烟台大学土木工程学院;2.School of Civil Engineering, Yantai University;3.College of Energy and Environment, Inner Mongolia University of Science and Technology;4.Yantai University Trier Institute of Technology for Sustainable Development;5.Yantai Taoziwan Wastewater Treatment Co.
|
| Abstract: |
| 【Objective】In order to clarify the characteristics of water quality pollution during the ice-covered period of the Ulansuhai Lake and reveal the influence of ice-cover on the water quality class of the lake.【Method】In January 2021, 10 sampling sites were deployed in Ulansuhai Lake to collect ice and under-ice water samples. With reference to the Environmental Quality Standard for Surface Water (GB 3838-2002) and the pollution characteristics of the Ulansuhai Lake, the CODMn, NH3-N, TP, TN, fluoride and copper of each sample were measured. Water quality during the ice-covered and non-ice covered period of the Ulansuhai Lake were assessed by the single factor water quality identification index, comprehensive water quality identification index and principal component analysis method. 【Result】Single factor water quality identification index of each target pollutant is under-ice water during the ice-covered period ≥ water during non-ice covered period ≥ ice melt water during the ice-covered period. The pollution degree of the six target pollutants was in the order of TN>TP>CODMn>NH3-N> copper > fluoride. The pollutants that changed in water quality class were CODMn, NH3-N and TN. The comprehensive water quality identification index results for all sampling sites during the ice-covered period were worse than during the non-ice covered period. Sampling site I12 deteriorated from Class II to Class III. The water quality class of other sampling points did not change, but their concentrations were closer to the lower limit of the corresponding water quality class. NH3-N, TN and TP have great influence on the water quality of Ulansuhai Lake. Higher N and P values will bring potential risks for eutrophication of Ulansuhai Lake. The order of water quality in the lake area is spatially changing from outlet area >middle lake area > inlet area. 【Conclusion】During the ice-covered period, target pollutants were ejected to water during the period of ice growth, which increases the concentration of pollutants in the under-ice water. It aggravates the deterioration of the water quality of Ulansuhai Lake. The freezing effect has brought a severe challenge to the management of lake water environment during the ice-covered period. |
| Key words: Ulansuhai Lake; icing effect; water quality evaluation; principal component analysis method; water quality identification index |
|
|
|
|
|
|
