Temporal and spatial distribution characteristics of nitrogen and phosphorous in the water of Qionghai Lake, Sichuan Province and their response to ecological environment

被引：0
作者：
Shi Y. [1 ,2 ]
Zhang L. [1 ,2 ]
Qin Y. [1 ,2 ]
Ma Y. [1 ,2 ]
Yang C. [1 ,2 ]
Liu Z. [1 ,2 ]
Zhu H. [3 ]
机构：
[1] State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing
[2] Institute of Water Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing
[3] Environmental Technology Engineering Co., Ltd, China Academy of Environmental Sciences, Beijing
来源：
Earth Science Frontiers | 2023年 / 30卷 / 02期
关键词：
chlorophyll-a; eutrophication; nitrogen; phosphorus; Qionghai Lake; temporal and spatial distribution;
D O I：
10.13745/j.esf.sf.2022.2.86
中图分类号：
学科分类号：
摘要：
The aim of this article was to explore the characteristics of nitrogen and phosphorus pollution in the Qionghai Lake. We analyzed the temporal and spatial distribution characteristics of TN, NH+4 -N and TP concentrations of water samples from 11 lake sampling sites in 2020. The relationships between nitrogen/phosphorus and chlorophyll-a concentrations were discussed, and the eutrophication status of the Qionghai Lake was evaluated in order to strengthen the prevention and control of lake eutrophication and ensure the safety of the lake water source. The results showed that TN concentrations ranged from 0.315-0.500 mg.L-1, with a mean value of 0.399 mg.L-1, and NH4+-N concentrations ranged from 0.063-0.171 mg.L- 1, with a mean value of 0.098 mg.L-1, both meeting the standard for grade II surface water of lake and reservoir; while TP concentrations also met the standard, with a range of 0.019-0.035 mg.L-1 and a mean value of 0.023 mg.L- 1. Both nitrogen and phosphorus concentrations in the Qionghai Lake show temporal and spatial differences: TN, NH+4-N and TP concentrations varied significantly with time and were higher in dry season than in wet season; they have similar spatial distribution patterns, with high concentration areas mainly observed at station 1 (Haihekou) and 10 (Gaojian Bay) in the northwestern part of the lake, and were all higher in the northwest than in the east of the lake. The average TN/TP ratio was higher in the dry season, characterized by phosphorous limitation, than in the wet season, characterized by nitrogen and phosphorus limitation. TN, TP and NH+4-N concentrations positively correlated with Chla concentration, indicating nitrogen and phosphorous could promote the algae growth. Evaluation of eutrophication in the Qionghai Lake showed that the average trophic status index (TSI) value for the lake was 38.011; and the study area was in a mesotrophic state as a whole, with a higher TSI value for the northwest and a lower TSI value for the east. © 2023 Science Frontiers editorial department. All rights reserved.
引用
收藏
页码：495 / 505
页数：10
相关论文
共 7 条
  • [1] ZHANG Y., CHENG L, LI K Y, Et al., Nutrient enrichment homogenizes taxonomic and functional diversity of benthic macroinvertebrate assemblages in shallow lakes[J], Limnology and Oceanography, 64, 3, pp. 1047-1058, (2019)
  • [2] ZHANG Y L, LIU X H, QIN B Q., Et al., Aquatic vegetation in response to increased eutrophication and degraded light climate in Eastern Lake Taihu<sub>:</sub> implications for lake ecological restoration, Scientific Reports, 6, (2016)
  • [3] SNDERGAARD M, JENSEN J P., JEPPESEN E., Role of sediment and internal loading of phosphorus in shallow, Hydrobiologia, 506, 1, pp. 135-145, (2003)
  • [4] NASH D M, HALLIWELL D J., Tracing phosphorus transferred from grazing land to water, Water Research, 34, 7, pp. 1975-1985, (2000)
  • [5] AL BAKRI D, RAHMAN S., BOWLING L., Sources and management of urban stormwater pollution in rural catchments, Australia, Journal of Hydrology, 356, 3, pp. 299-311, (2008)
  • [6] YAN X., CAI Z, YANG R., Et al., Nitrogen budget and riverine nitrogen output in a rice paddy dominated agricultural watershed in eastern China[J], Biogeochemistry, 106, 3, pp. 489-501, (2011)
  • [7] GUILDFORD S, HECKY R., Total nitrogen, total phosphorus, and nutrient limitation in lakes and oceans: is there a common relationship?, Limnology and Oceanography, 45, 6, pp. 1213-1223, (2000)
1