中国地理科学 ›› 2018, Vol. 28 ›› Issue (6): 1027-1037.doi: 10.1007/s11769-018-0999-6

• 论文 • 上一篇    下一篇

Seasonal and Spatial Variability of Water Quality and Nutrient Removal Efficiency of Restored Wetland: A Case Study in Fujin National Wetland Park, China

LI Nan1, TIAN Xue2, LI Yu3,4, FU Hongchen3,4, JIA Xueying2, JIN Guangze1, JIANG Ming2   

  1. 1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, China;
    2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural, Chinese Academy of Science, Changchun 130102, China;
    3. Sanhuanpao National Natural Reserve, Fujin 156100, China;
    4. Fujin National Wetland Park Service, Fujin 156100, China
  • 收稿日期:2017-12-11 修回日期:2018-02-06 出版日期:2018-12-27 发布日期:2018-11-01
  • 通讯作者: JIANG Ming.E-mail:jiangm@iga.ac.cn E-mail:jiangm@iga.ac.cn
  • 基金资助:

    Under the auspices of the National Natural Science Foundation of China (No. D41271106), the National Key Research and Development Program of China (No. 2016YFA0602303)

Seasonal and Spatial Variability of Water Quality and Nutrient Removal Efficiency of Restored Wetland: A Case Study in Fujin National Wetland Park, China

LI Nan1, TIAN Xue2, LI Yu3,4, FU Hongchen3,4, JIA Xueying2, JIN Guangze1, JIANG Ming2   

  1. 1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, China;
    2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural, Chinese Academy of Science, Changchun 130102, China;
    3. Sanhuanpao National Natural Reserve, Fujin 156100, China;
    4. Fujin National Wetland Park Service, Fujin 156100, China
  • Received:2017-12-11 Revised:2018-02-06 Online:2018-12-27 Published:2018-11-01
  • Contact: JIANG Ming.E-mail:jiangm@iga.ac.cn E-mail:jiangm@iga.ac.cn
  • Supported by:

    Under the auspices of the National Natural Science Foundation of China (No. D41271106), the National Key Research and Development Program of China (No. 2016YFA0602303)

摘要:

To investigate the spatio-temporal and compositional variation of selected water quality parameters and understand the purifying effects of wetland in Fujin National Wetland Park (FNWP), China, the trophic level index (TLI), paired samples t-test and correlation analysis were used for the statistical analysis of a set of 10 water quality parameters. The analyses were based on water samples collected from 22 stations in FNWP between 2014 and 2016. Results initially reveal that total nitrogen (TN) concentrations are above class V levels (2 mg/L), total phosphorus (TP) concentrations are below class Ⅲ levels (0.2 mg/L), and that all other parameters fall within standard ranges. Highest values for TN, pH, and Chlorophyll-a were recorded in 2016, while the levels of chemical oxygen demand (CODMn) and biochemical oxygen demand (BOD5) were lowest during this year. Similarly, TN values were highest between 2014 and 2016 while dissolved oxygen (DO) concentrations were lowest in the summer and TP concentrations were highest in the autumn. Significant variations were also found in Secchi depth (SD), TN, CODMn (P < 0.01), TP, and DO levels (P < 0.05) between the inlet and outlet of the park. High-to-low levels of TN, TP, and TDS were found in cattails, reeds, and open water (the opposite trend was seen in SD levels). Tested wetland water had a light eutrophication status in most cases and TN and TP removal rates were between 7.54%-84.36% and 37.50%-70.83%, respectively. Data also show no significant annual changes in water quality within this wetland, although obvious affects from surrounding agricultural drainage were nevertheless recorded. Results reveal a high major nutrient removal efficiency (N and P). The upper limits of these phenomena should be addressed in future research alongside a more efficient and scientific agricultural layout for the regions in and around the FNWP.

关键词: restored wetland, water quality, purification, nutrient removal, seasonal and spatial variability, Fujin National Wetland Park (FNWP)

Abstract:

To investigate the spatio-temporal and compositional variation of selected water quality parameters and understand the purifying effects of wetland in Fujin National Wetland Park (FNWP), China, the trophic level index (TLI), paired samples t-test and correlation analysis were used for the statistical analysis of a set of 10 water quality parameters. The analyses were based on water samples collected from 22 stations in FNWP between 2014 and 2016. Results initially reveal that total nitrogen (TN) concentrations are above class V levels (2 mg/L), total phosphorus (TP) concentrations are below class Ⅲ levels (0.2 mg/L), and that all other parameters fall within standard ranges. Highest values for TN, pH, and Chlorophyll-a were recorded in 2016, while the levels of chemical oxygen demand (CODMn) and biochemical oxygen demand (BOD5) were lowest during this year. Similarly, TN values were highest between 2014 and 2016 while dissolved oxygen (DO) concentrations were lowest in the summer and TP concentrations were highest in the autumn. Significant variations were also found in Secchi depth (SD), TN, CODMn (P < 0.01), TP, and DO levels (P < 0.05) between the inlet and outlet of the park. High-to-low levels of TN, TP, and TDS were found in cattails, reeds, and open water (the opposite trend was seen in SD levels). Tested wetland water had a light eutrophication status in most cases and TN and TP removal rates were between 7.54%-84.36% and 37.50%-70.83%, respectively. Data also show no significant annual changes in water quality within this wetland, although obvious affects from surrounding agricultural drainage were nevertheless recorded. Results reveal a high major nutrient removal efficiency (N and P). The upper limits of these phenomena should be addressed in future research alongside a more efficient and scientific agricultural layout for the regions in and around the FNWP.

Key words: restored wetland, water quality, purification, nutrient removal, seasonal and spatial variability, Fujin National Wetland Park (FNWP)