Volume 9 Issue 6
Nov.  2019
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Article Navigation >  Journal of Environmental Engineering Technology  > 2019  >  9(6): 692-700
XIE Pei, GAO Feng, WANG Shuhang, ZHANG Bo, QIAO Fei, HE Chuan, ZHANG Le. Study on the influence of inflowing rivers on the water quality of Qiandao Lake: taking CODMn as an example[J]. Journal of Environmental Engineering Technology, 2019, 9(6): 692-700. doi: 10.12153/j.issn.1674-991X.2019.04.300
Citation: XIE Pei, GAO Feng, WANG Shuhang, ZHANG Bo, QIAO Fei, HE Chuan, ZHANG Le. Study on the influence of inflowing rivers on the water quality of Qiandao Lake: taking CODMn as an example[J]. Journal of Environmental Engineering Technology, 2019, 9(6): 692-700. doi: 10.12153/j.issn.1674-991X.2019.04.300
shu

Study on the influence of inflowing rivers on the water quality of Qiandao Lake: taking CODMn as an example

doi: 10.12153/j.issn.1674-991X.2019.04.300

  • 1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 2. College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China

  • 3. National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 4. Lake Environmental Research Institute, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

More Information
  • Corresponding author: Fei QIAO E-mail: qiaofei@craes.org.cn
  • Received Date: 2019-02-11
  • Publish Date: 2019-11-20
    Abstract
  • Based on the measured data of CODMn in the key monitoring sections of Qiandao Lake, a two-dimensional water quality model for Qiandao Lake based on the Environmental Fluid Dynamics Code (EFDC) Model was established. The influence of inflow CODMn from upstream and the inflows around the lake on the CODMn in inner Qiandao Lake were analyzed by various scenarios. The response relation between the boundary CODMn and the CODMn at key monitoring sections in the lake was analyzed, and the influence and contribution of the upstream inflow CODMn variation on the CODMn of the key monitoring sections in the lake were quantified. Results showed that the comprehensive degradation coefficient (k)of CODMn in Qiandao Lake was 0.001 5, according to the parallel simulation of several constant degradation coefficients. There existed an obvious response relation between the upstream inflow CODMn and CODMn in the key monitoring sections. When the upstream inflow CODMn was 6 mg/L, CODMn between Weipinglinchang to Santandao sections exceeded Grade Ⅱ water quality standard of Surface Water Environmental Quality Standards (GB 3838-2002). Meanwhile, simulated results showed that the response coefficients of upstream inflows were obviously larger than that of inflows around the lake. The contribution rate of upstream inflows to CODMn in key monitoring sections of Weipinglinchang, Xiaojinshan, Santandao and Dabaqian was 82.0%-92.3%, 73.8%-88.2%, 53.8%-62.8% and 57.7%-76.4% , respectively. The impact of CODMn on key monitoring sections from upstream inflows was greater than the inflows around the lake. The results indicated that upstream inflows were the main factors affecting the CODMn of the key monitoring sections in Qiandao Lake. Therefore, the water quality monitoring and pollutant control should be strengthened for upstream inflows.

     

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