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Simulation Study on the Optimisation of Replenishment of Landscape Water with Reclaimed Water Based on Transparency

Author

Listed:
  • Dong Ao

    (College of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China)

  • Lijie Wei

    (College of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China)

  • Liang Pei

    (Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Chengguo Liu

    (China National Chemical Urban Investment Company Limited, Xi’an 710048, China)

  • Liming Wang

    (College of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China)

Abstract

Water-scarce cities have fewer surface water (SW) resources available for ecological use, causing landscape water to deteriorate due to water shortage and fail to perform their intended landscape functions. As a result, many cities use reclaimed water (RW) to replenish them. However, this could cause concern among the people, as RW usually has higher nutrient concentrations, which may stimulate algae growth and deteriorate the aesthetic senses of the receiving water bodies. In order to assess the feasibility of using RW for this purpose, this study used Xingqing Lake in Northwest China as insight into the effect of RW replenishment on the visual landscape quality of urban landscape water. Water transparency (measured by SD) is used as an intuitive indicator to reflect the comprehensive influence of suspended solids and algae growth on the water’s aesthetic quality. Scenario analyses were carried out after calibrating and validating one-year data in MIKE 3 software with both SD and algae growth calculations, and the results showed that the low concentration of suspended matter in RW could compensate for the decrease in SD due to algal blooms caused by high concentrations of nitrogen and phosphorus, and the effect on SD is especially pronounced under conditions that are not conducive to algal growth, such as good flow conditions and low temperature. In addition, to meet a SD ≥ 70 mm, the total water inflow required can be significantly reduced with the optimal application of RW. It is also indicated that partial or complete utilization of RW to replace SW for replenishing the landscape water could be feasible from the viewpoint of landscape quality, at least for the landscape water investigated in this study. This can provide a method for the improvement to urban water management practices by using RW for replenishment in water-scarce cities.

Suggested Citation

  • Dong Ao & Lijie Wei & Liang Pei & Chengguo Liu & Liming Wang, 2023. "Simulation Study on the Optimisation of Replenishment of Landscape Water with Reclaimed Water Based on Transparency," IJERPH, MDPI, vol. 20(5), pages 1-15, February.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:5:p:4141-:d:1080375
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    References listed on IDEAS

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    1. Junzhi Zhang & Xiao He & Huixin Zhang & Yu Liao & Qi Wang & Luwei Li & Jianwei Yu, 2022. "Factors Driving Microbial Community Dynamics and Potential Health Effects of Bacterial Pathogen on Landscape Lakes with Reclaimed Water Replenishment in Beijing, PR China," IJERPH, MDPI, vol. 19(9), pages 1-12, April.
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