摘要
针对城市内湖富营养化频发,导致水体生态安全遭到严重危害的问题,以西安市汉城湖为例,通过水动力和富营养化模型,借助边界条件的情景模拟,分析水质恶化原因并提出水质改善方案。结果表明:参数率定后模型拟合度高于0.8,较好地模拟了湖体水质的演变规律,湖体藻类生长受外界环境和营养物质影响,且无机磷对其生长起到重要作用;对水质改善措施效果较好的分别为净化补水水质、加大补水量、增加大型植物种植和浮游动物对藻类的捕获。结合实际情况,可通过调节补水水量、采取引水渠道的生态净化措施和生物操纵组合方案,保障汉城湖水质目标。当补水量不充足时,可将其水力停留时间控制在35 d为最优。
Aiming at the problem of frequently occurred eutrophication in urban inner lakes and the serious harm to their ecological security,we took Hancheng Lake in Xi'an as the research object,used hydrodynamic and eutrophication models,and scenario simulation analysis of boundary conditions to analyze the causes of water quality deterioration and proposed water quality improvement plans.The results indicate that the model has a good fit with a coefficient higher than 0.8 after parameter calibration,and can effectively simulate the evolution of the water quality.The scenario simulations reveal that algal growth is influenced by both external environmental factors and nutrient substances,with nutrient substances(particularly inorganic phosphorus)having a greater impact.The most effective measures for water quality improvement include purifying water quality in source water,and increasing the amount of water replenishment,macrophyte cultivation and the capture of algae by zooplankton.Given the actual situation,a combination of adjusting the amount of water replenishment,adopting eco-purification measures through water diversion channels,and implementing biological manipulation can guarantee the water quality of Hancheng Lake.Moreover,when the water replenishment is insufficient,the optimal hydraulic residence time should be controlled at 35 days.
作者
高婷婷
蔡传尊
陈洋洋
刘成国
敖冬
GAO Tingting;CAI Chuanzun;CHEN Yangyang;LIU Chengguo;AO Dong(School of Environmental and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,China;China National Chemical Urban Investment Co.Ltd.,Xi’an 710054,China)
出处
《西安工程大学学报》
CAS
2024年第2期52-60,共9页
Journal of Xi’an Polytechnic University
基金
陕西省自然科学基础研究计划(2021JQ-684)
陕西省教育厅专项科研计划项目(21JK0665)。
