摘要
城市河网区作为复杂水环境系统,相较于普通河流水体对象的污染输入更为广泛,其时空变化更为复杂,而传统预测及评价方法难以对城区河网环境提升效果进行全面准确的综合评估。以宁波市鄞东南平原河网区作为研究对象,分别建立一维河网水动力、污染迁移转化、水生态反应数学耦合模型,并结合宁波市补水规划进行工况模拟,开展能反映河网区水环境、水生态多指标及其空间评价目标的综合评价。结果表明:耦合模型精度较高,能较好反映目标河网区水质变化情况;河网水质改善呈现显著的季节差异,补水方案需着重考虑丰水期与春夏时节水环境的质量情况;通过对不同补水方案的综合评价,发现方案七、九能够满足目标河网区水质的达标要求。
The urban river network regions represent intricate aquatic systems exhibiting intricate characteristics distinct from conventional river bodies.These areas frequently contend with extensive pollution influxes and intricate spatial and temporal variations in their aquatic milieu.Consequently,conventional prognostic and appraisal methodologies have been encountering challenges in accurately and comprehensively gauging the overall efficacy of enhancements within urban river networks.This investigation specifically focuses on the southeast plain river network area within Ningbo City.The study constructs a comprehensive one-dimensional hydrodynamic-pollutant transport-transformation-water ecology coupled model.Leveraging this framework,and in conjunction with the water replenishment strategy of Ningbo City,some scenario simulations are executed to comprehensively appraise the water environment and water ecology of the river network area,including spatial evaluation benchmarks.The results indicate that:the coupling model has high accuracy,which can reflect the changes of water quality in the urban river networks;the improvement of water quality in the river network shows significant seasonal changes,and the water replenishment plan needs to focus on improving the water environment during the abundant water period and spring/summer seasons.This comprehensive evaluation of water replenishment plan suggests that the seventh scheme and the ninth scheme can meet the water quality standards in the target river network area.
作者
王宇萌
程军蕊
王晓
王侃
WANG Yumeng;CHENG Junrui;WANG Xiao;WANG Kan(School of Civil&Environmental Engineering and Geography Science,Ningbo University,Ningbo 315211,China)
出处
《宁波大学学报(理工版)》
2025年第4期104-113,共10页
Journal of Ningbo University:Natural Science and Engineering Edition
基金
浙江省自然科学基金浙江省水利厅联合基金(LZJWY23E090007)。
关键词
城市河网
生态补水
水环境数学模型
水动力水生态耦合
综合评价
urban river networks
ecological water supplementation
mathematical model of water environment
hydrodynamic water ecological coupling
comprehensive evaluation
