海绵城市建设规划中水环境容量研究
2021-08-24庞洁李特
庞洁 李特
摘 要:水环境功能区水质改善与达标是建设海绵城市的一项重要目标,其核心手段是将污染物总量控制在水环境容量允许的范围之内。本文以迁安市海绵城市建设为例,将水污染负荷削减至水环境容量之内作为基本要求,计算出试点面源污染削减率的目标,制定有针对性的海绵城市建设规划措施,以实现各分区污染物减排和水质达标的目的。
关键词:海绵城市;水环境容量;负荷削减;水质
中图分类号:X824文献标识码:A文章编号:1003-5168(2021)10-0114-03
Study on Water Environmental Capacity of Sponge City Construction Plan
PANG Jie LI Te
(Yangling Vocational and Technical College,Yangling Shaanxi 712100)
Abstract: The improvement and standard of water quality in the water environment functional area is an important goal of building sponge city. The core means is to control the total amount of pollutants within the allowable range of water environment capacity. Taking the sponge city construction of Qian'an city as an example, the paper took the water pollution load reduction to the water environment capacity as the basic requirement, calculated the target of the pilot non-point pollution reduction rate, and formulated the targeted sponge city construction planning measures to achieve the goal of pollutant emission reduction and water quality standard in each district.
Keywords: sponge city;water environment capacity;load reduction;water quality
海绵城市建设是城市发展理念和建设方式转型的新途径之一。2013年12月,习近平总书记在中央城镇化工作会议上指出:“建设自然积存、自然渗透、自然净化的海绵城市。”海绵城市,指城市能够像海绵一样,在适应环境变化和应对自然灾害等方面具有良好的“弹性”,下雨时吸水、蓄水、渗水、净水,需要时将蓄存的水“释放”并加以利用。海绵城市建设遵循生态优先等原则,将自然途径与人工措施相结合,在保障城市排水防涝安全的前提下,最大限度地实现雨水在城市区域的积存、渗透和净化,促进雨水资源的利用和生态环境保护。环境功能区水质达标是海绵城市建设的重要目的之一,控制入河污染物总量在水环境容量允许的范围之内是实现水质达标的重要手段。水环境容量是在给定水域范围和水文条件、规定排污方式和水质目标的前提下,单位时间内该水域最大允许纳污量[1]。污染物总量小于水环境容量限值是水环境质量是否达标的关键指标。……
