| 张迎颖,闻学政,李敏,徐佳兵,宋雪飞,姜智绘,刘海琴,王岩,张志勇.农村汇水河浜生态修复组合工程处理效果分析[J].农业环境科学学报,2023,42(7):1563-1575. |
| 农村汇水河浜生态修复组合工程处理效果分析 |
| Removal efficiency of pollutants in the rural catchment branch by the combined engineering of ecological restoration |
| 投稿时间：2022-08-09 |
| DOI：10.11654/jaes.2022-0804 |
| 中文关键词: 生态修复组合工程 农村汇水河浜 菜地径流 氮 磷 |
| 英文关键词: combined engineering of ecological restoration rural catchment branch rainfall runoff from the vegetable field nitrogen phosphorus |
| 基金项目:江苏省农业科技自主创新资金项目（CX（19）1007）；国家重大科技专项水体污染控制与治理专项（2017ZX07202004-07）；国家重点研发计划项目（2021YFD1700805-02） |
| 作者 | 单位 | E-mail | | 张迎颖 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014
江苏大学环境与安全工程学院, 江苏 镇江 212013 | | | 闻学政 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014 | | | 李敏 | 江苏大学环境与安全工程学院, 江苏 镇江 212013 | | | 徐佳兵 | 常州市武进区前黄水利(务)站, 江苏 常州 213172 | | | 宋雪飞 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014 | | | 姜智绘 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014 | | | 刘海琴 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014 | | | 王岩 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014 | | | 张志勇 | 江苏省农业科学院农业资源与环境研究所, 农业农村部长江下游平原农业环境重点实验室, 南京 210014
江苏大学环境与安全工程学院, 江苏 镇江 212013 | jaaszyzhang@126.com |
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| 中文摘要: |
| 为有效削减农村集中居住区汇水河浜的污染物，在常州市武进区前黄镇运村村新运小桥浜东北侧次级支浜构建“前置库-湿地塘-生态沟”的生态修复组合工程，并沿水流方向采集水样（平枯水期 7次、丰水期 7次），监测主要水质指标，包括水温、pH、溶解氧（DO）、总氮（TN）、氨氮（NH+4-N）、硝氮（NO-3-N）、总磷（TP）、磷酸盐（PO3-4-P）、化学需氧量（COD）和悬浮物（SS），计算各污染物的沿程总削减率，分析各工艺段的污染通量，估算组合工程对于该次级支浜污染负荷的年削减量。结果表明：在平枯水期，组合工程主要依靠物理沉降、透水坝拦截等作用削减颗粒态污染物；在丰水期，组合工程主要依靠植物吸收、微生物降解等作用削减溶解态污染物。生活污水和分散菜地对于TN、TP污染负荷的贡献较大；生活污水对COD污染负荷的贡献最大。次级支浜水体氮素中NO-3-N含量较高，磷素中颗粒态磷（PP）含量较高。组合工程对次级支浜陆源污染中TN、TP和COD污染负荷的年削减量分别为 166.23、20.07、502.66 kg·a-1。研究表明，生态修复组合工程能够削减部分污染负荷，今后仍须加强来自生产、生活的陆源污染拦截，以及汇入新运小桥浜之后的水体原位净化。 |
| 英文摘要: |
| To reduce the pollutants in a catchment branch in a rural residential area, a combined engineering project of ecological restoration consisting of a pre-reservoir, wetland pond, and ecological ditch was constructed in the secondary branch on the northeast of Xinyunxiaoqiaobang Branch in Yuncun Village, Qianhuang Town, Changzhou City. Water samples were collected 7 times in the regular and dry seasons and 7 times in the flood season. The physical and chemical indexes of water samples, including water temperature, pH, dissolved oxygen（DO）, total nitrogen（TN）, ammonia nitrogen（NH+4-N）, nitrate nitrogen（NO-3-N）, total phosphorous（TP）, phosphate（PO3-4-P）, chemical oxygen demand（COD）, and suspended solids（SS）, were monitored to analyze the total removal rates of pollutants, assess pollutant flux of the three process sections, and estimate the pollution load reduction by the engineering. The results showed that in the regular and dry seasons, physical settlement and permeable dam interception primarily removed the particulate pollutants in water, while in the flood season, plant absorption and microbial degradation removed the dissolved pollutants from the water. The pollution loads of TN and TP were mainly due to rural domestic sewage and scattered vegetable fields. In contrast, the pollution loads of COD mainly came from rural domestic sewage. In the secondary branch water, the proportion of NO-3-N was higher than NH+4-N in nitrogen, and the proportion of particulate phosphorus（PP）was higher than PO3-4-P in phosphorus. The combined engineering annually reduced the TN, TP, and COD from land-based sources by approximately 166.23, 20.07 kg·a-1 and 502.66 kg·a-1, respectively. Even though the combined engineering of ecological restoration reduced the pollutant load partially, the interception of terrigenous pollutants from production and life and in-situ water purification in the Xinyunxiaoqiaobang Branch should be enhanced. |
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