长江干线航道整治施工期水环境研究分析——湖广—罗湖洲及沙洲水道

Study and Analysis of Water Environment in the Yangtze River Trunk Channel Regulation Construction Period Huguang Luohuzhou and Shazhou Waterways

为明晰长江干线航道整治工程的湖广—罗湖洲及沙洲水道施工期间水环境的变化趋势,2019年4月—2021年2月在湖广-罗湖洲及沙洲水道布设3个监测断面,监测断面悬浮物、化学需氧量、五日生化需氧量、总磷、氨氮单因子指标,依据《地表水资源质量标准》(SL 63-1994)与《地表水环境质量标准》(GB 3838-2002),采用单项指标法评价水环境水质状况与变化趋势。据结果显示,各监测断面在工程施工期间,出现水样超标的情况,但最终各单因子水质都在标准限制范围内,表明项目部分施工区域水上沉排、抛石作业对区域水环境存在一定的影响,然在水体区域沉降及河流自净作用下能够恢复到标准限制范围内。

In order to clarify the change trend of water environment during the construction of Huguang-Luo hu Zhou and Sha Zhou waterways in the main waterway regulation project of the Yangtze River,three sections were laid in Huguang-Luo hu Zhou and Sha Zhou waterways from April 2019 to February 2021 to monitor the single factor indexes of suspended solids,chemical oxygen demand,5-day biochemical oxygen demand,total phosphorus and ammonia nitrogen in the sections,according to “Surface Water Resources Quality Standards” (SL 63-1994) and “Surface Water Environmental Quality Standards” (GB 3838-2002),the status and change trend of water environment and water quality were evaluated by single index method.The final result shows that the monitoring cross section during the period of project construction,presents the overweight individual water situation,but in the end every single factor water quality within the scope of the standard limit,showed that the water subsidence and riprap operation in some construction areas of the project have certain influence on the regional water environment,however,under the regional subsidence,and rivers water self-purification to restore to the standard limit range.