里运河水生态状况评价及保护对策

Assessment of aquatic ecology status of Li Canal and its protection strategies

河流的水生态状况对维护生物多样性和可持续发展具有重要的意义。结合区域自然环境准确评价河流水生态状况,可以为河流生态保护提供科学依据。依据江苏省地方标准生态河湖状况评价规范,评价2017—2020年里运河水生态状况。结果显示:1)近4年来里运河水生态状况总体评价为“良”,水生态状况有变好的趋势;2)评价等级为“良”和“优”的指标主要在水安全、水生物和水生境层面上,8个指标中,有5个指标达到“优”,2个指标为“良”;在水空间层面上,管理(保护)范围划定率达到100%;公众满意度由2017—2018年的“中”提升至2019—2020年的“优”;3)岸线利用管理指数评价等级为“中”,综合治理指数没有明显的提高。根据评价结果,需要加强对里运河的水质保护,合理开发利用岸线,并完善河道管理体制机制,加强执法队伍建设。

The status of river ecology plays an important role in maintaining biodiversity and sustainable development.An accurate assessment of the aquatic ecology status of rivers in the context of the regional natural environment can provide a scientific basis for protecting river ecology.The aquatic ecology status of the Li Canal during 2017-2020 was evaluated according to the local standard for ecological river and lake status of Jiangsu Province.The aquatic ecology status of the Li Canal is“Good”,with an improving trend during the study period.The indicators rated as“Good”and“Excellent”are mainly those in the aspects of water security,aquatic organism and aquatic habitat.Five of the eight indicators reach“Excellent”,and two are rated as“Good”.For the indicators in aquatic space aspect,the management(protection)boundary delineation rate is 100%.Public Satisfaction has been improved from“Moderate”in 2017-2018 to“Excellent”in 2019-2020.The shoreline use management index rating is“Satisfactory”,with no significant improvement in the overall governance index.Our assessment results imply that it is necessary to strengthen water quality protection,to rationalize the development and utilization of the shoreline,to improve the institutional mechanism for river management and to strengthen the construction of law enforcement teams in the Li Canal.