十堰市犟河流域综合治理及工程实践

Watershed Management and Engineering Practice of Jiang River Basin in Shiyan, Hubei Province

十堰市是南水北调中线工程的核心水源区。犟河作为十堰市五河之一,其水环境质量的好坏,对调水水质安全有着重要影响。在综合治理前,犟河水质长期处于劣V类。犟河流域综合治理措施包括人工快渗(Constructed Rapid Infiltration, CRI)工艺、人工湿地技术、河道生态修复技术等。综合治理工程实施后,自2012年以来连续三年的水质监测结果表明,重点污染指标化学需氧量、氨氮、总磷等下降明显,河流水质明显改善,总体上达到阶段水质治理目标。犟河流域综合治理成效显著,可为其它地区流域治理提供参考和借鉴。

Jiang River plays a vital role in the Central Route of South-to-North Water Diversion Project because of its ecological environment and location advantage. Its river water has been classified as worse than Grade V according to Environmental Quality Standard for Surface Water (GB 3838-2002) in China before the integrated watershed management project, which was regarded unsuitable for any use. Integrated management techniques include the constructed rapid infiltration (CRI) system, constructed wetland, and river ecological restoration techniques. After the implementation of the project, the key water quality parameters (COD, NH3-N, and TP) of the Danjiangkou Reservoir inflow have significantly decreased for three consecutive years since 2012, and overall achieved the phased goals. The integrated watershed management and engineering practice of Jiang River Basin has accomplished a remarkable achievement, which will provide experience and demonstration for similar watersheds in other regions.