【摘要】 基于综合型农田退水生态治理工程中的氨氮（NH₃-N）和总磷（TP）水质在线监测数据，结合农业生产活动情况和降水数据，考察了该生态治理工程中氨氮和总磷的降解时效以及农业生产活动对降解时效的影响，最终为工程运维管理提出排水或预先降低水位的时间节点建议。研究结果表明：在本综合型农田退水生态治理工程中，氨氮的降解时效显著短于总磷，农业生产活动对氨氮和总磷降解时效有显著影响，施用尿素会延长两者的降解时间。通常情况下，降水后约181.5 h,进行排水或预降工程水位能有效降低对地表水带来的环境风险。更多还原

【Abstract】 This paper examines the degradation efficiency of ammonia nitrogen and total phosphorus in an integrated ecological remediation project for agricultural drainage water, based on online water quality monitoring data of ammonia nitrogen and total phosphorus. It also considers agricultural production activities and precipitation data. The study investigates the impact of these activities on the degradation efficiency and ultimately suggests time points for engineering drainage or pre-declining water levels for operational management. The results indicate that in this integrated ecological remediation projects, the degradation efficiency of ammonia nitrogen is significantly shorter than that of total phosphorus. Agricultural production activities significantly affect the degradation efficiency of both ammonia nitrogen and total phosphorus, with the application of urea prolonging their degradation time. Typically, draining or pre-lowering the water level approximately 181.5 hours after precipitation can effectively reduce the environmental risk to surface water.更多还原