密云水库总氮现状及出入库路径解析研究  

Study on the status quo of total nitrogen in Miyun Reservoir and analysis of the path in and out of the reservoir

作　　者：李垒 刘嘉璇 李兆欣 叶芝菡 李亚楠 LI Lei;LIU Jiaxuan;LI Zhaoxin;YE Zhihan;LI Yanan(Beijing Water Science and Technology Institute,Beijing 100048,China;Hohai University,Nanjing 210024,China;Beijing Miyun Reservoir Management Office,Beijing 101512,China)

机构地区：[1]北京市水科学技术研究院,北京100048 [2]河海大学,南京210024 [3]北京市密云水库管理处,北京101512

出　　处：《北京水务》2022年第S02期49-54,共6页Beijing Water

摘　　要：近年来,密云水库总氮浓度持续升高,通过对2020—2022年3年间总氮浓度的变化规律的研究,分析了水质与水量之间的响应关系。结果表明,库区总氮浓度从2020年的1.31 mg/L到2021年的1.37 mg/L,再到2022年的1.98 mg/L,呈现出逐年升高的趋势。从河流入库和大气沉降两方面研究核定了总氮输入总量。潮河3年的入库平均浓度为6.63 mg/L,白河3年的入库平均浓度为2.77 mg/L,潮河的入库总氮浓度显著高于白河;库区总氮干沉降主要以气态干沉降为主,占比69.1%。从鱼类总氮、水库放水以及水体自净等3个方面核算了总氮输出总量。鱼类总氮量年平均为56.59 t;水库放水总氮量年平均为1 012.98 t;微生物累计脱氮量年平均为1 956.72 t。研究结果为密云水库总氮防控与政策制定提供参考依据。In recent years,the total nitrogen concentration in Miyun Reservoir has continued to increase.This paper studies the change law of total nitrogen concentration in the three years from 2020 to 2022,and analyzes the response relationship between water quality and quantity.The results show that the total nitrogen concentration in the reservoir area has increased from 1.31mg/L in 2020 to 1.37mg/L in 2021 and then to 1.98mg/L in 2022,showing a trend of increasing year by year.The total nitrogen input was studied and approved from the aspects of river inflow and atmospheric deposition.The average concentration of Chaohe in three years was 6.63mg/L,and the average concentration in Baihe in three years was 2.77mg/L,and the total nitrogen concentration in Chaohe was significantly higher than that in Baihe.The total dry deposition of nitrogen in the reservoir area was mainly gaseous dry sedimentation,accounting for 69.1%.The total nitrogen output was calculated from the aspects of reservoir water discharge and water self-purification.The annual average amount of total nitrogen released from the reservoir was 1012.98 t and the annual average annual nitrogen removal of microorganisms was 1956.72 t.

关 键 词：总氮浓度 河流入库 大气沉降 水库放水 水体自净 

分 类 号：X522[环境科学与工程—环境工程]