不同水文条件下巢湖典型河流磷形态研究  

Study on Phosphorus Forms in Typical Rivers of Chaohu Lake Basin under Different Hydrological Conditions

作　　者：高敏 姜晓霞 储茵[1] GAO Min;JIANG Xiaoxia;CHU Yin(College of Resources and Environment,Anhui Agricultural Unwersity,Hefei 230036,China)

机构地区：[1]安徽农业大学资源与环境学院,安徽合肥230036

出　　处：《水文》2023年第1期90-95,共6页Journal of China Hydrology

基　　金：安徽省自然基金项目(1908085MD102)。

摘　　要：河流输送是受纳水体中磷的主要来源,不同水文条件对其输送有很大影响。选择巢湖典型入湖河流丰乐和柘皋,在不同水文条件下,即非洪水期(丰乐和柘皋)、洪水涨水段(丰乐)与退水段(柘皋)对河水和沉积物进行分布式采样,测定磷的不同形态。其中,河水测定总磷(TP)和可溶性磷(DP),沉积物测定总磷(TP)、无机磷(IP)、有机磷(OP)、铁铝磷(Fe/AL-P)和钙磷(Ca-P)。结果表明:非洪水期丰乐和柘皋河河水和沉积物中TP含量均为柘皋河高于丰乐河,两河都存在着富营养化风险,两河沉积物IP含量都显著高于OP。IP中,柘皋河Fe/Al-P含量略高于Ca-P,丰乐河相反。洪水涨水期,丰乐河河水TP和DP含量显著高于其非洪水期含量,沉积物不同形态磷均值含量较非洪水期略有降低,表明洪水涨水段降雨径流对不同来源磷冲刷、输送和泛起作用;洪水退水期,柘皋河河水TP和DP含量低于其非洪水期含量,河道沉积物不同形态磷均值含量较非洪水期有所升高,表明在退水段以稀释和沉淀作用为主。River transportation,which is the main source of phosphorus in a receiving water body,is under the great influence of hydrological conditions.Fengle River and Zhegao River,two typical inflowing rivers of Chao Lake,were chosen,where samples of water and sediment were taken from distributed sampling sites of both rivers under various hydrological conditions,i.e.,during the non-flood period(Fengle and Zhegao),at flood rising section(Fengle),and at flood recession section(Zhegao).Water samples were analyzed for total phosphorus(TP)and dissolved phosphorus(DP)and sediments for TP,organic phosphorus(OP),inorganic phosphorus(IP),iron aluminum phosphorus(Fe/Al-P),and calcium phosphorus(Ca-P).The results showed that during the nonflood period the TP content in water and sediments of Zhegao was much higher than that of Fengle and both rivers were at risk of eutrophication.The IP content in sediments of the two rivers was significantly higher than that of OP.Fe/Al-P content in Zhegao River was slightly higher than Ca-P,but it was the opposite for Fengle River.In the flood rising section,TP and DP contents in river water of Fengle were greatly higher than that in the non-flood period,while the average contents of various forms of phosphorus in the sediments were slightly lower than that in the non-flood period,indicating the washing off,transportation,and resuspension effects of rainfall and flood runoff in flood rising period.In the flood recession section,TP and DP contents in the river water of Zhegao were lower than that in the non-flood period,while the average contents of various forms of phosphorus in the sediments were higher than that in the non-flood period,indicating the dilution and sedimentation effects of runoff in flood recession.

关 键 词：水文条件 非洪水期 涨水段 退水段 沉积物 磷形态 

分 类 号：X52[环境科学与工程—环境工程]