小江水文气象条件对水体氮、磷、叶绿素a的影响研究  

The Effect of Hydrometeorologic Conditions on the N,P,Chla in the Xiaojiang River

作　　者：王晓青[1] 黄舸[2] 

机构地区：[1]重庆交通大学西南水运工程科学研究所,重庆400016 [2]重庆一三六地质队,重庆401147

出　　处：《水利科技与经济》2013年第12期1-5,共5页Water Conservancy Science and Technology and Economy

基　　金：中国科学院西部行动计划资助项目(KZCX2-XB2-07-02);国家水专项资助项目(2009ZX07104-002;2009ZX07104-003)

摘　　要：采用SWAT水文模型,对小江流域多年平均流量和年内径流量分配进行了估算,根据2007年3月-2008年3月小江渠马、高阳、黄石、双江大桥和河口5个断面总氮(TN)、总磷(TP)、叶绿素a (Chla)的监测值,结合小江流域气象资料及流量计算值进行分析,研究气温、降雨量和流量对TN、TP、Chla监测值变化的影响.研究结果表明,TN、TP的高浓度值容易出现在降雨量大、流量大的丰水期;高的Chla监测值容易出现在3-5月份小江流量在35 ～45 m3/s之间,且前期降雨量适中的情况下;流量大于150 m3/s或日平均降雨量大于30 mm的水文条件下容易测得高的TN、TP浓度值,但Chla含量较低.The SWAT hydrological model was used to simulate the annual discharge and its characteristics in the Xiaojiang River. Based on the monitoring concentrations of the TN( Total Nitrogen), the TP( Total phosphorus) and the chlorophyll- a( Chla) from fiver cross- sections: Quma,Gaoyang,Huangshi,Shuangjiang bridge,Hekou and hydrometeorologic data in the Xiaojiang River from Mar. 2007 to Mar. 2008,the effect of temperature,precipitation and water discharge on the TN,the TP and the Chla concentrations in the Xiaojiang River were studied. The results show that the high concentrations of the TN and the TP are easy to be developed in the high precipitation and high discharge period; The high Chla concentrations are easy to be developed from March to May when the precipitation is moderate and the discharge is 35 ~ 45 m3/ s. The high concentrations of TN and TP are easy to appear under the conditions of discharge higher than 150 m3/ s,or daily precipitation higher than 30mm,whereas the concentrations of Chla are relatively low during this period.

关 键 词：流量 降雨量 总氮 总磷 叶绿素A 小江 

分 类 号：X171.1[环境科学与工程—环境科学]