渭河渭源段河道沉积物盐类分析

The Characteristics of Salt Settling in the Channel of Weiyuan Section of Weihe River

从靠近渭河源头的鹿鸣村到流出渭源县的三河村采集了10个样品,对样品中铵态氮、硝态氮、总氮、总磷、有机氮、有机碳的分布进行分析,同时对沉积物碳、氮、磷进行耦合性研究,发现该河段有机质输入以外源输入为主,碳的富集导致了磷的积累,沉积物中氮、磷有同源性。10个采样点盐类总量也呈逐渐上升趋势,且有机氮为沉积物氮素的主要成分,均值为1 480.22 mg/kg,其中总氮、总磷、有机氮和有机碳的最大值和最小值比分别为3.09、3.33、2.52和1.55。污染评价显示,渭河渭源河段已处在污染状态,表现为有机质污染和有机氮污染。

The paper selected 10 samples from Luming Village near the Weihe River source to the Sanhe Village which is out of Weiyuan County and analyzed the distribution of ammonium nitrogen,nitrate nitrogen,total nitrogen,total phosphorus,organic nitrogen and organic carbon of the samples. It studied the coupling of carbon,nitrogen and phosphorus of sediment and finds out that the organic matter input of the section mainly is external source import. The carbon concentration causes phosphorus accumulation. The nitrogen and phosphorus have the consanguinity in sediment. The total salt of the 10 sampling points also shows a gradual upward trend and the main component of sediment nitrogen is organic nitrogen with the mean value of 1 480.22 mg/kg,of which,the ratios of the maximum value and the minimum value of total nitrogen,total phosphorus,organic nitrogen and organic carbon are 3.09,3.33,2.52 and 1.55 respectively. The pollution assessment shows that the Weiyuan section of Weihe River has been contaminated,showing organic matter pollution and organic nitrogen pollution.