在本文中,总氮(TN)的分布特征,通过钼蓝/抗坏血酸分光光度法和标准测量与测试(SMT)研究了干湿季节Pi和Shating河流的水和表层沉积物中的总磷(TP)以及氮和磷的含量。相关分析,采用聚类分析和主成分分析确定氮磷污染源。结果表明:(1)研究区水体和表层沉积物中的氮、磷含量不同。(2)在皮河中,动植物残留物的分解,水产养殖废水和城市生活污水积累的渗滤液是氮磷污染的主要来源,在沙亭河里,农药和化肥的不合理施用,动植物残留物的降解,来自农业排水通道的农业废水,工业生产废水和农业废弃物的风化对氮磷污染有很大影响。本研究结果为流域氮磷污染负荷的降低实施有效的治理措施提供了可靠的实验数据和参考。
In this paper, the distribution characteristics of total nitrogen (TN), total phosphorus (TP) and fractions of nitrogen and phosphorus in water and surface sediments of the Pi and Shiting rivers in the dry and wet seasons were studied by molybdenum blue/ascorbic acid spectrophotometry and Standard Measurements and Testing (SMT). Correlation analysis, cluster analysis and principal component analysis were used to identified nitrogen and phosphorus pollution sources. The results showed that: (1) nitrogen and phosphorus in water and surface sediments in the
study area were at different levels. (2) In the Pi river, the decomposition of animal and plant residues, the leachate from the accumulation of aquaculture wastewater and urban domestic sewage were the main sources of nitrogen and phosphorus pollution, while in the Shiting river, the unreasonable application of pesticides and fertilizers, the degradation of animal and plant residues, agricultural wastewater from agricultural drainage channels, industrial production wastewater and the weathering of agricultural wastes had a great impact on the nitrogen and phosphorus pollution. The results in this
study provide reliable experimental data and a reference to local relevant departments for the implementation of effective control measures for the reduction of the nitrogen and phosphorus pollution load in the river basin.