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工农业生产的迅速发展使地下水硝酸盐氮(NO3-—N)污染成为世界性的环境问题。地下水中硝酸盐的来源研究在水文地质结构特殊的西南岩溶地区就显得尤为重要。稳定氮同位素和氧同位素在地下水硝酸盐的来源示踪研究中有着广泛的应用。本研究选取岩溶地区典型地下河——广西桂林寨底地下河为研究对象,通过氮氧同位素数据,判断寨底地下河硝酸盐来源是以动物粪便为主的农家肥,为该区地下水的保护和利用提供科学依据。
The rapid development of industrial and agricultural production makes the pollution of groundwater nitrate nitrogen (NO3 - N) a worldwide environmental problem. The study of the source of nitrate in groundwater is particularly important in the southwestern karst area with special hydrogeological structure. Stable nitrogen and oxygen isotopes are widely used in the source tracing of groundwater nitrate. In this study, a typical underground river in karst area - Guilin subterranean riverbed in Guangxi was selected as the research object. Nitrogen and oxygen isotope data were used to determine the source of nitrate in subterranean riverbed. The manure was mainly from animal manure, which protected the groundwater in this area And use to provide a scientific basis.