Huang Jin-Liang, Huang Ya-Ling, Li Qing-Sheng, Zhou Zeng-Rong, Feng Yuan, Zhang Zhen-Yu
Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361005, China.
Huan Jing Ke Xue. 2012 Apr;33(4):1098-107.
Twenty one sub-watersheds in the Jiulong River watershed were chosen for in-situ monitoring water quality of baseflow in flood season, dry season and average season in 2010. Geographical information system and multivariate analysis were coupled to characterize the spatiotemporal variation of water quality and identify its influencing factors. The results show that the water quality in dry season is the worst whereas the water quality in flood season is comparatively good. The first principal component representing sanitary and industrial wastewater pollution, explained 45.58% of the total variance of water quality. The second principal component concerning pollution due to agricultural activities, explained 21.28% of the total variance. NH4(+) -N, SRP, potassium permanganate index, K+, Cl-, Mg2+ and Na had a significantly positive correlation with percentage of built-up and density of population. NO3(-) -N was correlated positively with percentage of cropland. The sub-watersheds with high proportion of build-up area and density of population show high concentration of NH4(+) -N, SRP, potassium permanganate index, K+, Cl-. Comparatively, the sub-watersheds with high percentage of cropland show high level of nitrate concentration. Improvement of the wastewater treatment efficiency and increased recognition of agricultural non-point source pollution were finally highlighted from watershed management perspectives.
2010年，在九龙江流域选取了21个小流域，对汛期、枯水期和平水期的基流水质进行原位监测。耦合地理信息系统和多变量分析来表征水质的时空变化并识别其影响因素。结果表明，枯水期水质最差，而汛期水质相对较好。代表生活污水和工业废水污染的第一主成分解释了水质总方差的45.58%。涉及农业活动污染的第二主成分解释了总方差的21.28%。NH4(+) -N、溶解性总磷、高锰酸钾指数、K+、Cl-、Mg2+和Na与建设用地比例和人口密度呈显著正相关。NO3(-) -N与耕地比例呈正相关。建设用地面积比例和人口密度高的小流域，NH4(+) -N、溶解性总磷、高锰酸钾指数、K+、Cl-浓度较高。相比之下，耕地比例高的小流域硝酸盐浓度较高。最后从流域管理的角度强调了提高污水处理效率和增强对农业面源污染的认识。
