摘要
采用曼-肯德尔和森方法,对海河流域省界断面水质达标比例和主要指标的超标比例及降雨量进行分析,探讨水质的演变特征及与降雨量的关系。结果表明:近10年非汛期达标比例和全年期COD超标比例呈现显著的变化趋势。氨氮的断面超标比例较高。汛期水质达标比例与汛期降雨量存在显著负相关,汛期降雨量增加降低了水质达标比例。DO、高锰酸盐指数、BOD和氨氮的超标比例年内变化存在差异,其主要与指标自身特性、气温以及与水文循环有关。
Trends of water quality in provincial section and precipitation in the Haihe River basin during 2004 -2013 were explored with Mann - Kendall test and Sen＇s Method. The results showed significant changes in the percentage of days that meet water quality standard in non - flood period and that fail COD water quality standard in full year in provincial section. A high per- centage for NH3 - N pollution was detected. The percentage of water quality that meet the standards was negatively correlated with the precipitation in flood period. The increase of precipitation in flood period decreased the proportion up to water quality standard in provincial section. Intra- annual variations of the proportions（ DO, permanganate index, BOD and NH3 -N） that failed the water quality standard in provincial section were different, mainly due to the characteristics of water quality parameter, tempera- ture and hydrological processes in the Haihe River basin.
出处
《环境科学与管理》
CAS
2015年第9期50-54,共5页
Environmental Science and Management
基金
天津市高校"中青年骨干创新人才培养计划"(ZX110GG019)
流域水循环模拟与调控国家重点实验室开放研究基金(IWHR-SKL-201418)
关键词
水质
趋势分析
水期
降雨量
海河流域
water quality
trend analysis
water period
precipitation
the Haihe River basin
