渭河生态环境问题浅析  

Analysis on Eco-environmental Problems of Weihe River

作　　者：何兴军[1] 杜佳[1] 

机构地区：[1]西北大学城市与环境学院,陕西西安710127

出　　处：《环境科学与管理》2012年第2期126-130,170,共6页Environmental Science and Management

基　　金：科学技术部:国家水体污染控制与治理科技重大专项(2009ZX07212-002-003);国际科技合作计划中瑞合作项目(2009DFA22980)资助

摘　　要：以渭河河道径流量和河流水质的实测资料为基础,应用不均匀系数法对河道径流在年内的分配规律作了分析,采用Spearman秩次相关检验对河流年均径流量进行趋势性判识,运用Kendall非参数秩次相关检验法对流域降雨量时间序列进行趋势性检验,选取综合污染指数法对河流水质变化进行了分析。结果表明,(1)渭河河道径流量整体处于波动下降的状态,与降雨量的变化趋势相似;河道径流量的年内分配不均匀系数有上升倾向,且从中游到下游亦有上升趋势。(2)河流水质的变化在2003年之前没有大的起伏,处于波动平衡状态,2003年河流水质处于最差点,之后呈现好转态势。Based on the runoff and water quality data of Wei River,the non-uniform coefficient method was used to analyze the annual runoff distribution rules.The spearman rank test method was employed to inspect the trend of average annual runoff,while the Kendall rank correlation was applied to test the trend of precipitation.The results show that：（1.）The runoff of Wei River drops in fluctuation with similar trend as precipitation,the non-uniform coefficient has an upward tendency and it shares the same trend from the middle to lower reaches;（2.） There is no great change in river water quality before 2003.The water quality deteriorated to the worst point in 2003 and improved ever since.

关 键 词：径流 水质 趋势分析 渭河 

分 类 号：X171.1[环境科学与工程—环境科学]