鄂西南烟区空气和灌溉水质量初探——以恩施自治州利川市为例

Preliminary Studies on Quality of Air and Irrigation Water in Southwestern Tobaccoplanting Region of Hubei Province:Taking Lichuan County in Enshi as an Example

通过对利川市烟区空气和灌溉水进行采样、监测和分析,并采用综合污染指数法进行评价,结果表明,利川市烟区空气综合质量状况达到Ⅰ级标准,且随着距利川市城区距离的缩短,空气的综合污染指数呈逐渐升高的趋势,且9月份的环境空气综合污染指数较5月份和7月份均呈不同程度的升高趋势;灌溉水综合质量状况达到Ⅰ级标准,灌溉水中重金属种类主要为砷和铬,但其含量均低于《农田灌溉水质标准》(GB5084-2005)所规定限值。

The air and irrigation water were sampled, monitored and analyzed in tobacco-planting region of Lichuan county, and was evaluated with comprehensive pollution index. The results showed that the comprehensive quality status of atmosphere in tobacco-planting region of Lichuan county reached standard I . As the shortening of distance from urban area of Lichuan county, the comprehensive pollution index of air had a rising tendency. The comprehensive pollution index of air in September would be higher to some degree than that in May and July. The comprehensive quality status of irritation water reached standard I . The types of heavy metal in irritation water were As and Cr, but the contents of As and Cr in irritation water were all below the limiting value based on irrigation water quality standards （GB5084-2005）.