【摘要】 通过对大汶河流域中游地区40件地下水样品进行测试分析,运用统计分析法分析了水化学指标特征,采用单因子评价法、模糊综合评价法进行了地下水水质评价。结果表明:1.地下水中pH值的含量相对稳定,K⁺,Fe,Mn,NH⁺₄,NO^-₂,Pb空间变异性较强;地下水中主要阳离子是Na⁺,Ca²⁺,主要阴离子是SO■,Cl^-,NO^-₃。2.TDS、总硬度含量呈现由研究区东部柴汶河、牟汶河上游地区至西部大汶河下游河谷平原区,由东南部低山丘陵区至西北部山间沟谷地区逐渐增大的趋势。3.水质评价结果显示,大汶河流域中游地区地下水质量整体较差,多为Ⅳ类水和Ⅴ类水,无法满足当地居民的生活饮用水要求。研究成果为流域内水资源的合理开发利用提供了理论依据,为将来水资源保护提供了基础资料。更多还原

【Abstract】 Through test and analysis of 40 groundwater samples in the middle reaches of Dawenhe river basin, by using statistical analysis method, characteristics of hydrochemical indicators have been analyzed. The groundwater quality has been valuated by using single factor evaluation method and fuzzy comprehensive evaluation method. It is showed that the pH content of groundwater is relatively stable, and K⁺, Fe, Mn, NH⁺₄, NO^-₂ and Pb have strong spatial variability. Main cations in groundwater are Na⁺ and Ca²⁺, main anions are SO■, Cl^- and NO^-₃. TDS and total hardness content in the study area has an increasing trend from the upper reaches of Chaiwenhe river and Mouwenhe river in the east to the valley plain in the lower reaches of Dawenhe river in the west, from southeast low hilly region to northwest intermountain valley region. As showed by water quality evaluation results, groundwater quality in the middle reaches of Dawenhe river basin is generally poor. Most of them are type IV water and type V water. It can not meet the requirement of drinking water of local residents. The research results can not only provide a theoretical basis for rational development and utilization of water resources in the basin., but also provide basic data for future water resources protection.更多还原