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目的研究淮北市地下水水质变化趋势,为水源保护和饮用水的监督监测提供依据。方法依据淮北市区域规划和工业企业区及居民区的分布,从北向南依次均匀布点36个,连续监测10年。用Grey-Markov趋势研究分析方法对变化较大的总硬度,氯化物、硫酸盐3项指标进行统计分析。结果 10年间淮北市市区岩溶水总硬度、氯化物、硫酸盐3项指标平均为376mg/l、39.9 mg/l、96mg/l,矿区集镇岩溶水为335mg/l、97.4mg/l、157 mg/l,浅层地下水为377mg/l、99.3 mg/l、121 mg/l。经分析不同区域和不同取水层的地下水3项指标的含量,均有随年份逐渐增高的趋势。其2011年的预测值市区分别为418.36mg/l、44.58mg/l、126.07mg/l;矿区集镇分别为404.11 mg/l、68.43 mg/l、135.49mg/l;浅层地下水分别为488.66mg/l、145.69mg/l、178.67mg/l。结论淮北市地下水水质在逐渐恶化,如果任由这种变化趋势长期存在,势必影响供水安全。
Objective To study the change trend of groundwater quality in Huaibei City and provide the basis for the supervision and monitoring of water source protection and drinking water. Methods Based on the regional planning and the distribution of industrial enterprises and residential areas in Huaibei, 36 samples were distributed uniformly from north to south for 10 years. Gray-Markov trend analysis method was used to analyze the three indexes of the total hardness, chloride and sulfate which changed greatly. Results The average hardness, chloride and sulfate of three indicators of karst water in urban area of Huaibei City were 376 mg / l, 39.9 mg / l and 96 mg / l, 335 mg / l and 97.4 mg / mg / l, shallow groundwater 377 mg / l, 99.3 mg / l, 121 mg / l. After analyzing the contents of three indexes of groundwater in different regions and different aquifers, the trend of increasing gradually with the years. The predicted urban areas in 2011 were 418.36mg / l, 44.58mg / l and 126.07mg / l, respectively. The mine towns were 404.11 mg / l, 68.43 mg / l and 135.49 mg / l, respectively. The shallow groundwater was 488.66 mg / l, 145.69 mg / l, 178.67 mg / l. Conclusions The quality of groundwater in Huaibei City is deteriorating gradually. If this trend of change is allowed to exist for a long period of time, it will inevitably affect the water supply security.