地下井水环境监测与评价

依据相关的地下水质量标准．对研究区采集的不同监测井的地下水样品进行了评价。结果表明．9个监测井的总锰．氨氮．凯氮和高锰酸盐指数全部超标．各个指标的最大超标倍数及监测井号依次为8．44(6#总锰)．70．5(5#氨氮)．8．8(5#凯氮)和2．27(7#高锰酸盐指数)。另外．比较2002年和2000年2年的监测数据可见．对比的井位1#～7#中的高锰酸盐指数有不同程度的增大．BOD5则有大幅减少：而1#和2#中的氨氮．凯氮均有较大幅度的减小(氨氮分别减少7．21mg／L、7．32mg／L．凯氮分别减少17．57mg／L、5．28mg／L)：综合污染指数P在监测井1#、2#、4#、6#和7#均有明显的减小。反映其污染程度减轻。

Environmental Monitoring and Assessment of Groundwater

Assessment of groundwater quality in different monitoring wells in study area have been conducted according to the relative standards of groundwater quality. The results indicated that total Manganese, ammonia nitrogen, Kjeldahl nitrogen and CODMn were all standard-violation in the 9 wells. The maximum multiples of standard-violation of every item were 8.44 (6#)70.5(5#)8.8(5#) and 2.27 (7#). In addition, there were increasing trend of CODMn and decreasing trend of BOD5 in 1#~7# by comparison of data with 2000 and 2002, and ammonia nitrogen and Kjeldahl nitrogen decreased to great extent in 1# and 2# (ammonia nitrogen decreased 7.21mg/L and 7.32mg/L, Kjeldahl nitrogen decreased 17.57mg/L and 5.28mg/L). The integrated pollution indexes decreased obviously in wells 1#,2#,4#,6# and 7#, which indicated thad the extent of pollution were lower than that in 2000.