CAJ | 학술논문

地下水防污性能评价是开展地下水保护工作的前提，可以为城镇的规划建设提供参考，具有很强的现实意义。常用的DRASTIC地下水防污性能评价模型简单，易于操作，但该模型是针对所有污染物总体考量，没有考虑到特定污染物在包气带中发生的各种生化作用，只是人为的依据经验值进行评分赋值，具有一定的缺陷性。因此，本次研究针对两种特定污染物氨氮、硝氮，定量了其在包气带中的吸附和生物转化作用，以模型模拟法的LPI模型对北京市昌平区地下水的防污性能进行了评价。评价结果表明，昌平区地下水对于氨氮、硝氮的防污性能具有很好的分带性。从山前到平原，地下水的防污性能逐渐增强。地下水对于氨氮的防污性能好于硝氮。此外，地下水大量开采导致的地下水位下降，也增强了地下水的防污性能。由于地下水的持续开采，2009年地下水对于氨氮、硝氮的防污性能普遍好于2005年。
지하수방오성능평개시개전지하수보호공작적전제，가이위성진적규화건설제공삼고，구유흔강적현실의의。상용적DRASTIC지하수방오성능평개모형간단，역우조작，단해모형시침대소유오염물총체고량，몰유고필도특정오염물재포기대중발생적각충생화작용，지시인위적의거경험치진행평분부치，구유일정적결함성。인차，본차연구침대량충특정오염물안담、초담，정량료기재포기대중적흡부화생물전화작용，이모형모의법적LPI모형대북경시창평구지하수적방오성능진행료평개。평개결과표명，창평구지하수대우안담、초담적방오성능구유흔호적분대성。종산전도평원，지하수적방오성능축점증강。지하수대우안담적방오성능호우초담。차외，지하수대량개채도치적지하수위하강，야증강료지하수적방오성능。유우지하수적지속개채，2009년지하수대우안담、초담적방오성능보편호우2005년。
Assessment of groundwater vulnerability is a prerequisite to protect groundwater resources.It can provide a reference to city planning and construction and has a strong practical significance.The DRASTIC, which is a commonly used for groundwater vulnerability assessment model,had an extensive application in vari-ous countries since it is simple and easy to operate.However,the model just gives an overall consideration of general pollutants,and does not take into account biochemical processes of specific pollutants occurring in the vadose zone.It gets the score based on expert experience,which has a certain shortage.The LPI assessment model,which includes adsorption and biodegradation processes of ammonia and nitrate in the vadose zone,is selected to assess groundwater vulnerability to ammonia and nitrate in Changping area of Beijing.Results show that groundwater vulnerability to ammonia and nitrate has a good distribution trend in this area.From the alluvi-al fans to the flat plain,groundwater vulnerability enhances gradually.The vulnerability to ammonia is greater than nitrate.Besides,the decrease in groundwater table caused by exploitation lowers groundwater vulnerabili-ty.The groundwater vulnerability in 2005 is lower compared with 2009 due to the consistent groundwater exploi-tation.The assessment result is well consistent with groundwater quality data,indicating that the LPI model can be used for groundwater vulnerability assessment.