湖北省潜江市北部大气沉降物生态地球化学预测预警研究

An Early Warning Study on the Ecological Geochemistry Prediction of Atmospheric Deposition of Northern Qianqiang City,Hubei Province

大气沉降物是有害物质进入土壤的一种重要途径,是影响农田生态系统安全的重要因素。本研究采集了潜江市2014年3月—2015年3月期间的大气干湿沉降样品,由武汉岩矿测试中心分析大气降尘样品19项指标和大气降水样品23项指标,计算获得各元素的年沉降通量。在此基础上研究该区大气沉降物累积特征,对每个指标进行归一化处理,利用内梅罗指数法将多个元素指标综合为单一指标,分别绘制出大气降尘和大气降水指标的内梅罗指数地球化学分布图,并圈出6个预警区,取得较好的预警预测结果,这一研究成果为有关决策机构制定污染防治措施提供了参考。

Atmospheric deposition is an important way for harmful substances to enter the soil,and is an important factor affecting the safety of farmland ecosystem.In this study,samples of atmospheric dry and wet deposition from March2014to March2015were collected.The19indexes of atmospheric dustfall samples and23indexes of atmospheric precipitation are analyzed by Wuhan rock and mineral testing center,and the annual precipitation fluxes of each element are calculated.On this basis,the cumulative characteristics of atmospheric dry and wet deposition are studied.Then each index is normalized,and the Nemero index method is used to integrate the multiple element indexes into a single index.Finally,the Nemero index and geochemical distribution map of atmospheric Dustfall and precipitation indexes are made,and6warning zones are circled.A good forecast result is gained.The results of this study provide a reference for the decision making measures for the prevention and control of pollution.