基于水系沉积物地球化学背景特征的生态环境评价

Ecological environment assessment based on geochemical background characteristics of aquatic sediments

本文通过对额尔古纳地区1∶25万区域化探数据分析研究,探讨用水系沉积物地球化学背景特征评价研究区生态环境。参照生态环境地球化学评价方法,对研究区的生态环境进行评价,得出研究区的生态环境总体较好,局部存在轻度至重度污染,并重点圈定了F、As元素土壤污染区域。特征植物营养元素相互间搭配平衡关系较差,说明该区的土壤环境不能很好地为植物生长提供适宜的营养补给条件。测区生命必需元素均在正常范围之内,适宜人类生活和工作。综合分析认为,造成研究区内污染状况的原因可能与矿业开采、人类活动及地质背景等因素有关。区域化探数据结合生态环境地球化学评价方法可以应用于内蒙古生态环境评价。

This paper studies the ecological environment assessment of the Erguna area using 1 ∶ 250,000 regional geochemical exploration data and discusses the ecological environment assessment based on the geochemical background characteristics of aquatic sediments.Referring to the ecological environment geochemical assessment method,the ecological environment of the study area is evaluated,finding that the ecological environment is generally good with some areas showing light to severe pollution.The soil pollution areas of elements F and As are identified as key areas.The poor balance of nutrient elements in characteristic plants indicates that the soil environment in this area cannot provide suitable nutrient supply conditions for plant growth.Essential elements for life in the survey area are all within the normal range,suitable for human life and work.The comprehensive analysis suggests that the pollution in the study area may be related to factors such as mining,human activities,and geological background.Regional geochemical exploration data combined with ecological environment geochemical assessment methods can be applied to ecological environment assessment in Inner Mongolia.