赤峰市潜水中氟形成的主要自然环境与分布规律的研究

Study on Main Nature Environment and Distribution Low of Formation of Fluorine in Under Groud Water Chifeng Region

赤峰市潜水中氟离子（下称氟）含量，超过饮水标准（１ｍｇ／Ｌ）的面积，约占全市总面积５０％，约２５万人口患氟中毒病。本文从地质、地貌、水文地质条件入手，研究潜水中氟形成与分布的主要自然环境。文中重点阐述地下水的形成与水中氟迁移，累积关系。研究发现，水中氟＜０．５ｍｇ／Ｌ区，位于大兴安岭以西，是地下水迳流排泄区，大兴安岭以东，是地下水分水岭区；０．５～１ｍｇ／Ｌ区，位于补给及排泄区；１－３ｍｇ／Ｌ区，位于排泄、这流区；＞３ｍｇ／Ｌ区，是地下水以蒸发消耗为主区。后两区是氟高发地段。由山区→山前区→主谷平原区→河流，水中氟含量呈现出，由低→高→低→更低的变化规律。

The paper studied the main mature environment of the formation anddistribution of fluo fluorine in the underground water in chifeng region on the basis ofgeology, land form and hydrogeological conditions. It chiefly discussed the ralationbetween the lormation lr the under ground water and the rein ovtion ovtion andaccumulation fluorine in the underground water. The area in which the content of fluorineof underground water (CFUW ) is less than 0. 5mg/L contains the draining region ofunderground water on the west of Daxinganling, and the divide region of undergroundwater on the east of Daxinganling, the area in which the CFUW is 0. 5-1mg/L belong tothe region of the replenishment and drain of underground water. The area in which theCFUW is 1-3mg/L belong to the draiing region of underground water, and the area inwhich the CFUW is over>3mg/L belong to the main region of the evaporation andconsumption. The latter two areas are high fluorine region fluorine content inunderground water changes reqular from low to high to low to lower with theregionchanged from the mountain region to the region in front of the moutain to the plainregion and to the river.