房顶蓄水防氟,是近年我市在防氟改水实践中逐步探索出来的一种新途径,特别适用于花岗岩地带氟病区防氟改水工作,情况介绍如下。 一、基本状况及房顶蓄水的物质基础 我市花岗岩氟病区主要分布在登封县,海拔300米,属半干旱气侯区。地表层为元古斯黑云母钾长花岗岩,居民近2万人口。分布 Fluoride roof water storage, in recent years, our city in the practice of fluoride to gradually explore a new way out of water, especially for fluoride in the granite area fluoride to prevent water change work, the situation are as follows. First, the basic situation and the material basis of the roof water We are mainly located in the city of granite fluoride ward Dengfeng County, 300 meters above sea level, is a semi-arid climate zone. The surface layer of metasitic biotite potassium long granite, residents nearly 20,000 population. distributed