Rocks formed by underground water genetic type of geomorphology, the characteristics of meteorology are the main factors controlling the background value of environment of iodine clement and the content of iodine in water.

• 影响地下水形成的岩石、地貌成因形态类型、气象等,是制约碘元素的环境背景值及其水中碘含量的主要因素。