地下淡水演变与水致疾病

地下淡水是地球水圈中罕见的自然资源和敏感脆弱的环境要素，地下淡水演变与人类生存息息相关。地下淡水最严重的演变是其中Ｎ－浓度的持续增高，浅层地下水成为大陆氮的贮存库。许多环境是水致疾病。水致疾病的分布受水文地球化学分带控制。在氧化带易发生碘缺乏病，在还原带易发生氟中毒病，在富有机质和Ｈ２Ｓ的潮湿地带易发生克山病。

Relation between Fresh Groundwater Evolution and Some Diseases Caused by Drinking Water

The fresh underground water (FUW) is the rare natural resource of hydrosphere in earth and the sensitive weak key element of environment.The changes of FUW have always been the context for human life.The most gravein in the FUW changes is the increasing N content in fresh groundwater,and shallow ground water is turned into the N-reservoir in the continent. A lot of diseases caused by environment are attributed to drinking water. Distribution of the diseases caused by drinking water (DCDW) is under the control of the hydrogeochemical zone. The DCDW with poor iodine may occur in the oxidizing(intake) area, and the DCDW with rich fluorine may occur in reducing (discharge) area, and the Keshan disease of DCDW may occur in a damp area where the FUW is rich in H 2S gas and organic matter.