中文摘要：

为探明赤水林区旱季地表径流补给来源组成以及雾水对该地区的水量贡献,于2014年12月对区域内水量大、易进入的3条瀑布径流进行了采样,样品包括雾水、泉水和溪水。通过对水样进行D、~（18）O同位素分析,并与遵义的降水同位素数据对比,发现赤水林区旱季雾水的D、^（18）O明显比降水富集;泉水和溪水具有相似的氢氧同位素组成,都落在11月与12月的降水同位素之间,且都分布于遵义地区降水线附近。赤水林区旱季地表径流主要受地下水补给,地下水是前期间断性的降水与持续不断的雾水的混合。雾水间接补给地表径流,是旱季地表径流重要的水量来源。在四洞沟、十丈洞和燕子岩这几个区域的平均补给量达到了24.1%（D同位素的计算结果）,^（18）O同位素的计算结果为20.0%。

英文摘要：

To enable a detailed investigation of the runoff recharge sources in the Chishui forest region and the contribution of fog drip in Chishui forest region during the dry season,water samples（ including fog drip water,spring water and stream water） were collected in December 2014 from three major streams. A comparison of D and18 O isotopic water sample results with isotopic data for precipitation in Zunyi,showed that fog drip is distinctly more enriched in heavy isotopes than precipitation. The isotopic composition of spring and stream water was plotted,together with that of November / December precipitation,with results showing that stream water has similar isotopic composition to spring water,distributed along the local meteoric water line（ LMWL）. Isotopic data indicate that runoff is mainly recharged by groundwater,which is a mixture of early intermittent precipitation and continuous fog drip. Fog drip is an important surface runoff source in the Chishui forest region during the dry season,but it does not recharge surface runoff directly. The average contribution of fog drip reached 24. 1% in the Sidonggou,Shizhangdong,and Yanziyan sampling areas（ when calculated by δD,when calculating results by δ~（18）O,the corresponding proportion was 20. 0%）.