深入理解地表水-地下水转化关系对建立区域水循环模式、开展区域水资源评价与管理工作具有重要意义。通过对陡河流域地表水-地下水水样的氢氧同位素分布特征进行分析，发现研究区河岸带第Ⅰ含水层除了受大气降水、灌溉回归水入渗补给外，还接受河水早期的渗漏补给，第Ⅱ含水层对第Ⅲ含水层有越流补给，第Ⅱ含水层同时也受大气降水和灌溉回归水的影响，而远离河岸带的第Ⅳ含水层与上覆各含水层稳定同位素组成显著不同，河岸带水库附近的第Ⅳ含水层可能受地表水库渗漏影响。河岸带地下水与地表水水力联系的变迁严格受河岸带地下水水位变化控制，如景庄子剖面的地下水埋深为5 m，雨季时河水补给地下水，旱季时地下水补给河水，而靠近地下水漏斗中心的越河剖面上地下水水位埋深达25 m，其常年受地表水补给。

Understanding the interaction between surface water and groundwater is of great significance to the establishment of regional water cycle model and water resources evaluation and management. Through the study of isotopic distribution of hydrogen and oxygen in surface water and groundwater of the Dou River basin, the results show that (1) the first aquifer in the riparian zone is recharged by precipitation, irrigation return water, and leakage from surface water; (2) the third aquifer is recharged by leakage from the second aquifer; (3) the second aquifer is also affected by precipitation and irrigation return water; and (4) the fourth aquifer has different isotopic characteristics from other aquifers, and the fourth aquifer in the riparian zone may be recharge by the leakage from the surface water reservoir. The variation of hydraulic connection between groundwater and surface water in the riparian zone is strictly controlled by the groundwater level variation. The groundwater depth at the JingZhuangzi profile is 5 m, and the hydraulic connection between the groundwater and river at the profile behaves naturally with river recharging groundwater during the wet season and groundwater recharging river during the dry season. The groundwater depth reaches up to 25 m at the cross river profile near to the center of the groundwater depression cone, and river recharges groundwater all the time.

中国地质调查局项目“滦河三角洲地下水污染调查评价”（1212010634608）