A 2.5 km stretch of a sandur (glacial outwash plain) neighbouring a wetland in South-east Iceland was monitored from 1 September 2015 to 2 September 2016. Improved understanding of the hydrological regime at this sandur-wetland boundary is warranted as local farmers are losing ground to the frequent flooding of their wet meadows despite the existence of elevated berms. A series of water wells were installed across a sandur-wetland boundary, to monitor water table fluctuations, determine flooding extent and assess groundwater inflow. Flooding occurred rapidly in the sandur during 19 weather events, which included modest and heavy rainfall, and glacial outburst floods (jökulhlaups). Water levels on the South-western edge of the wetland responded in sync with the sandur during flooding, indicating a connectivity via groundwater exchange across the coarse, non-vegetated berm. We estimated that between 6 June and 31 August, 11,275 m³ of groundwater flowed from the sandur to this part of the wetland. This contrasted with the South-eastern edge of the wetland, which had an older, vegetated berm. Here, only 7446 m³ of groundwater flowed from the sandur to the wetland. Overall, these modest water inputs accounted for 76% of seasonal evaporation loss from the wetland (191 mm).

从2015年9月1日至2016年9月2日，在冰岛东南部一个湿地附近监测了一个2.5公里长的沙德尔（冰川冲积平原）。由于当地农民正在流失，因此有必要进一步了解该沙德尔-湿地边界的水文状况尽管存在高架护堤，但地面还是经常被湿润的草地淹没。跨越桑杜尔湿地边界安装了一系列水井，以监测地下水位波动，确定洪水泛滥程度和评估地下水流入量。在19个天气事件中，桑杜尔地区洪水泛滥迅速，其中包括适度和强降雨以及冰川爆发洪水（jökulhlaups）。在洪水期间，湿地西南边缘的水位与沙德尔同步，表示通过非植被粗大植被的地下水交换而形成的连通性。我们估计，在6月6日至8月31日期间，共有11,275 m从桑杜尔流向湿地这部分的地下水为³。这与湿地的东南边缘形成了鲜明对比，后者有一个较早的，有植被的河床。在这里，只有7446 m ³的地下水从桑杜尔流向湿地。总体而言，这些适度的水输入占湿地（191毫米）季节性蒸发损失的76％。