Abstract
Dew is a crucial factor of water cycle in wetland ecosystem. This study aims to investigate the dewfall in Carex lasiocarpa marsh in the Sanjiang Plain. The experiment was carried out during the growing season from mid-May to mid-October in 2008 and 2009. Dew was monitored by woodsticks. Results indicated that dew intensity in 2008 was lower than it in 2009 obviously because of the much higher relative humidity in 2009. But annual dewfall was almost the same, which reached 8.76 mm and 8.38 mm in 2008 and 2009, respectively. The dew intensity reached the peak in August in both years. The Carex lasiocarpa marsh was the important site for the dew deposit.