Partitioning of vertical water loss in reed swamp wetlands:Theory,research and application  

作　　者：XU ShiGuo MA Tao WANG Hao 

机构地区：[1]Institute of Water and Environmental Research, Faculty oflnfrastrucmre Engineering, Dalian University of Technology, Dalian 116024, China [2]Shandong Construction andAdministration Bureau of South-to-North Water Diversion Project, Jinan 250013, China

出　　处：《Science China(Technological Sciences)》2011年第11期2896-2903,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 50139020);the National Basic Research Program of China ("973" Program) (Grant No. 2006CB403405)

摘　　要：This paper proposes an on-site monitoring system for evaporation （Ew） and evapotranspiration （ET） in wetlands called the Compensation Evapotranspiration Observation System. Considering the characteristics of wetlands environment and emergent plants, the vertical flux of water loss in wetlands can be separated using the system based on compensation principle. A comparison research on water loss through ET in reed （Phragmites australis） stands between Zhalong wetland and Baiyangdian wetland was carded out in 2004-2009. In Baiyangdian wetland, the ET rates from three reed stands with different leaf area indexes were measured. The results show that annual ET in Zhalong wetland was 739-886 mm during study period. Comparatively, annual ET of the three reed stands in Baiyangdian wetland was 970-1117 mm, 1261-1452 mm and 1759-2035 ram, respectively. The ET rates in Baiyangdian were stronger than in Zhalong because of the effects of geography and climate characteristics. Moreover, seasonal dynamic changes and influence factors of transpiration-acting factor from the two wetlands were also analyzed. It is indicated that the transpirafion-actng factor can be affected by geographic location, aboveground biomass, plant growth and climate conditions.

关 键 词：Phragmites australis EVAPOTRANSPIRATION measurement method Zhalong wetland Baiyangdian wetland 

分 类 号：S513[农业科学—作物学] P931.7[天文地球—自然地理学]