• 论文 •

### Effects of Climatic Change on Evapotranspiration in Zhalong Wetland, Northeast China

WANG Hao1, XU Shiguo1, SUN Leshi2

1. 1. Institute of Water and Environmental Research, Department of Civil Engineering, Dalian University of Technology, Dalian 116023, China;
2. Meteorological Bureau of Qiqihar, Qiqihar 161000, China
• 收稿日期:2006-02-28 修回日期:2006-07-18 出版日期:2006-09-20 发布日期:2011-12-15
• 作者简介:WANG Hao(1976- ),male,a native of Liaoyang of Liaoning Province,Ph.D.candidate,specialized in water resources and water environment.E-mail:haowang@student.dlut.edu.cn.
• 基金资助:

Under the auspices of the National Natural Science Foundation of China(No.50139020)

### Effects of Climatic Change on Evapotranspiration in Zhalong Wetland, Northeast China

WANG Hao1, XU Shiguo1, SUN Leshi2

1. 1. Institute of Water and Environmental Research, Department of Civil Engineering, Dalian University of Technology, Dalian 116023, China;
2. Meteorological Bureau of Qiqihar, Qiqihar 161000, China
• Received:2006-02-28 Revised:2006-07-18 Online:2006-09-20 Published:2011-12-15

Evapotranspiration (ET) process of plants is controlled by several factors. Besides the physiological factors of plants, height, density, LAI (leaf area index), etc., the change of meteorological factors, such as radiation, temperature, wind and precipitation, can influence ET process evidently, thus remodeling the spatial and temporal distribution of ET. In order to illuminate the effects of meteorological factors on wetland ET, the ET of Zhalong Wetland was calculated from 1961 to 2000, the statistical relationships (models) between ET and maximum temperature (Tmax), minimum temperature (Tmin), precipitation (P) and wind speed at 2m height (U2) were established, and the sensitivity analysis of the variables in the model was performed. The results show that Tmax and Tmin are two dominating factors that influence ET markedly, and the difference of rising rate between Tmax and Tmin determines the change trend of ET. With the climatic scenarios of four General Circulation Models (GCMs), the ET from 2001 to 2060 was predicted by the statistical model. Compared to the period of 1961-2000, the water consumption by ET will increase greatly in the future. According to the scenarios, the rise of Tmax (about 1.5℃ to 3.3℃) and Tmin (about 1.7℃ to 3.5℃) will cause an additional water con- sumption of 14.0%-17.8% for reed swamp. The ecological water demand in Zhalong Wetland will become more severe.

Abstract:

Evapotranspiration (ET) process of plants is controlled by several factors. Besides the physiological factors of plants, height, density, LAI (leaf area index), etc., the change of meteorological factors, such as radiation, temperature, wind and precipitation, can influence ET process evidently, thus remodeling the spatial and temporal distribution of ET. In order to illuminate the effects of meteorological factors on wetland ET, the ET of Zhalong Wetland was calculated from 1961 to 2000, the statistical relationships (models) between ET and maximum temperature (Tmax), minimum temperature (Tmin), precipitation (P) and wind speed at 2m height (U2) were established, and the sensitivity analysis of the variables in the model was performed. The results show that Tmax and Tmin are two dominating factors that influence ET markedly, and the difference of rising rate between Tmax and Tmin determines the change trend of ET. With the climatic scenarios of four General Circulation Models (GCMs), the ET from 2001 to 2060 was predicted by the statistical model. Compared to the period of 1961-2000, the water consumption by ET will increase greatly in the future. According to the scenarios, the rise of Tmax (about 1.5℃ to 3.3℃) and Tmin (about 1.7℃ to 3.5℃) will cause an additional water con- sumption of 14.0%-17.8% for reed swamp. The ecological water demand in Zhalong Wetland will become more severe.