IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
Alternative TitleCharacteristics of low-lying wet-grassland evapotranspiration in the middle reach of the inland river basin of Northwest China
吴锦奎; 丁永建; 王根绪; 沈永平
Corresponding Author吴锦奎
Source Publication中国生态农业学报
Other Abstract



Low-lying wet-grasslands characterized both as grasslands and wetlands possess irreplaceable ecological functions in the inner river basins of Northwest China.Bowen-Ratio Energy Balance(BREB)method was used to calculate evapotranspiration(ET)based on meteorological data from low-lying wet-grassland in the middle reach of the Heihe River basin in Hexi Corridor.Results reveal that ET rate for the period 2003 to 2004 for the wet-grassland is 611.5mm/a and 1.67mm/d.ET varies with different growth stages,with 0.57mm/d in No Growth Stage(NGS),2.01mm/d in Initial Growth Stage(IGS),3.82mm/d in Middle Growth Stage(MGS) and 1.49mm/d in End Growth Stage(EGS).ET for the four growth stages mentioned above respectively accounts for 18.26%,9.20%,61.83% and 10.71% of the total annual ET.In March,ET begins to increase,and with the growth of grass in June,it increases sharply,reaching its maximum in July.After July,ET decreases gradually.In Sept.,ET decreases rapidly and stops at EGS in mid Nov.,which happens at the freezing of the soil until Feb.of the following year.Hourly ET analysis shows that evapotranspiration begins at 7:00(for MGS) or 8:00(for EGS),and rises to a maximum value at 13:00,then finally ends at 19:00(for EGS) or 20:00(for MGS).ET intensity on sunny days is always much higher than that on cloudy days for the same growth stage.

Keyword水文学 蒸散 低湿草地 干旱区 内陆河流域
Subject AreaS812.1
Indexed ByCSCD ; 北大中文核心
Funding Organization中日合作黑河流域水文过程研究 ; 中国气象局气候变化专项(CCSF-2005-2-QH39)
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
吴锦奎,丁永建,王根绪,等. 干旱区内陆河流域中游低湿草地蒸散特征[J]. 中国生态农业学报,2007,15(4):18-21.
APA 吴锦奎,丁永建,王根绪,&沈永平.(2007).干旱区内陆河流域中游低湿草地蒸散特征.中国生态农业学报,15(4),18-21.
MLA 吴锦奎,et al."干旱区内陆河流域中游低湿草地蒸散特征".中国生态农业学报 15.4(2007):18-21.
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