Measurement of evapotranspiration of mixed bush and grass in headwater region of North China Plain

被引：0

作者：

Li, FD ^{[1
]}

Zhang, QY ^{[1
]}

Gao, KC ^{[1
]}

Xu, ZQ ^{[1
]}

Song, XF ^{[1
]}

机构：

[1] Chinese Acad Sci, IGSNRR, Ctr Agr Resources Res, Inst Genet & Dev Biol, Beijing 100101, Peoples R China

来源：

IGARSS 2005: IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-8, PROCEEDINGS | 2005年

关键词：

evapotranspiration; Bowen Ratio; Penman-Monteith method; crop coefficient; EVAPORATION;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Bowen ratio and energy balance (BREB) method is used to measure the evapotranspiration of mixed bush and grass in headwater re,lion of North China Plain. The results show that it is hard to observe the long-term data by BREB. To analyze the diurnal variation in the energy balance, three days (DOY 225, clear day. DOY 228, cloudy, fog in the morning, and 0.2mm of Precipitation, DOY 236, cloudy) in 2001 are selected from the growing period of vegetation. Actual evapotranspiration is 4.13, 0.95, and 3.38 mm/day, with mean value of 2.82 mm/day. Peak hourly ET is 0.66 mm/hour. Bowen ratio is 0.28, 0.30, and 0.35 on DOY 225, 228, and 236, respectively. The daily ET0 calculated by hourly Penmen-Monteith mothod on DOY 225, 228, and 236 is 4.68, 1.04, and 3.54 mm/day. Crop coefficient (Kc) is 0.88, 0.92, and 0.96, respectively. The variation of Kc is in agreement with the ET in clear day.

引用

页码：1322 / 1325

页数：4

共 6 条

[1]

Allen R. G., 1998, FAO Irrigation and Drainage Paper

[2]

Allen RG., 1994, ICID Bull, V43, P1, DOI DOI 10.12691/AJWR-5-4-3

[3] Crop coefficients and water-use estimates for sugarcane based on long-term Bowen ratio energy balance measurements [J].