Experimental Study of the Imbalance of Water Budget over the Loess Plateau of China
The imbalance of land-surface water budget was discovered in past studies, but there have been few further investigations on the relevant causes. To probe into the problem, annual variations of precipitation and land-surface evapotranspiration were analyzed by using the historical observation data f...
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Published in | Acta meteorologica Sinica Vol. 25; no. 6; pp. 765 - 773 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Heidelberg
The Chinese Meteorological Society
01.12.2011
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Subjects | |
Online Access | Get full text |
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Summary: | The imbalance of land-surface water budget was discovered in past studies, but there have been few further investigations on the relevant causes. To probe into the problem, annual variations of precipitation and land-surface evapotranspiration were analyzed by using the historical observation data from a compre- hensive land-surface observation base of LOPEX (Loess Plateau Experiment). A remarkable imbalance in the land-surface water budget was found, and the total annual imbalance reached 20.6%. Then, the impact factors related to additional water budget components and observational methods were studied. The total annual imbalance could be reduced to 3.8% by using a combination of compensated land-surface water bud- get components and the surface evapotranspiration values obtained from the large-scale weighing lysimeter rather than from the eddy correlation method. |
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Bibliography: | 11-2277/P The imbalance of land-surface water budget was discovered in past studies, but there have been few further investigations on the relevant causes. To probe into the problem, annual variations of precipitation and land-surface evapotranspiration were analyzed by using the historical observation data from a compre- hensive land-surface observation base of LOPEX (Loess Plateau Experiment). A remarkable imbalance in the land-surface water budget was found, and the total annual imbalance reached 20.6%. Then, the impact factors related to additional water budget components and observational methods were studied. The total annual imbalance could be reduced to 3.8% by using a combination of compensated land-surface water bud- get components and the surface evapotranspiration values obtained from the large-scale weighing lysimeter rather than from the eddy correlation method. ZHANG Qiang, WANG Sheng, WEN Xiaomei, and LI HongyuKey Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province/Key Open Laboratory of Arid Climatic Change and Disaster Reduction of CMAjInstitute of Arid Meteorology, CMA, Lanzhou 730020 Gansu Provincial Meteorological Service, Lanzhou 730020 Lanzhou University, Lanzhou 73(}000 Haoshan Meteorological Service, Shanghai 201901 (Received February 28, 2011; in final form September 30, 2011) Loess Plateau, water budget imbalance over land surface, water resources, evapotranspiration ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0894-0525 2191-4788 |
DOI: | 10.1007/s13351-011-0607-5 |