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Journal of Geographical Sciences    2001, Vol. 11 Issue (2) : 239-243     DOI:
Article |
Effect of apple production base on regional water cycle in Weibei upland of the Loess Plateau
HUANG Ming-bin1, HE Fu-hong2, YANG Xin-min1, LI Yu-shan1
1. Institute of Soil and Water Conservation, CAS, Yangling 712100, China|
2. Northwest Sci-tech University of Agriculture and Forestry, Yangling 712100, China
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Abstract  

Weibei upland, located in southern part of the Loess Plateau, is a commercial apple production base in China. The enlargement of apple-planting area has a great impact on the regional water cycle. The effects of different land use on hydrological parameters are compared and studied in this paper. The main results are as follows: (1) The initial and steady infiltration rates in apple orchard are higher than those in other land use types such as grassland, idle land and farmland. Their initial rates of infiltration are 0.823 cm/min, 0.215 cm/min, 0.534 cm/min and 0.586 cm/min in apple orchard, grassland, idle land and farmland respectively. Their steady infiltration rates are 0.45 cm/min, 0.038 cm/min, 0.191 cm/min and 0.155 cm/min respectively. (2) There is no runoff generated in plot of apple orchard in all 8 storm events in observed natural rainfalls, while runoff is generated in winter wheat plot, corn plot and alfalfa plot with runoff coefficients of 2.39%, 1.58% and 0.31% respectively. (3) The transpiration of apple trees is strong and thus soil moisture is gradually depleted. The average soil water contents in 3-9 m soil profile in Changwu plots with apple trees of 14 and 32 years in age are 11.77% and 11.59% and in Luochuan plots with those of 15 and 28 years in age are 11.7% and 11.59% respectively, which are nearly 9.0% of wilting moisture of Changwu soil and 8.6% of wilting moisture of Luochuan soil. The pathway of rainfall percolating to groundwater is hindered by dry soil profile.

Keywords Loess Plateau      Weibei upland      water cycle     
PACS:  S157  
Fund:

National Natural Science Foundation of China, No. 49890330; Western Development Project of Chinese Academy of Sciences

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HUANG Ming-bin, HE Fu-hong, YANG Xin-min, LI Yu-shan. Effect of apple production base on regional water cycle in Weibei upland of the Loess Plateau[J]. Journal of Geographical Sciences,2001, 11(2): 239-243.
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http://www.geogsci.com/EN/     OR     http://www.geogsci.com/EN/Y2001/V11/I2/239


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