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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (3): 797-803    DOI: 10.7522/j.issn.1000-694X.2013.00114
Biology and Soil     
Rainwater Infiltration at Dunes under Various Rainfall Events in Sandy Land to the East of Qinghai Lake
LU Rui-jie1, TANG Qing-liang1, WEI Dian-sheng1,2, ZHANG Deng-shan1
1.Ministry of Education Key Laboratory of Environmental Change and Natural disaster,  Beijing Normal University, Beijing 100875, China;
2.Forest Industry General Bureau of Heilongjiang Province, Harbin 150008, China
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Abstract  

In arid and semi-arid areas, rainwater infiltration has significant effect on the soil moisture. Many factors such as precipitation, rainfall intensity, and antecedent soil moisture play important roles in the rainwater infiltration. Based on the monitoring data from 08/2009 to 12/2010, we analyzed the rainfall characteristics and its infiltration at dunes under various rainfall events in sandy land to the east of Qinghai Lake. The results showed that infiltration took place only when precipitation reached a critical value. The critical value for active dune, fixed dune and active dune with artificial measurement (artificial vegetation and straw checkers) were 5.6 mm, 1.6 mm and 0.2 mm, respectively. In the case of same rainfall, the cumulative infiltration of the active dune with artificial measurement was the largest, followed by the fixed dune and the active dune, and it increased with increasing rainfall. When the precipitation and antecedent soil moisture was similar for a certain sand dune, its infiltration would increase with increasing rainfall intensity, especially in the small rainfall event, whereas in the large event the precipitation became the determinant factor. For the similar precipitation pattern, infiltration had inverse correlation with antecedent soil moisture. The time for the infiltration of water to be consumed grew with increasing rainfall, particularly after rainfall exceeding 10 mm it increased rapidly.

Key words:  rainfall      infiltration      soil moisture      active dune      fixed dune     
Received:  01 March 2012      Published:  06 April 2012
ZTFLH:  S152.7  

Cite this article: 

LU Rui-jie1, TANG Qing-liang1, WEI Dian-sheng1,2, ZHANG Deng-shan1. Rainwater Infiltration at Dunes under Various Rainfall Events in Sandy Land to the East of Qinghai Lake. JOURNAL OF DESERT RESEARCH, 2013, 33(3): 797-803.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00114     OR     http://www.desert.ac.cn/EN/Y2013/V33/I3/797

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