| 引用本文: | 鲁瑞洁,唐清亮,张登山,石昊,赵爱斌.2010.青海湖湖东克土沙区固定沙丘土壤水分动态变化的初步研究[J].地球环境学报,(3):183-188 |
| LU Rui-jie,TANG Qing-liang,ZHANG Deng-shan,SHI Hao,ZHAO Ai-bin.2010.A preliminary study on dynamics of soil water content of the fixed dune in Ketu sand land on the east ofQinghai Lake[J].Journal of Earth Environment,(3):183-188 |
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| 摘要: |
| 本文通过土壤水分观测，结合降水记录及地表沉积物粒度分析，对青海湖湖东克土沙区
固定沙丘不同地貌部位土壤水分的时空变化规律进行了初步研究。结果表明：0~100 cm 深度内，
丘间地的土壤含水量最高，丘顶与背风坡次之，迎风坡最低。迎风坡丘间地与迎风坡脚受地下水
的影响，分别以40 cm 和100 cm 为界，土壤含水量在界限以上变化不大，界限以下随着深度增
加而迅速增大。其它地貌部位土壤水分来源主要是大气降水，0~20 cm 土壤含水量都随土壤深度
增加而增加，20 cm 以下则表现出不同的变化规律。 |
| 关键词: 土壤水分 固定沙丘 降雨量 时空变化 |
| DOI：10.7515/JEE201003005 |
| CSTR： |
| 分类号:P426.68; P941.73 |
基金项目:国家科技支撑(2007BAC30B03)；农业科技成果转化资金项目
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| A preliminary study on dynamics of soil water content of the fixed dune in Ketu sand land on the east ofQinghai Lake |
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LU Rui-jie1, TANG Qing-liang1, ZHANG Deng-shan1, SHI Hao1, ZHAO Ai-bin2
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1. Key laboratory of Environmental Changes and Natural Disaster, the Ministry of Education of China, Beijing Normal
University, Beijing 100875, China; 2. College of Life Sciences, Beijing Normal University, Beijing 100875, China
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| Abstract: |
| By observing soil water content, integrating rai nfall monitoring and surface sediments particle
size analysis, we preliminarily studied the dynamics of soil water content at different geomorphological
locations of the fixed dune in Ketu sand land on the east of Qinghai Lake. The results showed that
from 0~100 cm the soil water content of the interdunal areas was the highest, dune top and leeward
slop was the second, and windward slop was the lowest. On the vertical profi le, under the infl uence of
groundwater, both the dune slack next to the windward slope and the feet of windward slope had critical
depth, separately, 40 cm and 100 cm. Above the critical depth, the soil water content changed little,
whereas below it the soil water content increased rapidly with depth. While the soil water content of
other geomorphological locations, whose major source was precipitation, increased with depth during
0~20 cm, while the changes were complicated below 20 cm. |
| Key words: soil water content fi xed dune precipitation temporal and spatial variation |
