新疆和田河流域柽柳沙堆的生物地貌发育过程(英文)

被引:13
作者
李志忠 [1 ,2 ]
武胜利 [2 ]
陈蜀江 [2 ]
陈秀玲 [1 ]
靳建辉 [1 ]
刘琦 [2 ]
机构
[1] College of Geographical Science,Fujian Normal University
[2] College of Geography Science and Tourism,Xinjiang Normal
关键词
Tamarix; Nabkha; biological geomorphology; development mechanism; Hotan River Basin; Xinjiang;
D O I
暂无
中图分类号
P931 [地貌学(地形学)];
学科分类号
摘要
Tamarix nabkha is one of the most widespread nabkhas,distributing in the arid region of China.Based on the observations outdoors and the simulation experiments in laboratories,analysis in this paper refers to the biological geomorphologic features and growth process of Tamarix nabkhas in the middle and lower reaches of the Hotan River,Xin- jiang.And the results indicate that the ecological type of Tamarix in the study area is a kind of Tugaic soil habitat based on the deep soil of the Populus Diversifolia forests and shrubs.This type of habitat can be divided into three kinds of sub-habitats which demonstrate the features of ecological environment of Tamarix nabkhas during the differential developed phases. Meanwhile,the Tamarix nabkha can exert intensified disturbance current on wind-sand flow on the ground,and its root and stems not only have strong potential of sprouting but are characteristic of wind erosion-tolerance,resistance to be buried by sand and respectively tough rigid of the lignified branches,for it has a rather longer life-time.Thus,the wind speed profile influenced by the Tamarix nabkha is different from the Phragmites nabkha and Alhagi nabkha.And the structure of the wind flow is beneficial to aeolian sand accumulating in/around Tamarix shrub,which can create unique Tamarix nabkhas with higher average gradient and longer periodicity of life.Tamarix nabkha evolution in the area experienced three stages:growth stage,mature and steady stage and withering stage.In each stage,morpho-logical features and geomorphic process of Tamarix nabkha are different due to the discrepant interaction between the nabkha and aeolian sand flow.
引用
收藏
页码:205 / 218
页数:14
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