• 责任者：Dang Shuqing (Laboratory of Earth Surface Process and Environment ; School of Geographic and Oceanographic Sciences ; Nanjing University ; Nanjing 210093 ; China) ; Han Zhiyong
• 刊名：Quaternary Sciences
• 出版年：2013
• 卷期：33(2)
• 关键词：风成地貌 ; eolian features ; 鄱阳湖 ; Poyang Lake
• 页码：p.388-397
• 图表：illus., 2 tables, 45 refs.
• 分类号：1400
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

IN: 0cm 0cm 0pt">ize=3>imes New Roman">The sand hill on the shore of the Poyang Lake is generally regarded as a large scale wind accumulated landform formed in a humid region. The Shaling sand hill ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">（imes New Roman"> 29.361 ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">°imes New Roman"> N, 116.016 ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">°imes New Roman">Eii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">）imes New Roman"> , covering an area about 10km2 in Xingzi County of Jiangxi Province, belongs to a high energy environment and has a narrow unimodal directional variability. The unique linear wind eroded landforms are developed and aligned along the dominant northeast wind, which indicating the environment has undergone significant changes. However, the evolution of these wind eroded landforms has not been studied. We explore the classification of the linear eroded landforms based on field observation and the age determination. Our field geomorphological survey confirms that the linear wind eroded landforms can be divided into 4 typesii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">：imes New Roman"> blowout, wind eroded trough, wind eroded ridge and wind eroded relic mound. We put forward an evolution mode through analyzing the morphological characteristics, distribution and interrelation of the 4 types of wind eroded landforms. The so-called 3 Phases and 2 Stages Mode can depict the evolution of wind eroded landform. The blowouts firstly formed during Phase 1, and then the wind eroded troughs and ridges developed during Phase 2,the wind eroded relic mounds lastly shaped during Phase 3. So far the Stage 1 of evolution of wind eroded landforms ended and the old ground represented by the top of the wind eroded relic mounds was almost eroded away. A new relatively plat ground appeared, where the new blowouts formed, which belongs to another generation,/, e. Phase 1 of Stage 2. Optically stimulated luminescenceii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">（imes New Roman">OSLii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">）imes New Roman"> dating is carried out on 3 profilesii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">（imes New Roman"> LS1, LS2, and LS3 ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">）imes New Roman"> and 4 typical landforms ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">（imes New Roman"> YD1, YD7, TB1, and TB4ii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">）imes New Roman">. The formation age of wind eroded landforms can be estimated by comparing the stratigraphical ages of the correlated sediments leeward, such as the depositional lobe with the erosional walls. 19 OSL ages show that the wind erosion of Stage 1 occurred ca. 6 7ka ago and the Stage 2 occurred ca. 0.3ka ago. By correlating the landform evolution with the literature records of climate change and human activity,we find that the development of wind eroded landforms during Stage 1 may be ascribed to the strengthened prehistoric human activity during the Middle Neolithic in this region, and that during Stage 2 are due to the firewood mowing in Qianlong Period of the Qing Dynasty. We conclude that the leading factor inducing the wind erosion in this humid region is the human activity.