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[1]WANG Le,LI Gai-xin,WANG Ren-de,et al.Morphology and Sedimentary Characteristics of Nebkhas in Semi-Arid Farmland[J].Research of Soil and Water Conservation,2014,21(01):76-80.

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Morphology and Sedimentary Characteristics of Nebkhas in Semi-Arid Farmland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 01 Page number: 76-80 Column: Public date: 2014-02-28

Title:: Morphology and Sedimentary Characteristics of Nebkhas in Semi-Arid Farmland

Author(s):: WANG Le¹, LI Gai-xin², WANG Ren-de³, CHANG Chun-ping¹, PENG Shuai¹; 1. Hebei Key Laboratory of Environmental Change and Ecological Construction, College of Resources and Environment Sciences, Hebei Normal University, Shijiazhang 050024, China;
2. Shijiazhuang Preschool Teachers College, Shijiazhang 050228, China;
3. Institute of Geographical Science, Hebei Academy of Sciences, Shijiazhuang 050011, China

Keywords:: nebkhas; farmland; field observation; semi-arid area

CLC:: P931.3

DOI:: -

Abstract:: The morphology and sedimentary characteristics of the Nebkhas in semi-arid farmland was studies by means of field observation and sampling. The results show that the Nebkhas in the area is huge and long and stretches along the ridges, with the horizontal scale of 4.4 m and the length-width ratio of 1.5. The moisture and the hardness of the Nebkhas vary in different parts of the farmland. The moisture in the east of the Nebkhas is the greatest, being 10.19% and the hardness is the smallest, being 4.12 kg/cm²; the moisture in the south is the smallest, being 1.03% and the hardness is the greatest, being 15.9 kg/cm². The top of the Nebkhas is moister and harder and the bottom is harder, too. The average particle size and the sorting of the Nebkhas are lower than those of the surrounding farmland, which gradually decrease in the sequence of windward slope foot- in the windward slope-the top- in the leeward slope. The particle sizes of vertical profile gradually increase with the depth and the sorting reduces. In addition to the three main factors of vegetation cover, wind strength, and sand, farming is an important factor which influences the formation and evolution of farmland nebkhas.

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