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[1]YIN Ruiping,GUO Jianying,DONG Zhi,et al.Wind Velocity and Sand Flow Transport Characteristics of Different Height Typical Dunes in Ulan Buh Desert Along the Yellow River[J].Research of Soil and Water Conservation,2017,24(05):157-161.

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Wind Velocity and Sand Flow Transport Characteristics of Different Height Typical Dunes in Ulan Buh Desert Along the Yellow River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 05 Page number: 157-161 Column: Public date: 2017-10-28

Title:: Wind Velocity and Sand Flow Transport Characteristics of Different Height Typical Dunes in Ulan Buh Desert Along the Yellow River

Author(s):: YIN Ruiping¹, GUO Jianying¹, DONG Zhi², HE Jingli¹, LI Jinrong¹, TIAN Shimin³, DAI Yujie²; 1. Institute of Water Resources for Pastoral Area, Ministry of Water Resources, Hohhot 010010, China;
2. College of Forestry, Shandong Agricultural University, Taian, Shandong 271018, China;
3. Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China

Keywords:: wind velocity flow field; sand flow; wind profile; Ulan Buh Desert

CLC:: P931.3

DOI:: -

Abstract:: Flow fields of wind speed and aeolian transport are concerned by scientists because of its basic position in desert research. We took 3 typical dunes with different heights as samples and measured flow fields of wind， wind profiles， velocity accelerations， sediment discharges of 5 heights of different parts. Results show that: (1) wind velocity is greater over the top of dune but lowest at central leeward and appeares to increase firstly and decrease later and increase eventually from dune windward slope foot to leeward slope foot, showing the tendency of ‘S’ shape; (2) vertical changes of wind at different parts of dune and height changes of logarithmic follows the linear regression equation [V=aln(z)+b], slope of wind profile increases gradually from top of dune to slope foot of windward and leeward, friction velocity and roughness changes appear inconsistently; (3) wind velocity acceleration of low-rise (20 cm) is higher than high-rice; dune development scale impacts wind velocity acceleration of windward obviously, and feedback is significant with its growth; (4) sediment discharges of different dune parts within 0～100 cm show a uneven law of diminishing power function and concentrate in 0～10 cm, and distribute in 0～4 cm mostly. Relative sediment discharges are stable and do not transform with height changes.

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