Wind Regime and Dune Field Patterns in the Gonghe Basin, Qinghai, China

doi:10.7522/j.issn.1000-694X.2017.00014

Journal of Desert Research ›› 2018, Vol. 38 ›› Issue (3): 492-499.DOI: 10.7522/j.issn.1000-694X.2017.00014

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Wind Regime and Dune Field Patterns in the Gonghe Basin, Qinghai, China

Chen Zongyan^1,2, Dong Zhibao¹, Wang Qingchun³

1. School of Geogrophy and Tourism/National Demonstration Center for Experimental Geography Education, Shaanxi Normal University, Xi'an 710119, China;
2. College of Life and Geography Science, Qinghai Normal University, Xining 810008, China;
3. Climate Center of Qinghai Province, Xining 810001, China

Received:2016-11-28 Revised:2017-03-14 Online:2018-05-20 Published:2018-11-06

Abstract

Abstract: Based on the wind data collected from automatic meteorological stations of Chaka, Gonghe and Guinan in the Gonghe Basin, this paper analyzed the variation characteristics of wind speed, wind direction and sand drift potential. Combining with high resolution images of Google Earth, the relationship between wind regime and aeolian geomorphology is discussed. The results are as follows:(1) The annual mean wind speed ranges in 1.6-2.7 m·s^-1 in the Gonghe Basin. The frequency of threshold wind in northwest region, middle region and southeast region were 7.7%, 3.5% and 0.9%, respectively. The threshold wind mainly occurs in the winter and spring. Its direction is mainly WNW and W. (2) The wind energy is low. The sand activity weakens from northwest to southeast in the Gonghe Basin. The wind direction variability ranges in 0.7-0.96, and wind regime is narrow unimodal or wide unimodal. The wind direction variability belongs to high ratio in northwest region and middle region, but in southeast region, it belongs to intermediate. RDP is almost the same, and its value ranges in 281°-287.1°. (3)Dune field patterns conclude barchans dunes, reticulate dunes, compound dunes chain, mega dunes, longitudinal dunes and parabolic dunes etc. That fits well with wind regime in the Gonghe Basin.

Key words: Gonghe Basin, wind regime, sand drift potential, aeolian geomorphology

CLC Number:

P931.3

Chen Zongyan, Dong Zhibao, Wang Qingchun. Wind Regime and Dune Field Patterns in the Gonghe Basin, Qinghai, China[J]. Journal of Desert Research, 2018, 38(3): 492-499.

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Wind Regime and Dune Field Patterns in the Gonghe Basin, Qinghai, China

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