干旱区生态环境知识资源中心(Arid): 沙漠-黄土过渡带风水复合侵蚀营力特征以靖边县为例

Arid

	沙漠-黄土过渡带风水复合侵蚀营力特征以靖边县为例
其他题名	Wind and Water Erosive Forces in a Desert-loess EcotoneA Case Study in Jingbian County,Shaanxi Province
	杨岩岩 1; 刘连友 1; 曹恒武 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2012
卷号	29 期号:4 页码:692-698
中文摘要	以北京师范大学陕西省靖边县榆林风沙科学野外实验站自动气象站2007-2009年的降雨、风速和风向数据为基础,分析沙漠-黄土过渡带风水复合侵蚀营力的特征。结果表明:①研究区年内降雨量≥12 mm的降雨事件主要分布在5-9月,月平均降雨侵蚀力8月最大,为318.24 MJ.mm/(hm~2.h.a),年平均降雨侵蚀力为510.08 MJ.mm/(hm~2.h.a);②该区西北风占主导地位,东南风次之,累计频率分别为43.8%和16.21%;起沙风主要集中在3-6月,其频率分别为19.34%、12.34%、20.5%、12.39%;③研究区年平均输沙势(DP)、合成输沙势(RDP)分别为228.76 VU、41.73 VU,合成输沙方向(RDD)为141.17°,方向变率指数(RDP/DP)为0.2,起沙风变率较大,属于中等风能环境,沙物质向东南偏南方向输移。
英文摘要	In this study,a case study was carried out to research rainfall erosion,wind regime and resultant sand-transporting potential in Jingbian County located in a desert-loess ecotone in Shaanxi Province during the period from 2007 to 2009.The results are as follows: ① The rainfall events with precipitation ≥12 mm occurred during the period from May to September,the monthly rainfall erosion was the highest in August(318.24 MJ·mm/(hm~2·h·a)),and the average annual rainfall erosion was 510.08 MJ·mm/(hm~2·h·a);② The direction of prevailing wind in the study area was northwest,then southeast,and their cumulative frequencies were 43.8% and 16.21%.The sand-raise wind(6-9.9 m/s) occurred mainly during the period from March to June,and the occurring frequencies in these months were 19.34%,12.34%,20.5% and 12.39% respectively;③ The average sand drift potential(DP) and resultant sand drift potential(RDP) were 228.76 VU and 41.73 VU respectively,the RDP/DP of wind direction was 0.2,and the resultant sand drift direction was 114.17°.All these show that the study area is in a moderate wind energy environment,the variability of monthly wind direction was high,and sand was transported southeastward.
中文关键词	降雨 ; 侵蚀力 ; 起沙风 ; 输沙势 ; 沙漠-黄土过渡带 ; 靖边县
英文关键词	rainfall rainfall erosion sand-raise wind sand drift potential desert-losses ecotone Jingbian County
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4585047
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228052
作者单位	1.北京师范大学减灾与应急管理研究院, 北京 100875, 中国; 2.中国农业科学院农业资源与农业区划研究所, 呼伦贝尔草原生态系统国家野外观测研究站, 北京 100081, 中国
推荐引用方式 GB/T 7714	杨岩岩,刘连友,曹恒武. 沙漠-黄土过渡带风水复合侵蚀营力特征以靖边县为例[J]. 北京师范大学,2012,29(4):692-698.
APA	杨岩岩,刘连友,&曹恒武.(2012).沙漠-黄土过渡带风水复合侵蚀营力特征以靖边县为例.干旱区研究,29(4),692-698.
MLA	杨岩岩,et al."沙漠-黄土过渡带风水复合侵蚀营力特征以靖边县为例".干旱区研究 29.4(2012):692-698.