干旱区研究2012，Vol.29Issue(4)：692-698,7.
沙漠-黄土过渡带风水复合侵蚀营力特征——以靖边县为例
Wind and Water Erosive Forces in a Desert-loess Ecotone --A Case Study in Jingbian County, Shaanxi Province
摘要
Abstract
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： ①The 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/ （hm2 . h . a） ], and the average annual rainfall erosion was 510.08 MJ. mm/（ hm2 .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 oc- curring 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.关键词
降雨/侵蚀力/起沙风/输沙势/沙漠-黄土过渡带/靖边县Key words
Countyrainfall/rainfall erosion/sand-raise wind/sand drift potential/desert-losses ecotone/Jingbian分类
农业科技引用本文复制引用
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].干旱区研究,2012,29(4):692-698,7.基金项目
国家自然科学基金“沙生植物构型特征抗风蚀机理研究” （）
