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: 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/(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 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.

Key words: rainfall, rainfall erosion, sand-raise wind, sand drift potential, desert-losses ecotone, Jingbian County