Abstract: Sand-moving wind regime, sand drift potential (DP) and sand transport amount are three important indices to reflect wind-blown sand activity intensity. This paper analyzes wind-blown sand activity intensity based on the recorded wind data at Ketu Sandy Land in eastern shore of the Qinghai Lake. The results are as follows: (1) The ratios of sand-moving wind occurring frequency were 0.40, 0.47 and 0.53 respectively from March to May in 2014. Sand-moving wind velocity for transportation of sand was mainly focused on 6-16 m·s^-1 which accounted for 91 percent in statistical time range. The high sand rising speed that was up to 16 m·s^-1 was in the time from 16:00 to 20:00. (2) The analysis of sand drift potential showed that the study area was belonging to high energy wind condition and the ratio of wind direction were both less than 0.3 during March and May, which indicated that the variability of wind direction had a great extent as well as not focused wind energy. So it was easy to be damaged for the road and grassland surrounding the Qinghai Lake from different directions. (3) The sand transport amount was 503.67 kg during the study period which included 16 directions, and the NE, ENE, E and ESE were account for 43.56 percent.

Key words: wind-blown sand activity, sand-moving wind regime, sand drift potential, sand transport amount