吉兰泰盐湖防护体系地表蚀积特征

采用矩阵式插钎法对盐湖防护体系不同防护功能区地表进行野外观测，探究吉兰泰盐湖防护体系地表蚀积特征。结果表明：吉兰泰盐湖防护体系不同防护功能区地表蚀积月际变化呈现明显的波动性。流沙固阻带、封沙育草带主要以风蚀为主，防风阻沙带和盐湖防护林带主要以风积为主。地表沉积物质由外向内趋于细化。流动阻沙带和封沙育草带粒度组成主要以细砂和中砂为主；防风阻沙带和盐湖防护林带粒度组成主要以极细砂和细砂为主。盐湖防护体系表层沉积物平均粒径Φ值、分选系数、峰态和偏度分别为1.66～3.32,0.99～2.91,1.23～2.05和-0.08～-0.89。表层沉积物平均粒径、分选系数、偏度、峰态随着盐湖防护体系由外向内逐渐增加。总体看来，盐湖防护体系营建使地表沉积物趋于细化，有利于土壤细粒物质沉积，对地表起到一定保护作用。

Wind Erosion and Deposition Features on Surfaces in Jilantai Salt Lake Protection System

To explore wind erosion and deposition features on surfaces in Jilantai salt lake protection system. This study used the plugging-brazing method to observe the actual surface conditions of different protection function areas of the salt lake protection system. Our results showed: The monthly variation of surface erosion and deposition showed obvious fluctuation in different protective function zone of Jilantai salt lake protection system. Fixing shifting-sand zone and fencing dune for grass recovery zone were mainly wind erosion. Surface sediment material tended to be finer from outside to inside. Fixing shifting-sand zone and fencing dune for grass recovery zone are mainly composed of fine sand and medium sand; preventing wind and stopping sand zone and salt lake protection forest zone is mainly composed of very fine sand and fine sand. The average particle size, sorting coefficient, kurtosis and skewness of salt lake protection system ranged from 1.66 to 3.32, 0.99 to 2.91, 1.23 to 2.05 and -0.08 to -0.89. The average grain size, sorting coefficient, kurtosis and skewness of surface sediments increased gradually with salt lake protection system from outside to inside. In general, it appeared that the construction of the salt lake protection system tended to refine in surface sediment, which is conducive to the deposition of fine-grained soil material and played a protective role for the surface.