中文摘要：

渗透系数是重要的水文地质参数之一,其大小直接或间接地影响着地表水与地下水的转化能力,准确推算湿地床渗透系数具有重要的意义。以博斯腾湖湿地为研究对象,将博斯腾湖湿地分为黄水沟区、大湖区、小湖区3个单元,分别采用野外现场竖管试验法和室内颗粒分析法对其沉积物渗透系数进行测定。结果表明：（1）2种实验方法均显示,博斯腾湖湿地3个单元沉积物渗透系数大小关系为：K_（大湖）〉K_（黄水沟）〉K_（小湖）;（2）对博斯腾湖湿地沉积物颗粒粒度进行分析发现,湿地沉积物主要以黏土为主,砂土次之。3个单元黏土含量关系为：大湖区〈黄水沟区〈小湖区,沉积物渗透系数与黏土含量呈负相关关系;（3）对沉积物渗透系数进行空间变异性分析得知,博斯腾湖湿地沉积物渗透系数自西向东、自北向南依次递增,渗透系数最高的地段主要集中在白鹭洲附近。

英文摘要：

Permeability is an important hydrogeological parameter, directly and indirectly affecting the storage ca- pacities of surface and groundwater. Thus, it is important to accurately determine the permeability of wetland soils and sediments. Bosten Lake is a key water resource of Bayangol Mongol Autonomous Prefecture in Xinjiang and plays a vital role in maintaining the local ecology, economic development and social stability. In this study, we in- vestigated the permeability of sediments in Bosten Lake wetland using wild field standpipe testing and laboratory particle analysis. The results were then used to analyze the spatial variation in sediment permeability. From Novem- ber 7 - 11,2015, wild field standpipe tests were carried out at three units of the Bosten Lake wetland： Huangshui- gou, Great Lakes, and Small Lakes, with three sites in each unit. Sediment samples collected at 10 cm, 20 cm and 40 cm from each site were transported to the lab for analysis. Results show that ： （ 1 ） Wild field standpipe testing gave sediment permeability coefficient ranges for Great Lakes, Huangshuigou and Small Lakes of 0. 01 - 10.83 m/d, 0.01 -0.20 m/d and 0.01 -0.09 m/d, with an overall average value of 1.54 m/d, and the permea- bility decreased with increasing sediment depth. （2） Particle analysis indicated that sediments in Bosten Lake wet- land were mainly clay, followed by sand. The order of clay content in the three units was as follows ： Great Lakes 〈 Huangshuigou 〈 Small Lakes, and the permeability coefficient was negatively correlated with clay content. Based on laboratory analysis, the average permeability coefficient was highest in Great Lakes （3.89 m/d ） , followed by Huangshuigou （0.77 m/d） and Small Lakes （0.02 m/d）, consistent with the order obtained by field measure- ments. （3） The permeability of sediments in the Bosten Lake wetland increased from west to east and from north to south, with the highest permeability coefficient in the area near Bailu Shoal.