中文摘要：

在来自 Fenghe 河的 74 件沉积样品的重金属的集中，通过西安从 Qinling 山和流动的北方发源， Shaanxi 省，中国，被采用印射的地理信息系统( GIS )描绘，模糊合成评价，并且象他们的潜力一样决定重金属的丰富特征的统计分析污染冒险到沉积的 multivariate 。艾尔， Cd，和公司是主要污染物质，与一个高丰富因素(EF ) 价值。从纸植物附近的样品的重金属集中在高水平被维持。艾尔， Ba， Cr， Ni， Pb，和公司的重要丰富在中流被发现并且下游地，当 Cu 的高集中发生在 headwater 时，流。基于簇和主要部件分析，沉积金属主要来自纸植物，农学的惯例，生来的来源，和旅游与 51.59% ， 23.01% ， 14.21% ，和 9.88% 的贡献，分别地。基于熵方法和毒性系数用模糊理论探索的沉积污染评价证明 26 ， 32 ，和 11 个地点掉进班 III (稍微弄脏)，班 IV (中等弄脏)，并且班 V (重重地弄脏)，分别地并且他们在弄脏的水平的会员度的分数在上升，在学习区域建议沉积金属污染的相对高的度。仔细与过多的工业、农业的应用有关，在沉积的金属污染是必要的在 Fenghe 河里被探讨。

英文摘要：

Concentrations of heavy metals in 74 sediment samples from the Fenghe River, which originates from the north of the Qinling Mountains and flows through Xi＇an, Shaanxi Province, China, were characterized by employing geographic information system（GIS）mapping, fuzzy synthetic assessment, and multivariate statistical analysis to determine the enrichment characteristics of heavy metals as well as their potential risks of pollution to sediments. Al, Cd, and Co were the major pollutants, with a high enrichment factor（EF） value. Heavy metal concentrations from samples near the paper plant were maintained at a high level. Significant enrichment of Al, Ba, Cr, Ni, Pb, and Co was found in the midstream and downstream, while high concentration of Cu occurred in the headwater stream. Based on the cluster and principal component analyses, sediment metals mainly came from the paper plants, agronomic practices, natural sources, and tourism, with a contribution of 51.59%, 23.01%, 14.21%, and 9.88%, respectively. Sediment pollution assessment explored using fuzzy theory based on the entropy method and toxicity coefficient showed that 26, 32, and 11 sites fell into Class III（slightly polluted）, Class IV（moderately polluted）, and Class V（heavily polluted）, respectively, and their scores of membership degree in the polluted level were on the rise, suggesting a relatively high degree of sediment metal pollution in the study area. Closely related to the excessive industrial and agricultural applications, metal pollution in sediment is necessary to be addressed in the Fenghe River.