研究了引黄水库沉沙条渠泥沙沉积物的表面微观形貌和孔表面分形特征。采集了引黄供水鹊山水库沉沙条渠6个泥沙沉积物样品，对其粒径、形貌、孔隙结构、表面元素分布及分形特征进行分析，目的是考察由不同模型计算的颗粒孔表面分形维数和标度空间存在差异的原因，探讨这些颗粒表面微观形貌对其表面元素分布的影响。结果表明，泥沙沉积物颗粒的平均粒径约为18～83 u m，主要以黏粒、粉砂和细砂粒为主;表面形貌和孔隙分布复杂多样，其BET比表面积约8.248～31.60m2/g，孔隙尺寸分布范围较宽(1.870～60.78nm)，平均孔径约3.977～7.850nm。采用热力学模型和分形FHH模型计算出的孔表面分形维数Ds约为2.67～2.89，标度空间一般在数nm到数十nm，但不同模型计算所得结果存在一定的差异，其主要原因是泥沙沉积物颗粒的孔尺寸分布不均一。基于孔尺寸分布数据计算的Ds约为2.12～2.60，其与分形FHH模型计算出的对应结果越接近，孔分布对Ds的贡献越大。此外，颗粒的复杂表面形貌对各元素分布有较强的影响，这是颗粒表面形貌的高度不均一性导致表面吸附位分布不均的结果。
With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new admini...
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With the wetland landscape in New Coastal District of Tianjin City as the chief study objective and based on the remote sensing and non-remote sensing data of ETM/TM with 1999-2007 as the time scale and the new administrative region of New Coastal District as the space (scale) scope, this paper conducted the study on the landscape pattern change. The results showed that the natural wetland and agricultural land tended to decrease, while the saltern, maricultural areas and construction land increased apparently. The overall landscape shape tended to develop in simplification and regulation and with the development of population and social economy, human’s intervention to the landscape was getting improved.
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