Based on the triaxial shearing test in laboratory,the effect of soil water content and dry density on yellow soil shearing strength was determined. Experimental data indicated that: (1) the soil cohesive force firstly increase and then decrease with the increase of soil water content under the same soil dry density, and it increase with the increase of soil dry density under the same soil water content. The internal frictional angle of yellow soil fleetly decrease with the increase of soil water content under the same soil dry density, and it do not change obviously with the increase of dry density under the same soil water content. (2) The interaction of soil water content and dry density has significant impact on soil cohesive force,and the soil cohesive force reached to the maximum under the interaction of soil water content and dry density that each soil dry density matched the specifically soil water content. (3) The interaction of soil water content and dry density is small relatively on the internal frictional angle,and the internal frictional angle tardily increase with the increasing of soil dry density. Soil water content have relatively more obvious impact on the internal frictional angle, and the internal frictional angle of yellow soil nonlinearly decrease with the increasing of soil water content.%初步探讨了百花湖水体中氮的空间分布特征,并分析了氮及溶解氧(DO)的相关性.对8个站位的表层、4 m、8 m及12 m水体中总氮、氨氮、硝酸盐氮、亚硝酸盐氮及溶解氧进行了测定.结果表明,百花潮水体中总氮的平均含量为1.18 mg/L,氨氮的平均含量为0.144 mg/L,硝酸盐氮的平均含量为0.20mg/L,亚硝酸盐氮的平均含量为0.018 mg/L.百花湖入湖口附近的1号采样点总氮、氨氮和硝酸盐氮的平均浓度都较其它采样点高.分析表明百花湖中DO浓度与硝酸盐氮和亚硝酸盐氮呈负相关,相关系数分别为-0.629、-0.724.
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