论文部分内容阅读
通过野外调查,实地测点以及土壤采样分析,以开都河流域下游绿洲为研究区,利用SPSS与DPS等软件对粒度参数特征值进行统计分析。研究结果表明:研究区土壤多为由以粉砂粒为主的质地组成,三层粒级百分含量合计平均值分别达85.92%,85.54%和84.23%;研究区粒度总平均值为6.30Φ;研究区内土壤颗粒分选系数总平均值为1.55Φ,分选性差;偏度总平均值为0.02Φ,多属近对称至正偏;峰态值总平均值为1.24Φ,偏高,呈现窄和较窄峰态,表明研究区土壤成土母质来源相对比较复杂;研究区的平均粒径与分选,分选与偏度呈负相关,平均粒径与偏度正相关,分选系数与峰态呈不显著负相关;平均粒径与偏度、偏度与峰度无相关性;研究区沉积环境主要是浅海、河湖相和河流沉积。
Through the field survey, field measurement and soil sampling analysis, taking the oasis in the lower reaches of the Kaidu River basin as the research area, the statistical analysis of the eigenvalues of the grain size parameters was carried out by using software such as SPSS and DPS. The results showed that most of the soils in the study area consisted of silt-dominated textures, with the average percentages of three-layer grain fractions reaching 85.92%, 85.54% and 84.23%, respectively. The average grain size of the study area was 6.30Φ. The average value of soil particle sorting coefficient in the study area is 1.55Φ, the sorting is poor; the average of the skewness is about 0.02Φ, most of them are near-symmetric to positive-skew; the average of the peak values is 1.24Φ, which is high Narrower and narrower kurtosis, indicating that the sources of soil parent material in the study area are relatively complex. The average grain size in the study area is negatively correlated with sorting, sorting and skewness. The average grain size is positively correlated with skewness. The sorting coefficient There was no significant negative correlation between kurtosis and kurtosis. Mean particle size and skewness, skewness and kurtosis were not correlated. Sedimentary environment in the study area was mainly shallow sea, lacustrine facies and river sediments.