【摘要】 了解土壤湿度的空间变异规律对于提高土壤水分相关研究的精度与水平是至关重要的。以土壤湿度的空间变异为二维场变化,研究其空间结构(相关域)及其时间稳定性。并在满足样本独立性的前提下,研究作为随机变量的土壤湿度的概率分布函数。结果表明,在大多数情况下它是遵从正态分布的。在此基础上,对测点数与测量精度的关系进行了精确估算。此外,结果还显示出,在蒸散强烈的绿洲地区,引起土壤湿度空间变异的第一位原因是蒸散的空间非均匀性。更多还原

【Abstract】 To understand the spacial variation patterns of soil humidity is very impor-tant in improving the accuracy of correlation study of soil moisture andlevels,The spacial variation patterns of soil humidity is a two-dimentionalfield change in studying its spacial structure(correlation fields)and time sta-bility.In the prerequisite of meeting the needs of sample individuality,studiescan be taken as the function of probability distribution of the random variablesof soil humidity.The results showed that in most cases,it followed the nor-mal distribution,on the basis of which we estimated the numbers of surveyingpoints and accuracy.In addition,the results also indicated that the first rea-son that causes the spacial variations of soil humidity is the spacial non-uniformity of evaportianspiration in the oasis regions where evaporation isthe strongest.更多还原