| 沙尘暴评估中土壤含水量概率分布模型研究 --以内蒙古中西部地区为例 |
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| 引用本文： | 李宁,顾卫,史培军,杜子璇. 沙尘暴评估中土壤含水量概率分布模型研究 --以内蒙古中西部地区为例[J]. 自然灾害学报, 2005, 14(2): 10-15 |
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| 作者姓名： | 李宁 顾卫 史培军 杜子璇 |
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| 作者单位： | 1. 北京师范大学,环境演变与自然灾害教育部重点实验室,北京,100875;北京师范大学,资源学院灾害与公共安全研究所,北京,100875
2. 北京师范大学,环境演变与自然灾害教育部重点实验室,北京,100875;北京师范大学,资源学院资源技术与工程研究所,北京,100875 |
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| 摘 要： | 根据内蒙古中部地区二连浩特,乌拉特中旗和乌海3个观测站2001年4月至2004年4月的逐时土壤含水量观测结果和相应的沙尘暴发生的实况,对沙尘暴发生时和没有沙尘暴发生时的土壤含水量,分别用正态分布、指数分布、伽马分布、瑞利分布、威布尔分布和耿贝尔分布函数进行了拟合,并根据相关系数和最小二乘法进行了拟合优度检验.结果表明,对内蒙古中部地区这3个地点而言,沙尘暴发生时的土壤含水量服从耿贝尔分布,沙尘暴不发生时的土壤含水量服从伽马分布.根据耿贝尔分布,建立了土壤含水量重现期的曲线拟合模型.
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| 关 键 词： | 沙尘暴 概率分布 土壤含水量 内蒙古中西部地区 拟合检验 |
| 文章编号： | 1004-4574(2005)02-0010-06 |
Study on probability distribution models of soil moisture for evaluation of dust storm:a case study in central Inner Mongolia of China |
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| LI Ning,GU Wei,SHI Pei-jun,DU Zi-xuan. Study on probability distribution models of soil moisture for evaluation of dust storm:a case study in central Inner Mongolia of China[J]. Journal of Natural Disasters, 2005, 14(2): 10-15 |
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| Authors: | LI Ning GU Wei SHI Pei-jun DU Zi-xuan |
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| Abstract: | Normal distribution, exponential distribution, Gamma distribution, Rayleigh distribution, Weibull distribution and Gumbel distribution are used to fit soil moisture for dust storm occurrence and no-dust storm occurrence from April 2001 to November 2004 in Erlianhaote, Wulatezhongqi and Wuhai, which are meteorological stations in western and central Inner Mongolia of China. The fitness is checked by correlation, probability distribution and estimate of least square test. The results show that soil moisture is subject to Gumbel distribution when dust storms occur, and subject to Gamma distribution when no-dust storms occur. A model for return period of soil moisture was established. |
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| Keywords: | dust storm probability distribution soil moisture western and central Inner Mongolia test |
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