毛乌素沙地中部不同类型沙丘土壤水分分布特征
通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地貌类型下0~4m深度内土壤水分的变化及分布特征。结果表明：灌木覆盖沙丘和乔木覆盖沙丘微地貌平均土壤含水量从大到小依次为丘间洼地、迎风坡、背风坡；裸露流动沙丘丘间洼地平均土壤含水量较高，但迎风坡和背风坡平均土壤含水量变化无明显规律；不同类型沙丘在各微地貌采样点不同层段土壤含水量变化差异明显，变化趋势不统一；同一沙丘微地貌条件下，植被对土壤含水量在垂向上的变化有较大影响，且灌木植被的影响大于乔木植被；迎风坡和背风坡土壤含水量表现为有植被覆盖的沙丘普...
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| Published in | 地球科学与环境学报 Vol. 37; no. 4; pp. 74 - 83 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
陕西师范大学 旅游与环境学院，陕西 西安 710119
2015
长安大学 西部矿产资源与地质工程教育部重点实验室，陕西 西安 710054 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室，陕西 西安 710061%陕西师范大学 旅游与环境学院,陕西 西安,710119%长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安,710054 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-6561 |
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| Abstract | 通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地貌类型下0~4m深度内土壤水分的变化及分布特征。结果表明：灌木覆盖沙丘和乔木覆盖沙丘微地貌平均土壤含水量从大到小依次为丘间洼地、迎风坡、背风坡；裸露流动沙丘丘间洼地平均土壤含水量较高，但迎风坡和背风坡平均土壤含水量变化无明显规律；不同类型沙丘在各微地貌采样点不同层段土壤含水量变化差异明显，变化趋势不统一；同一沙丘微地貌条件下，植被对土壤含水量在垂向上的变化有较大影响，且灌木植被的影响大于乔木植被；迎风坡和背风坡土壤含水量表现为有植被覆盖的沙丘普遍大于裸露流动沙丘，而丘间洼地处浅层基岩的存在对土壤含水量的影响更大；有植被覆盖的沙丘土壤含水量与土壤黏粒和粉砂等细粒级组分呈明显的正相关关系，沙丘地表植被通过拦截空气中的粉尘提高了土壤黏土和粉砂体积分数，从而提高了土壤含水量。 |
|---|---|
| AbstractList | P641.69; 通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地貌类型下0~4m深度内土壤水分的变化及分布特征。结果表明：灌木覆盖沙丘和乔木覆盖沙丘微地貌平均土壤含水量从大到小依次为丘间洼地、迎风坡、背风坡；裸露流动沙丘丘间洼地平均土壤含水量较高，但迎风坡和背风坡平均土壤含水量变化无明显规律；不同类型沙丘在各微地貌采样点不同层段土壤含水量变化差异明显，变化趋势不统一；同一沙丘微地貌条件下，植被对土壤含水量在垂向上的变化有较大影响，且灌木植被的影响大于乔木植被；迎风坡和背风坡土壤含水量表现为有植被覆盖的沙丘普遍大于裸露流动沙丘，而丘间洼地处浅层基岩的存在对土壤含水量的影响更大；有植被覆盖的沙丘土壤含水量与土壤黏粒和粉砂等细粒级组分呈明显的正相关关系，沙丘地表植被通过拦截空气中的粉尘提高了土壤黏土和粉砂体积分数，从而提高了土壤含水量。 通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地貌类型下0~4m深度内土壤水分的变化及分布特征。结果表明：灌木覆盖沙丘和乔木覆盖沙丘微地貌平均土壤含水量从大到小依次为丘间洼地、迎风坡、背风坡；裸露流动沙丘丘间洼地平均土壤含水量较高，但迎风坡和背风坡平均土壤含水量变化无明显规律；不同类型沙丘在各微地貌采样点不同层段土壤含水量变化差异明显，变化趋势不统一；同一沙丘微地貌条件下，植被对土壤含水量在垂向上的变化有较大影响，且灌木植被的影响大于乔木植被；迎风坡和背风坡土壤含水量表现为有植被覆盖的沙丘普遍大于裸露流动沙丘，而丘间洼地处浅层基岩的存在对土壤含水量的影响更大；有植被覆盖的沙丘土壤含水量与土壤黏粒和粉砂等细粒级组分呈明显的正相关关系，沙丘地表植被通过拦截空气中的粉尘提高了土壤黏土和粉砂体积分数，从而提高了土壤含水量。 |
| Abstract_FL | The study area is located in the central of Mu Us sandy land,which belongs to the semiarid climate area with the annual precipitation of 350-400 mm.On the basis of the field investigation in late April 2009,the sand dunes were divided into bare migratory dune,shrub-covered dune and tree-covered dune according to the vegetation form and vegetation coverage on the surface of sand dunes,and the samples of drilling holes in the depth of 4 m at different microtopographies of sand dunes including windward slope,leeward slope and inter-dune lowland were taken for analyzing the changes of soil moisture and soil granularity characteristics.The results show that the average soil moistures of different microtopographies for shrub-covered dune and tree-covered dune in descending order are inter-dune lowland,windward slope and leeward slope;the average soil moistures in inter-dune lowland are higher than those in leeward slope and windward slope in bare migratory dune,but the changes of average soil moistures of leeward slope and windward slope are irregular;the differences of soil moistures of sampling sites in vertical subsections from the microtopographies of sand dunes are significant,and the variation trends are diverse;vegetation form and surface coverage significantly affect the change of soil moistures under the same microtopography of sand dunes,and the effect of shrub is more than that of tree;soil moistures of leeward slope and windward slope in vegetation-covered dune are generally higher than those in bare migratory dune,and the shallow bedrock aquifuge affects sharply soil moisture in inter-dune lowland;the relationship between soil moistures in vegetation-covered dune and contents of fine-sized soil (clay and silt,etc.)is significantly positive,and the surface vegetation improves the volume fraction of clay by means of trap fine-grained atmospheric dust and holds moisture. |
| Author | 符超峰 赵景波 卞子浩 左俊 |
| AuthorAffiliation | 长安大学西部矿产资源与地质工程教育部重点实验室,陕西西安710054 陕西师范大学旅游与环境学院,陕西西安710119 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710061 |
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| Author_FL | BIAN Zi-hao ZHAO Jing-bo ZUO Jun FU Chao-feng |
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| DocumentTitleAlternate | Distribution Characteristics of Soil Moisture for Different Types of Sand Dunes in the Central of Mu Us Sandy Land |
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| Keywords | 土壤含水量 soil moisture windward slope 背风坡 inter-dune lowland vegetation 迎风坡 丘间洼地 sand dune Mu Us sandy land 沙丘 植被 leeward slope granularity 粒度 毛乌素沙地 |
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| Notes | The study area is located in the central of Mu Us sandy land,which belongs to the semiarid climate area with the annual precipitation of 350-400 mm.On the basis of the field investigation in late April 2009,the sand dunes were divided into bare migratory dune,shrub-covered dune and tree-covered dune according to the vegetation form and vegetation coverage on the surface of sand dunes,and the samples of drilling holes in the depth of 4 m at different microtopographies of sand dunes including windward slope,leeward slope and inter-dune lowland were taken for analyzing the changes of soil moisture and soil granularity characteristics.The results show that the average soil moistures of different microtopographies for shrub-covered＆amp;nbsp;dune and tree-covered dune in descending order are inter-dune lowland,windward slope and leeward slope;the average soil moistures in inter-dune lowland are higher than those in leeward slope and windward slope in bare migratory dune,but the changes of average soil moistures of |
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| Publisher | 陕西师范大学 旅游与环境学院，陕西 西安 710119 长安大学 西部矿产资源与地质工程教育部重点实验室，陕西 西安 710054 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室，陕西 西安 710061%陕西师范大学 旅游与环境学院,陕西 西安,710119%长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安,710054 |
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| Snippet | 通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地貌类型... P641.69; 通过对位于毛乌素沙地中部的乌审旗地区进行实地考察采样和室内试验测试分析，研究了裸露流动沙丘、灌木覆盖沙丘及乔木覆盖沙丘在迎风坡、背风坡和丘间洼地3种微地... |
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| Title | 毛乌素沙地中部不同类型沙丘土壤水分分布特征 |
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