| 引用本文: | 袁鸿猷,樊军,金沐,等.黄土高原淤地坝土壤水分和浅层地下水时空分布特征解析[J].灌溉排水学报,0,():-. |
| Yuan Hong-you,Fan jun,Jin Mu,et al.黄土高原淤地坝土壤水分和浅层地下水时空分布特征解析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探明黄土高原淤地坝的土壤水分和浅层地下水时空分布规律。【方法】依据电阻率成像法，利用高密度电法仪在陕西省神木市六道沟小流域2座淤地坝内布置多条测线测定了土壤电阻率分布，结合实测土壤含水率与浅层地下水位，探究淤地坝浅层地下水空间分布特征并估算其储量。【结果】土壤电阻率与土壤含水率呈显著幂函数关系（P<0.05），土壤电阻率随深度增加而减小，而浅表层土壤含水率随着深度的增加而逐渐增大，存在分层现象。从沟头至沟尾，A、B坝地的浅层地下水埋深逐渐增大，浅层地下水储量呈现沟尾大于沟头而中部最小的分布规律，且具有季节性变化的特征，冬末至次年夏季为土壤含水率消耗期，夏末秋初为蓄积期，夏季的储水量最小，其值分别为85 949、94 196 m3，冬季的储水量值达到最大，其值分别为93 486、99 309 m3。【结论】黄土高原淤地坝储存了一定的水量，并有明显的季节波动，未来应重视这部分水资源的调蓄利用。 |
| 关键词: 黄土高原；淤地坝；电阻率成像法；土壤电阻率；浅层地下水 |
| DOI： |
| 分类号:S152. 7 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Temporal and Spatial Distribution Characteristics of Soil Moisture and Shallow Groundwater in Check Dam of the Loess Plateau |
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Yuan Hong-you1, Fan jun1, Jin Mu1, Ma Lihui2
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1.College of Resources and Environment,Northwest A F University,Yangling Shaanxi;2.Institute of soil and water conservation, northwest agricultural and Forestry University
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| Abstract: |
| 【Background】The soil water in the check dam is an important factor affecting agricultural production and ecological environment construction in arid and semi-arid areas.【Objective】To explore the temporal and spatial distribution of soil moisture and shallow groundwater in the check dams on the Loess Plateau,【Method】based on electrical resistivity tomography, several sample lines were set up to measure soil resistivity in two check dams of Liudaogou small watershed in Shenmu, combined with the measured soil moisture and shallow groundwater depth, the study aims to investigate the spatial and temporal distribution characteristics of shallow groundwater in the check dam and estimate its storage.【Result】There is a significant power function relationship between soil resistivity and soil moisture content (P <0.05). The soil resistivity shows a decreasing trend with depth. The shallow surface soil moisture gradually increases with depth, and there is a stratification phenomenon. From gully head to gully tailing, the buried depth of the shallow groundwater in the dam A and B gradually increases, and the groundwater storage shows a distribution pattern where the gully tailing is larger than the gully head and the middle is the minimum. The changes of shallow groundwater storages is seasonal. The period from early winter to summer is the period of soil water consumption, and the supply period is from late summer to early autumn. Moreover, the minimum shallow groundwater is present to summer, their value are 85 949 and 93 486 m3 respectively, while shallow groundwater storage in winter is maximum, with values of 94 196 and 99 309 m3 respectively.【Conclusion】These is a certain amount of water in check dams, and the shallow groundwater has obvious seasonal fluctuations. In the future, it is necessary to pay attention to the regulation and utilization of the water resource. |
| Key words: Loess Plateau; check dam; electrical resistivity tomography; soil resistivity; shallow groundwater |
