典型地区土壤电阻率的时空特性研究

土壤电阻率是接地工程设计及其腐蚀状态评价不可或缺的参数。通过测量分析全国150个典型土壤地区土壤电阻率,基于Kriging方法推算出未测量区域的土壤电阻率,绘制了全国各种地质地貌条件下春季土壤电阻率分布图及夏、秋、冬季土壤电阻率季节变化系数分布图,并分析了土壤电阻率的时空特性及其原因。结果表明,从季节上看,全国大部分地区土壤电阻率在夏季最小,冬季最大,而乌鲁木齐等地在春季最小,夏季最大;从区域划分上看,西北地区等土壤电阻率偏高,且季节变化明显,华中、华东大部地区土壤电阻率较低,季节性变化不明显。该研究结果能为接地工程设计、丰富电力大数据等提供数据支撑和理论参考。

Study on Spatiotemporal Property of Soil Resistivity in Typical Regions

The soil resistivity is an indispensable parameter to the grounding grid engineering design and its corrosion evaluation. We measured the soil resistivity of 52 typical cities in China, calculated the unmeasured area based on the Kriging method, and drew soil resistivity distribution diagram of spring and the seasonal correction coefficient distribution chart of summer, autumn and winter in the various geological and geomorphological conditions. Meanwhile, we analyzed the spatiotemporal property of soil resistivity and its causes. The results show that from the seasonal point of view, the soil resistivity of most regions of the country reaches its minimum in summer while maximum in winter; but minimum of Urumqi and other places is in spring, while maximum in summer. From the regional point of view, soil resistivity in Northwest China is on the high side, and its seasonal change is obvious, but the situation in most parts of Central China and Eastern China is just on the contrary. The research results will be of certain values for references to the design of grounding grid engineering and enriching the electric power big data.