河北张家口季节冻土温度水分时空演化相关性研究  

Temporal and Spatial Correlation of Temperature and Moisture in Seasonal Frozen Soil in Zhangjiakou, Hebei

作　　者：庞丽丽[1,2] 董翰川 冯建华[1,2] 李康 PANG Li-li;DONG Han-chuan;FENG Jian-hua;LI Kang(Center far Hydrogeology and Environmental Geology Survey, CGS, Baoding 071051, China;Innovation Center of Engineering Technology for Geological Environment Monitoring of Ministry of Natural Resources, Baoding 071051, China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051 [2]自然资源部地质环境监测工程技术创新中心,河北保定071051

出　　处：《土壤通报》2019年第2期310-315,共6页Chinese Journal of Soil Science

基　　金：国家重点研发计划课题3:场地污染在线监测传感器与数据采集器研发资助

摘　　要：河北张家口属于季节性冻土区,温度和水分是影响土体结构和强度的主要因素,因此研究土壤温度和水分变化相关性对于分析土体结构稳定性和工程建设具有重要意义。本研究采用国产智能化墒情监测设备,在张家口坝上与坝下过渡带选择一个典型坡面为研究区,采用垂向分层监测方法,对土壤进行温度和含水率观测,历时一个水文年。通过监测数据分析,探究季节性冻土不同土壤层温度、含水率随时间的变化以及纵向空间不同土壤温度梯度、含水率变化关系。研究表明:典型坡面0.6 m以上土壤层,受大气温度影响,并相对于大气温度变化滞后。0.75 m以下土壤层全年温度高于0℃,最大冻土深度为0.6 m。斜坡面以下0.3 m、0.75 m处含水率变化受气温影响最大,变化规律一致,但影响因素不同;斜坡表面以下0.45 m和0.6 m温度的变化对于土壤层含水率的变化影响较小,且不同层位影响程度不同。Zhangjiakou is a seasonal frozen soil area in Hebei Province. Temperature and moisture are the main factors affecting soil structure and strength. Therefore, it is important to investigate the correlation between soil temperature and moisture for analyzing the stability of soil structure and engineering construction. A typical slope surface was selected as the study area in the transition zone between Zhangjiakou dam and upper dam, and the soil temperature and water content were observed by the vertical stratified monitoring method for a hydrological year. The changes in temperature and water content with time were monitored at different layers of seasonal frozen soil, and their relationship was explored. The soil temperature above 0.6 m layers of typical slope was affected by the atmospheric temperature and lagged behind its change. The soil temperature below 0.75 m layers was above 0 ℃, and the maximum frozen soil depth was 0.6 m. Atmospheric temperature had the greatest influence on the soil water content at 0.3 m and 0.75 m depths below the slope surface, and the variation trend was the same, but the influencing factors were different. The influence of soil temperature on soil water content was different among different soil layers and the effect was little at 0.45 m and 0.6 m depths below the slope surface.

关 键 词：季节性冻土 温度 水分 相关性 

分 类 号：P314.5[天文地球—固体地球物理学]