内陆半干旱平原盐碱区浅部地层耦合的电性表达及其与积盐强度的关联性--以呼包平原为例

Introduce physical geography methods, to research the electrical characteristic of shallow stratum and its formation coupling in inland semiarid plain land salinized region. Series of experiments are designed, from micro to macro level analyst, to capture the stratum information in different spatial scales: ①Micro level classification experiments are established, to study the electrical characteristics of fundemental mineral grain unit of shallow stratum, classify the electrical types of different fraction sizes in the stratum, and determine the "grady coefficient" and "standard half-life" of each fraction sizes; ② Use middle level testing simulation experiments, to study the electrical characteristics of each layers of shallow stratum, classify the electrical types of each layers, investigate the IP features of the stratum and its relationship with grain structure and penetrance, and investigate the electrical analyst methods of shallow stratum grain structure; ③Through macro level field experiments, to study the geoelectricity features of shallow stratum and its formation coupling with water level, investigate its relevance with salt accumulation intensity. The shallow stratum geoelectricity structure system of the researching region is established, and the salt accumulation intensity types according to the system is classified; by summarizing the research results of the geologic bodies in different spatial scales that were mentioned above, we investigate the electrical parameters that indicate the stratum formation coupling comprehensive salinization effect, to provide support for the monitoring, warning and controlling of soil salinization.

引入地球物理方法，研究内陆半干旱平原盐碱区浅部地层及其耦合的电性特征，设计了从微观到宏观分析的系列实验，捕捉不同空间尺度的地层信息：①通过微观分级测试实验，研究浅部地层的基本组成单元矿物颗粒的电性特征，进行地层粒级组分电性分类，确定各粒级组分的"粒级系数"和"标准半衰时"； ②通过中观模拟测试实验，研究浅部各层位地层的电性特征，划分地层的电性类型。探索地层的激电特征与其粒度结构、渗透率的关联性，探索浅部地层粒度结构的电性分析方法；③通过宏观现场实测实验，研究浅部地层及其与潜水面耦合的地电表现，并探索其与积盐强度的关联性。建立研究区浅部地层的地电结构体系，并进行地电结构成盐强度类型划分。综合上述各空间尺度地质体的研究成果，探寻反应地层耦合综合成盐效应的电性参数，为盐碱化监测、预警和治理提供依据。