黄河冰凌地电预警技术初探

Preliminary Study on Geo-electricity Early Warning of Yellow River Ice Slush

以黄河济南段冰凌研究为例,采用地电测试方法对黄河凌汛期典型断面进行了流凌量测试,结果显示:(1)电测深曲线的高频部分与流凌量具有明显的数量关系,高频数值越高,河水中冰凌含量越多,视电阻率值也越大;反之,则流凌量少,故高频曲线与低频曲线的差异可反映河道流凌量的多少.(2)对于同一断面,流凌与未结冰相比,曲线高频部分的弯曲特征(曲率)相似,低频部分的弯曲特征(曲率)也相似.研究结果说明,以电测深曲线分解后的高频曲线和低频曲线作为黄河冰凌预警识别指标是可行的.

Taking study on ice slush of Jinan section in Yellow River for example, the flood period of ice slush was tested and analyzed by geo-electricity testing. Two important conclusions were summarized as follows： Firstly, the high-frequency of electrical sounding curve is apparent quantitative relationship with the ice water flow. The value of high-frequency section higher and the content of ice in river bigger, the value of apparent resistivity will bigger, on the contrary, the ice water flow will less. Therefore, the real time variation of the ice water flow in river can be reflected with the difference between high-frequency curve and low-frequency curve. Secondly, whether there is slush in river or not, the curvature of high-frequency and low- frequency sections are similar in the same contour. The results indicate that the high-frequency of electrical sounding curve and low-frequency characters can be used as the early-warning recognition indexes of Yellow River ice slush.