摘要
针对2019年12月10日盐源县龙洞河地下水位发生异常,外围水坝突然断流,短时间内蓄水区水位急剧下降的现象,从连续异常变化和数据资料两个方面对异常进行分析,认为异常发生的基础是异常区域近年来降雨总体偏少,主要原因是季节性的降雨不足;同时,在对比分析两个采样时间相隔近15年的干海井井水样品时发现SO_(4)^(2-) 含量的增加最为明显,这可能是异常区域岩溶系统向深部发育的重要标志;地下水的容纳空间向深部扩大,是造成本次水位异常的次要原因。
On December 10,2019,groundwater level in the Longdong River in Yanyuan County started to be ab-normal,which characterized by the sudden cessation of surrounding dams and sharphy dropping of water level in the impoundment area within a short period.This paper analyzos the anomaly at two apects such as continuous tracking of anomalous changes and the data.We suggest that the basis of the anomaly occurrence i related to the less rain-fall in the abnormal area in recent years,which might be further explained by insufficient seasonal rainfall.Moreo-ver,the SO_(4)^(2-) in Ganhai well measured by a 15-year interval inereased obviously,which could be considered to be an important sign for the deep development of the karst system in the abnormal area.The expansion of the groundw-ater providing space for the deep part is the secondary cause of the abnormal changes of the water level.
作者
蒋川
陈碧洪
马付红
JIANG Chuan;CHEN Bihong;MA Fuhong(Xichang Earthquake Monitoring Center Station of Sichuan Earthquake Agency,Sichuan Xichang 615022,China)
出处
《四川地震》
2022年第2期25-29,共5页
Earthquake Research in Sichuan
关键词
盐源县龙洞河
水位异常
异常变化
Yanyuan County
the Longdong River
abnormal water level
abnormal change
