Abstract: Emergent investigation of groundwater pollution is an important technical support for the emergent disposal of sudden environmental events. This paper analyzes the groundwater contamination pattern and the characteristics of the emergent investigation aspects which include the purpose of contamination tracing, the emergent disposal, data collection, rapid analyses, hydrogeological conditions, emergency monitoring, groundwater contamination tracing and safety matters, etc. The paper presents the use of geophysical testing equipment, portable fast testing equipment, appliable hydrogeological investigation and other field investigation methods. The emergent investigation of a groundwater contamination incident was introduced as an example and the emergent investigation principles and methods for the groundwater contamination applications are presented in the paper. 

Key words: groundwater contaminations, environmental emergencies, emergent investigation, water source protection, hydrogeology investigation, contamination tracing