The Norwegian National Database for Ground Investigations (NADAG): A Tool to Assist in Landslide Hazard Zonation and Other Quick-Clay Related Issues

Abstract

Exploitation of the subsurface is becoming more frequent and the demand for knowledge about ground conditions is increasing. A vast amount of data from ground investigations such as geotechnical drilling, bedrock drilling and ground water wells exists in Norway. However, many of these are not easy to access as they are spread between multiple data owners and users. Following the development of The National Database for Ground investigations (NADAG) during the last years, the registration of geotechnical data has started. With increased accessibility of data, re-use will lead to considerable savings for the society. Importantly, the information will allow for better landslide hazard zonation. In addition, the effectiveness of emergency planning and response will improve with access to relevant, accurate and timely information about the local ground conditions. This may be crucial after landslide events with regard to the assessment of potential landslide expansion and the safe evacuation of people. NADAG aims to collect and make publically available data from ground investigation important for the society. The database contains various amounts of data, depending on availability – ranging from metadata (location, drill type, drill depth, company, date, report no., etc.) to full reports and raw data. NADAG will initially be populated by data from geotechnical investigations. A primary objective for NADAG is to distribute data from all types of ground investigations in Norway and to present the data coverage through a map-enabled web application.