Nearly 100 Quick Clay Zones in Romerike are investigated by NVE to assess risk

The Norwegian Department of Water Resources and Energy (NVE) has investigated Romerike and identified 98 Quick Clay Zones that will be thoroughly investigated from this fall.

In the fall of 2021, NVE conducted a survey to confirm the condition along rivers, streams, and canyons of selected Quick Clay Zones in Ullensaker, Gjerdrum, and Nannestad municipalities.

The 98 Quick Clay Zones selected are based on basic and terrain data collection, erosion inspection, and initial ground surveys. Of the total, 22 zones are in Gjerdrum, 40 are in Nannestad, and the remaining 36 are in Ullensaker.

“If these quick clay zones are eroded and the ground conditions are bad, there is a risk of landslides. We want to find and create the basis for safety measures as needed,” said the project manager. Ingrid Havenen Speaking in NVE Norway today on mail.

Work is Quick clay landslide At Gjerdrum on December 30, 2020. Most of Øvre Romerike has Quick Clay.

Risk status of Quick Clay Zone

“Hazards are an expression of the potential for landslides and are assessed by topographical, geoengineering, hydrological conditions, and changes due to human activity, climatic effects, erosion, and so on.

“Results are based on population, place of residence, infrastructure, and other factors. Risk is a product of danger and consequences. Each of these factors is scored, depending on the importance of causing a landslide. Or it is weighted according to the impact of landslides on danger, “Havnen explained.

She said that danger can be divided into three classes. “High hazard”, “Medium hazard”, “Low hazard”. Hazard effects are also categorized into three classes: “not severe,” “severe,” and “very severe,” and risk is categorized into five classes.

According to Havnen, the report is likely to be completed by the end of 2023.

Robin-Ivan Capar is a contributor and editor of Norway Today.

Source: #Norway Today / #NorwayTodayNews

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