On the issue of uneven groundwater levels based on Arkhangelsk region in the context of the dewatering installations used for extinguishing forest fires

The ground gravity waters located between the surface layer and the layer of waterproof rock (infiltration origin) are characterized by the ability to move with filling of the available possible voids in the soil. The laying of hydrogeological gates to study the slope of the level of occurrence of soil-groundwater gravity waters to the place of discharge (streams, rivers, lakes, lowland swamps) in forest areas exposed to fire danger does not always reliably assess the uniformity (or unevenness) of their occurrence. To conduct a full-scale experiment confirming the hypothesis of uneven occurrence of the groundwater level in relation to the unloading site (using the example of the Arkhangelsk region), an option based on the principle of creating the plane under study by drilling wells in two perpendicular directions at regular intervals was chosen. The distance between the wells was chosen based on the accepted observation area and the required accuracy of the result obtained. The study was conducted from June 1, 2022 to August 28, 2022. The results prove the uneven occurrence of the level (the minimum observed extreme is 21 cm, the maximum is 100 cm, the average value of level fluctuations is 27.8 cm) of groundwater in relation to the unloading site using the example of the Arkhangelsk region. In the future, the results may be used to position of dewatering installations when extinguishing forest fires.