Aquifers formed in the wetland area around the closed lacustrine chalk mine at Mierzyno (northern Poland) are distinguished by a specific groundwater flow system, the main component of which is lateral flow and ascent seepage from the deep aquifer to the ground surface. In investigating the origin of the uncontrolled groundwater outflows and the phenomenon of progressing spring pools, field and laboratory work, as well as model studies of groundwater flow, allowed assessment of damage to the soil and aqueous environment. These occurred due to defective reclamation of post-mining areas, as a result of which the natural hydrodynamic balance in the groundwater was disturbed. Artesian pressure in the deep aquifer caused layer interruption at the boundary of the lacustrine chalk deposit. In consequence, strong uncontrolled outflow of groundwater occurred, and the accompanying spring pools are changing their position as a result of headward erosion. So far, the amount of washed-out carbonate sediment exceeds 5,600 m³.

在 Mierzyno（波兰北部）封闭的湖泊白垩矿周围的湿地区域形成的含水层以特定的地下水流系统为特征，其主要成分是侧向流和从深层含水层到地表的上升渗流。在调查不受控制的地下水流出的起源和不断涌现的泉池现象时，现场和实验室工作，以及地下水流的模型研究，允许评估对土壤和水环境的损害。这些是由于采后区域的缺陷复垦造成的，结果破坏了地下水中的自然水动力平衡。深层含水层的自流压力导致湖相白垩沉积物边界层中断。结果，地下水发生了不受控制的强烈流出，伴随的泉水池由于水头侵蚀而改变了它们的位置。迄今为止，冲刷碳酸盐沉积物量超过5,600 m³ .