Flood-producing areas

Flood-producing areas are areas, in particular in the low mountain and hilly landscapes, in which heavy precipitation or snowmelt can cause strong above-ground runoff in a short time, which can lead to a flood risk in the flowing waters and thus to a significant threat to public safety and order (Section 76(1) sentence 1 SächsWG). The designation of flood-producing areas as a statutory instrument is a measure for flood prevention of the Free State of Saxony. The restrictions in the ordinance area are intended to prevent flood damage or to minimise it as far as possible. The aim is to prevent the risk of flooding from being further increased by construction or other measures that promote runoff and impede infiltration. The water infiltration and retention capacity of the areas in which the increased probability of heavy precipitation coincides with terrain morphology, e.g. characterised by steep gradients, which promotes rapid runoff, is of considerable importance for the occurrence or extent of flood events. The Upper Water Authority (Landesdirektion Sachsen) determines the flood areas by statutory instrument.产洪区（Flood-producing areas）特指低山与丘陵地貌区域，此类区域在短时间内遭遇强降水或融雪时，会产生强烈的地表径流，进而导致河道洪水风险，对公共安全与社会秩序构成严重威胁（《萨克森州水法》（SächsWG）第76条第1款第1句）。将产洪区划定为法定管制区域，是萨克森自由州实施洪水预防的一项法定措施。该管制条例覆盖范围内的各项限制措施，旨在杜绝洪水灾害或尽可能降低灾害损失。其核心目标为，防范因工程建设或其他促进径流、阻碍水分下渗的人为活动，进一步加剧洪水风险。在强降水发生概率提升，且地形地貌（如以陡坡为典型特征）会促进径流快速形成的区域，其土壤水分下渗与滞蓄能力，对洪水事件的发生与否及灾害波及范围具有至关重要的影响。萨克森州上级水利管理局（Landesdirektion Sachsen）通过法定程序划定产洪区。