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我省中南部平原地区,地形低平,坡降很缓,大、中、小洼淀星罗棋布,缓岗及自然堤多与洼淀交错排列,中、小地形极为复杂.由于我省降雨集中,地表径流受地形阻隔,排泄不畅,形成沥涝.因涝抬高了地下水位,在春季干旱、蒸发强烈的条件下,地下水及底土所含盐分随水向表层移动集中,促进了土壤盐碱化的发展.洼涝盐碱地区是我省历史上的多灾低产区.因此,排除沥涝,降低水位,是改良盐碱、实现稳产增收的根本措施.
In central and southern plains of our province, the terrain is low and the gradient is gentle. The large, medium and small lakes are dotted with staggered posts, the slow valleys and natural dikes are staggered with the depressions of the lakes, and the medium and small terrain is extremely complicated. Due to the concentrated rainfall in our province, Surface runoff is blocked by the terrain, poor drainage, the formation of leaching waterlogging due to waterlogging elevated groundwater level, in the spring drought, strong evaporation conditions, groundwater and subsoil salinity with water to move to the surface to focus on the promotion of soil salinity The development of the saline-alkali region is a disaster-prone and low-yielding area in the history of our province, therefore, removing the flood and waterlogging and lowering the water level is the fundamental measure to improve the saline-alkali soil and achieve a steady income.