会泽县冷浸田排水控制指标探讨

Study on Drainage Index of Cold Water Paddy Field in Huize County

冷浸田是云南省会泽县涝渍型灾害中的一个主要类型,建立会泽县冷浸田排涝渍控制指标,对建设高产稳产田具有指导作用。以涝渍水深为综合指标模型,利用规范或规程规定及经验数据确定相应指标,采用地下水渗流计算进行浸润曲线复核排水沟底深。建立了会泽县冷浸田排涝渍指标：排渍深度1.2~1.8 m,耐渍深度0.5~0.8 m,耐渍时间3 d,稻田适宜渗漏量为8 mm/d,地下水临界深度0.8~1.4 m。通过工程实践与运行效果观测,排水效果明显,加强了土壤通气性,土壤排水通气顺畅。从工程设计角度采用浸润曲线复核基本尺寸的适用性。

Cold water paddy field is a main type of waterlogged land disasters in Huize County,Yunnan province.The establishment of flood and waterlogging drainage index was to provide guiding role to develop high and stable yield fields.It was based on comprehensive index,making use of normal or regular provision and empirical data to assurance corresponding index,adoption infiltration and check the depth of drainage ditches.Control gates should be built to control the underground water level,considering both irrigation and drainage.The flood and water logging drainage index in Huize county are discussed,based on living example and reforming practice of cold water paddy field.