涝渍排水控制指标的初步研究

A Study on the drainage index for combined control of surface and subsurface waterlogging

根据我国南方降雨和涝渍灾害的特点，提出必须将除涝和排渍统一进行考虑的观点，反映在排水工程的规划设计或排水系统建成后的水管理中，要把农田受淹和淹后受渍所造成的损失统一加以考虑．本文提出了两种排水控制指标与作物相对产量关系的形式．针对在安徽省水科院新马桥农田水利试验站的试验，建立了棉花相对产量与涝渍综合控制指标的关系．

Based on the analysis of the characteristics of rainfall and relevant surface and subsurface waterlogging, this paper presents the idea that a drainage project must accomplish combined control both of surface and subsurface waterlogging. From this idea, in planning a drainage project or in water management of a drainage system, the crop yield losses caused by both surface and subsurface waterlogging resulted from heavy rainfall should be taken into consideration. Two drainage indexes for the combined control of surface and subsurface waterlogging are proposed. Based on the experimental results, the relationship between relative yield of cotton and comprehensive index of waterlogging control are established.