摘要
平原河网地区受其土质以及降雨特点的影响,干旱与涝渍灾害交替出现,以前单一的排水系统设计标准难以满足排涝抗旱的目标。本文利用DRAINMOD模型,模拟分析不同排水系统设计方案对提高作物产量的影响。结果显示,在考虑作物产量最大化的目标下,研究区农田排水系统布置宜采用排水暗管浅密的布置方案,且排水暗管布置间距12~15m之间,埋深以不超过1.2m为宜。本研究成果可为当地排水系统改造和设计提供科学理论依据。
Owing to the soil texture and characteristic rainfall,drought and water logging hazards appear alternately in the plain river network region.The existing drainage system was designed for single objective of water logging control,which neglected equal needs of drought prevention.With the aid of the model-DRAINMOD,this paper presents a simulation study of effect of different drainage system design on optimization of crop yields.The results show that the optimized subsurface drainage system layout for the study area is placing the drain pipes at depths no deeper than 1.2 mand spacing between 12 to 15 mconsidering increasing production.The results of this study can provide scientific theoretical basis for the reconstruction and design of local drainage system.
