摘要
滴灌技术是保证植物生长的有效手段,这种方式具有节水效果明显、不破坏土壤结构、降低费用及节省劳力等优点。为研究不同土壤的滴灌效果,采用基于Richards方程的有限元软件HYDRUS,对不同土层的公路边坡绿化滴灌进行了数值分析,分析结果表明无论是均质土层还是双层土层,在一定时间内浸润范围均随时间呈双曲型变化;在满足土壤被完全浸润的条件下,双层土层的滴灌点距可以设为均质土层点距1.4倍。
Drip irrigation technology is an effective means of guaranteeing the growth of plants,with various advantages such as prominent save in water and labor,maintenance of soil structures,decrease in operation cost.In this paper,in order to study drip irrigation effects in different soil types,numerical analyses were carried out on the drip irrigation effects for highway slope vegetation in different soil strata with a finite element software HYDRUS based on Richards' equation.Analytical results show that whether in a homogeneous stratum or a double-layered stratum,the immersion scope varied in a hyperbolic curve with the passage of time;in the condition of immersion,the interval between the drip irrigation spots in a double-layered stratum can be 1.4 times that in a homogeneous stratum.
