水土保持学报2017，Vol.31Issue(3)：330-336,343,8.DOI:10.13870/j.cnki.stbcxb.2017.03.054
地下滴灌影响要素及其敏感性分析
An Experimental Study on Influencing Factors Under Subsurface Drip Irrigation
摘要
Abstract
Subsurface drip irrigation (SDI),which has a wide application prospect,is one of the high-efficiency water-saving irrigation techniques.Because the emitters are buried in the soil,the hydraulic characteristics of SDI subunit pipe network are often affected by soil physical properties,and the research present on these problems are inadequate.In the paper,laboratory tests were carried out to investigate the influencing factors of hydraulic factors under subsurface drip irrigation,the treatments included work stress (60,100,150,200,250,300,370 kPa),soil initial moisture contents (12％,18％),and soil bulk densities (1.25,1.40 g/cm3).In addition,the sensitivity was also analyzed.In this study,PLASSIM emitters and Heping emitters were used.The main results were as follows:The work pressure was the main factor that affected the emitter discharge in all three soil samples,and the SDI emitter discharge was larger under higher work pressure.Soil bulk density and initial soil water content could limit the discharge,especially in sandy soil.Significant differences in the sensitivities of emitter discharges for different soil samples were obtained.The sensitivity was larger in the sandy soil,while it was smaller in the loamy soil and smallest in the clay soil.Three kinds of sensitive indicator of the PLASSIM emitter declined with the increase of work pressure,soil initial moisture content,and soil bulk density.The results obtained in this study could provide scientific instructions on irrigation program and efficient irrigation system.关键词
地下滴管/滴头流量/水力特性/影响因素/敏感性分析Key words
subsurface drip irrigation/emitter discharge/hydraulic characteristics/influencing factors/sensitivity analysis分类
农业科技引用本文复制引用
范王涛,李刚..地下滴灌影响要素及其敏感性分析[J].水土保持学报,2017,31(3):330-336,343,8.基金项目
国家自然科学基金项目(50549018) （50549018）
