坡度与滴头间距对砂壤土地下滴灌水分运移影响研究

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中图分类号：S157.2 文献标识码：A 文章编号：2095-5553（2025）08-0246-1

Abstract：Toinvestigate theefectsof slopeandemiter spacingonthemovementof soil water insubsurface drip irrigationof sandy loam，a two-dimensional soil water movement model was constructed，which was solved using the HYDRUS—2Dsoftwareandvalidatedwith soil boxexperiments.Thestudyanalyzedthedynamicchangesof infiltration Wetingfronts，thedistributionof watercontentintheweted body，andthevariationinirigationuniformityunderthree slope conditions （ 15∘ ， 30∘ ， 45∘ ），three emitter spacings （0.2m， 0.25m， 0.3m） ，and three initial water content levels （0.183cm3/cm3 ， 0.218cm3/cm3 ， 0.363cm3/cm3 ）．Results indicated that：Under slope influence，the wetting front tends to move downhill；Increasing emiter spacing reduces therate of wetting front movement，with an optimal spacing of 0.25m ； Higher initial water content leads to more iregular weting front shapes；Soil water content slightly decreases along theslopedirection，whileremaining relativelystableinthevertical direction，making pressure-compensatingemiters suitable for slopedsubsurface drip irigation systems； Irrigationuniformity exceeds O.9.Varianceanalysis showed that initial water content has the most significant impact on soil water content.

Keywords：sloeecologicalrestoration；subsurfacedrip irigation；slope；emiter spacing；watertransportcharacteristics; sandy loam soil

0 引言

随着我国经济快速发展，众多水利、道桥工程等基础设施兴建，并伴随大量边坡开挖，尤其对于高陡边坡，如果不及时治理会引起生态环境破坏，甚至导致地质灾害发生。（剩余18337字）