This　paper　compares　the　field　performance　of　non-vegetated　and　vegetated　three-layer　landfill　cover　systems　utilising　construction　waste　but　without　geomembrane　at　the　Shenzhen　Xiaping　landfill　site　in　humid　climates　over　a　monitoring　period　of　54　months.　The　top　layer　of　each　cover　system　was　constructed　using　coarse-grained　completely　decomposed　granite　(CDG).　The　middle　and　bottom　layers　were　compacted　with　coarse　recycled　concrete　(CRC)　and　fine-grained　CDG,　respectively.　Numerical　analyses　were　also　carried　out.　During　the　54-month　monitoring　period,　the　cumulative　rainfall　recorded　was　9800　mm.　Retained　pore　water　pressure　in　the　vegetated　cover　was　close　to　that　in　the　non-vegetated　cover　after　the　heaviest　rainfall　recorded　in　Shenzhen　during　the　monitoring　period.　The　pore　water　pressure　retained　in　the　vegetated　cover　can　be　higher　than　that　in　the　non-vegetated　cover　due　to　the　increased　saturated　water　permeability　(k(s))　induced　by　plant　growth　over　3　years.　Surface　runoff　and　water　storage　capacity　in　the　vegetated　cover　were　about　five　times　and　9%　higher　than　those　in　the　non-vegetated　cover,　respectively.　However,　the　long-term　behaviour　of　the　cover　system　in　respect　of　these　two　aspects　was　influenced　by　the　increase　of　k(s)　due　to　the　growth　of　grass　roots.　The　middle　CRC　layer　diverted　infiltrated　water　by　up　to　51%　of　total　rainfall.　The　measured　average　annual　percolation　of　the　non-vegetated　and　vegetated　covers　was　about　23　mm　and　21　mm,　respectively.　The　measured　data　are　supported　by　numerical　analyses　and　they　meet　the　US　recommended　criterion.