Semivolatile　organic　compounds　(SVOCs)　in　surface　microlayer　(SML)　and　subsurface　water　(SSW)　from　Dianshan　Lake　were　studied　to　investigate　their　occurrence,　distributions,　as　well　as　enrichment　and　potential　sources.　A　sample　was　concentrated　by　solid-phase　micro-extraction　(SPME).　Identification　and　quantification　were　carried　out　by　gas　chromatography　coupled　to　mass　spectrometry　(GCMS).　Total　SVOCs　concentrations　ranged　from　25.93　to　47.49　mu　g/L　in　SSW　and　38.19　to　77.23　mu　g/L　in　SML.　The　phthalic　acid　esters　(PAE)　concentrations　in　both　SSW　and　SML　are　the　highest　of　the　total　SVOC.　The　enrichment　factors　(EFs)　of　total　SVOCs　ranged　from　0.80　to　2.98,　while　the　highest　EF　was　found　in　benzyl　phthalate　and　dibutyl　phthalate,　compounds　of　PAEs　(4.06).　The　EFs　values　calculated　in　this　study　were　consistent　with　the　EFs　reported　for　other　water　ecosystems.　Compared　with　other　place,　the　EF　of　PAHs　were　in　the　normal　level　(0.88-2.37).　The　results　of　correlation　analysis,　principal　component　analysis　(PCA)　suggested　that　at　least　three　sources,　i.e.,　agricultural　residual　pesticides,　industrial　sewage　and　miscellaneous　sources,　were　responsible　for　the　presence　of　SVOCs　in　Dianshan　Lake　examined,　accounting　for　94.16%　of　the　total　variance　in　the　dataset.　Environmental　risk　assessment　revealed　that　a　majority　of　SVOCs　posed　relatively　low　risks　(the　values　of　risk　quotientwere　less　than　0.1),　while　naphthalene,　acenaphthene,　2,4-dinitrotoluene,　and　dibutyl　phthalat　exhibited　moderate　risks　(values　of　risk　quotient　were　more　than　0.1　but　less　than　1fore)　to　aquatic　organisms.