






摘要通過模擬屋面與立面綠化滲濾系統,研究不同屋面綠化基質和立面綠化基質對雨水徑流的凈化效果。結果表明:屋面綠化基質以玻璃輕石+陶粒+河沙處理的污染物去除率最大,對總氮(TN)、氨氮、總磷(TP)、化學需氧量(COD)的去除率分別為41.31%、55.07%、43.65%和36.36%;以玻璃輕石+陶粒為屋面綠化基質對污染物的凈化效果不佳;玻璃輕石+陶粒+泥炭土、泥炭土對總磷的去除率均大于90%,但其對氮的去除效率不高;立面綠化基質中,生物炭、土非土的凈化效果較好,生物炭對氨氮、總磷的去除率分別為98.45%和92.93%,巖棉、巖棉+玻璃輕石、炭棉對氮、磷的去除效果均較差。其中,巖棉處理的總氮、氨氮去除率分別為-20.42%和5.06%,而巖棉+玻璃輕石處理的總氮、總磷去除率均為負值。
關鍵詞屋面綠化;立面綠化;基質;雨水徑流;凈化能力
中圖分類號X171"文獻標識碼A"文章編號0517-6611(2024)24-0184-04
doi:10.3969/j.issn.0517-6611.2024.24.039
開放科學(資源服務)標識碼(OSID):
StudyonthePurificationEffectofDifferentRoofandFacadeGreeningSubstratesonRainwaterRunoff
SUChun-qing,ZHENGWei-guo,LUYangetal
(GuangdongWenkeGreenTechnologyCo.,Ltd.,Shenzhen,Guangdong"518111)
AbstractRoofandfacadegreeninginfiltrationsystemweresimulatedtostudythepurificationeffectofdifferentroofgreeningsubstratesandfacadegreeningsubstratesonrainwaterrunoff.Theresultsshowedthatthepollutantremovalrateofglasslightstone+ceramsite+riversandwasthehighest,andtheremovalratesoftotalnitrogen(TN),ammonianitrogen,totalphosphorus(TP)andchemicaloxygendemand(COD)were41.31%,55.07%,43.65%and36.36%,respectively.Thepurificationeffectofglasslightstone+ceramsiteasroofgreeningsubstratewasnotgood.TheremovalrateofTPbyglasslightstone+ceramsite+peatsoilandpeatsoilwasmorethan90%,buttheremovalefficiencyofnitrogenwasnothigh.Thepurificationeffectofbiocharandnon-soilwasbetterinthefacadegreeningsubstrate.TheremovalratesofammonianitrogenandTPbybiocharwere98.45%and92.93%,respectively.Theremovaleffectsofnitrogenandphosphorusbyrockwool,rockwool+glasslightstoneandcarbonwoolwereworse.TheremovalratesofTNandammonianitrogenbyrockwooltreatmentwere-20.42%and5.06%,respectively.While,theremovalratesofTNandTPbyrockwool+glasslightstonewerenegative.
KeywordsRoofgreening;Facadegreening;Substrate;Rainwaterrunoff;Purificationcapacity
雨水對大氣、地面以及土壤中的污染物進行淋溶和沖刷后形成的徑流中含有懸浮物(SS)、化學需氧量(COD)、總氮(TN)、總磷(TP)等污染物,容易造成水體黑臭或富營養化[1]。基于低影響開發(low impact development,LID)理念的“海綿”技術可通過加強城市規劃建設管理,充分發揮建筑、道路、綠地、水系等生態系統對雨水的吸納、蓄滲和緩釋作用,有效控制雨水徑流,達到雨水截污凈化的目的。目前比較成熟的LID措施主要包括綠色屋頂、滲透鋪裝、植草溝、下凹綠地、人工濕地和雨水花園等[2]。
LID技術主要通過植物和基質的滲濾截留及吸附作用來控制雨水徑流污染。其中,基質是植物生長的基石及微生物附著的主要場所,是海綿設施的主體部分和重要影響因素[3]。……