{"title":"生物保水能保留多少水,水又去了哪里?","authors":"S. Spraakman, J. Martel, J. Drake","doi":"10.22541/au.163255049.94952987/v1","DOIUrl":null,"url":null,"abstract":"Bioretention is a type of green stormwater infrastructure for the urban\nenvironment that mimics a natural hydrologic system by reducing peak\nflows and runoff volumes and encouraging infiltration and\nevapotranspiration. This study examines the complete water balance of a\nbioretention system located in Vaughan, Ontario, Canada, between 2018\nand 2019. The water balance was further broken down by event size, where\nthe event size was determined by rainfall frequency analysis. Recharge\nwas the largest component of the water balance overall (86 % of\ninflow), as well as by event size. Evapotranspiration was the next\nlargest water balance component (7 % of inflow overall), and was a\nsignificant component of inflow (21 %) when considering only small\nevents (50 % probability of recurrence). Evapotranspiration is a slow\nbut consistent process, averaging 2.3 mm/day overall and 2.9 mm/day\nduring the growing season. Climate change is likely to bring more wet\ndays and higher temperatures, which will impact the bioretention water\nbalance by increasing evapotranspiration and inflow. Design standards\nfor retention targets should be updated based on the most recent\nrainfall frequency analyses to adjust for changing climate conditions.","PeriodicalId":9337,"journal":{"name":"Blue-Green Systems","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"How much water can bioretention retain, and where does it go?\",\"authors\":\"S. Spraakman, J. Martel, J. Drake\",\"doi\":\"10.22541/au.163255049.94952987/v1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Bioretention is a type of green stormwater infrastructure for the urban\\nenvironment that mimics a natural hydrologic system by reducing peak\\nflows and runoff volumes and encouraging infiltration and\\nevapotranspiration. This study examines the complete water balance of a\\nbioretention system located in Vaughan, Ontario, Canada, between 2018\\nand 2019. The water balance was further broken down by event size, where\\nthe event size was determined by rainfall frequency analysis. Recharge\\nwas the largest component of the water balance overall (86 % of\\ninflow), as well as by event size. Evapotranspiration was the next\\nlargest water balance component (7 % of inflow overall), and was a\\nsignificant component of inflow (21 %) when considering only small\\nevents (50 % probability of recurrence). Evapotranspiration is a slow\\nbut consistent process, averaging 2.3 mm/day overall and 2.9 mm/day\\nduring the growing season. Climate change is likely to bring more wet\\ndays and higher temperatures, which will impact the bioretention water\\nbalance by increasing evapotranspiration and inflow. Design standards\\nfor retention targets should be updated based on the most recent\\nrainfall frequency analyses to adjust for changing climate conditions.\",\"PeriodicalId\":9337,\"journal\":{\"name\":\"Blue-Green Systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2021-09-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Blue-Green Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22541/au.163255049.94952987/v1\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Blue-Green Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22541/au.163255049.94952987/v1","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
How much water can bioretention retain, and where does it go?
Bioretention is a type of green stormwater infrastructure for the urban
environment that mimics a natural hydrologic system by reducing peak
flows and runoff volumes and encouraging infiltration and
evapotranspiration. This study examines the complete water balance of a
bioretention system located in Vaughan, Ontario, Canada, between 2018
and 2019. The water balance was further broken down by event size, where
the event size was determined by rainfall frequency analysis. Recharge
was the largest component of the water balance overall (86 % of
inflow), as well as by event size. Evapotranspiration was the next
largest water balance component (7 % of inflow overall), and was a
significant component of inflow (21 %) when considering only small
events (50 % probability of recurrence). Evapotranspiration is a slow
but consistent process, averaging 2.3 mm/day overall and 2.9 mm/day
during the growing season. Climate change is likely to bring more wet
days and higher temperatures, which will impact the bioretention water
balance by increasing evapotranspiration and inflow. Design standards
for retention targets should be updated based on the most recent
rainfall frequency analyses to adjust for changing climate conditions.