Maryland Ecosystem Services - Surface Water Protection Economic Value - dollars per year

This layer quantifies the yearly economic value of surface water protection provided by forests and wetlands across Maryland. About half of the water supply in Maryland is sourced from reservoirs. Natural lands are exceptionally important in maintaining water quality in reservoirs, reducing the cost to treat the water to water supply standards. This analysis is focused on the five major reservoirs in Maryland, Loch Raven, Liberty, Pretty Boy, Tridelphia, and Rocky Gorge are the major water sources for residents of the densely populated Baltimore-Washington corridor. The forests and wetlands within the watersheds of these reservoirs are of unique economic value, as help to provide clean water, reducing the cost of treatment, and avoiding the cost of expensive water treatment plant upgrades to maintain quality standards. Economic values are based on a number of factors, including the average cost savings of water treatment from having trees in the watershed, the municipal price of water, and the cost avoided of having to upgrade a treatment plant to advanced treatment. The average price was found to be $1.52 per m3 of water. Almost all of this service is concentrated in four counties- Baltimore, Carrol, Howard, and Montgomery, totaling $245 of the $246 million of value yearly. This data layer was created as part of the Maryland Department of Natural Resources "Accounting for Maryland's Ecosystem Services" program. This is a MD iMAP hosted service. Find more information on https://imap.maryland.gov. Map Service Link: https://mdgeodata.md.gov/imap/rest/services/Environment/MD_EcosystemServices/MapServer/22 Download the Ecosystem Services layers at: https://downloads.mdgeodata.md.gov/Environment%20Downloads/Ecosystem%20Services/EcosystemServices.gdb.zip本图层量化了马里兰州全域森林与湿地所提供的地表水保护服务的年度经济价值。马里兰州约半数的供水源自水库。自然用地对维持水库水质至关重要，可降低将水处理至供水标准所需的成本。本次分析聚焦于马里兰州五大核心水库：洛赫雷文（Loch Raven）、利伯蒂（Liberty）、普雷蒂博伊（Pretty Boy）、特里尔菲亚（Tridelphia）以及洛基峡谷（Rocky Gorge），它们是人口稠密的巴尔的摩-华盛顿走廊地区居民的主要供水来源。上述水库流域内的森林与湿地具备独特的经济价值，可助力提供洁净水源，降低水处理成本，同时避免为维持水质标准而升级昂贵水处理厂的支出。经济价值核算基于多项因素，包括流域内林木带来的平均水处理成本节约额、市政供水价格，以及因无需将水处理厂升级至高级处理工艺而节省的成本。经测算，供水平均价格为每立方米1.52美元。该生态服务的年度经济价值几乎全部集中于巴尔的摩、卡罗尔、霍华德与蒙哥马利四县，在全年2.46亿美元的总价值中占比达2.45亿美元。本数据图层是马里兰州自然资源部"Accounting for Maryland's Ecosystem Services"项目的成果之一，属于MD iMAP托管服务。更多信息可访问https://imap.maryland.gov。地图服务链接：https://mdgeodata.md.gov/imap/rest/services/Environment/MD_EcosystemServices/MapServer/22。可通过以下链接下载生态系统服务图层：https://downloads.mdgeodata.md.gov/Environment%20Downloads/Ecosystem%20Services/EcosystemServices.gdb.zip