{"id":3936,"date":"2021-11-01T17:26:49","date_gmt":"2021-11-01T14:26:49","guid":{"rendered":"https:\/\/www.orgbalt.eu\/?page_id=3936"},"modified":"2021-11-01T17:40:26","modified_gmt":"2021-11-01T14:40:26","slug":"peatland-simulator-susi-a-tool-for-estimating-water-table-levels-and-greenhouse-gas-emissions-in-organic-soils","status":"publish","type":"page","link":"https:\/\/www.orgbalt.eu\/?page_id=3936","title":{"rendered":"Peatland simulator SUSI \u2013 a tool for estimating water table levels and greenhouse gas emissions in organic soils"},"content":{"rendered":"\n<p>LIFE OrgBalt contributes to improving the national greenhouse gas (GHG) inventories in the project regions by both establishing demonstration sites where GHG emissions are measured and using tools for estimating GHG emissions where actual measurements are not available. The Peatland simulator SUSI created by the Natural Resource Institute Finland (Luke) uses a hydrological model which requires inputs of weather and stand data to estimate water table levels and create projections of GHG emission levels in organic soils. In this technical article, the key principles of the simulator are explained. <\/p>\n\n\n\n<p><a href=\"https:\/\/www.orgbalt.eu\/wp-content\/uploads\/2021\/11\/LIFE-OrgBalt-article-Peatland-Simulator-SUSI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"FULL ARTICLE AVAILABLE: HERE. (opens in a new tab)\">FULL ARTICLE AVAILABLE: HERE.<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Peatland soils and drainage<\/h4>\n\n\n\n<p>The\npeatland simulator SUSI is a software package for modelling the forested\npeatland ecosystem hydrology, stand growth and nutrient availability under\ndifferent management, site types and weather conditions. Given input weather\nand stand data, SUSI calculates various quantities of interest for making\nprojections and comparing management options. The core of SUSI is a strip\nhydrology model, which simulates the water table level on a linear strip perpendicular\nto two bordering ditches. Hydrology, along with other components of the\nsoftware, are in turn used to estimate, for example, greenhouse gas emissions,\nnutrient flows, and stand growth.<\/p>\n\n\n\n<p>Most\nimportantly, projections of greenhouse gas emissions can be made based on\nknowledge of the water table and other quantities in the model. The value of\nthe model is in producing these estimates for sites for which actual greenhouse\ngas measurements are not available. Modelling only requires weather and stand\ndata, which are readily available.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Description of the Model<\/h4>\n\n\n\n<p>The\nSUSI model was recently published in <em>Forests<\/em> (doi: 10.3390\/f12030293).\nThe publication describes the structure and equations of the model, as well as\nvalidates the model against a wide variety of data from Finland. <\/p>\n\n\n\n<p>A\nPython implementation of the model is publicly available at https:\/\/github.com\/annamarilauren\/susi,\nmaking the simulator accessible by anyone. The required inputs to the model are\na few site-specific parameters, daily weather data, and stand growth curves\nwith biomass partitioning. <\/p>\n\n\n\n<p>The\nkey component of the model is soil hydrology simulation on a strip reaching\nfrom one ditch to another. Effective water inputs to the soil profile are\ncalculated from the input rainfall values, interception by the tree stand and\nground vegetation, and surface runoff and evapotranspiration. The soil water\nprofile then approaches an equilibrium with the bordering outputs, which are\nthe ditches on both sides of the strip. <\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Utilisation in the LIFE OrgBalt\nproject<\/h4>\n\n\n\n<p>Within\nthe LIFE OrgBalt project, the published model has been expanded to estimate\nmethane and dinitrogen oxide emissions, in addition to the carbon dioxide\nreleases in the original description. Additionally, improvements have been made\nto the simulator interface, making it more accessible to the research community.\nIt is planned that the model will be utilised to produce large scale emission\nprojections from organic soils for the involved countries to improve the\ngreenhouse gas inventory in each country. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>LIFE OrgBalt contributes to improving the national greenhouse gas (GHG) inventories in the project regions by both establishing demonstration sites where GHG emissions are measured and using tools for estimating [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":3649,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3936","page","type-page","status-publish","hentry"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/pages\/3936","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3936"}],"version-history":[{"count":2,"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/pages\/3936\/revisions"}],"predecessor-version":[{"id":3945,"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/pages\/3936\/revisions\/3945"}],"up":[{"embeddable":true,"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=\/wp\/v2\/pages\/3649"}],"wp:attachment":[{"href":"https:\/\/www.orgbalt.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}