{"id":355,"date":"2024-06-05T17:12:36","date_gmt":"2024-06-05T15:12:36","guid":{"rendered":"https:\/\/coolbluefuture.org\/?page_id=355"},"modified":"2025-11-13T11:13:31","modified_gmt":"2025-11-13T10:13:31","slug":"lesson-3","status":"publish","type":"page","link":"https:\/\/coolbluefuture.org\/da\/guide-to-regenerative-ocean-farming\/lesson-3\/","title":{"rendered":"Lektion 3"},"content":{"rendered":"Lektion 3\n\t\t\t\t\t\n

\n\t\t\tLektion 3: Ops\u00e6tning af en havmark\t<\/h1>\n\t\n\t\t\t\t\t\tThe lesson is currently available in English, Danish & Lithuanian\n\t\t\t\t\t<\/a>\n

\n\t\t\tIntroduktion\t<\/h3>\n\t

Det gode ved at dyrke i havet er, at designet af en havmark er modul\u00e6rt, skalerbart og nemt kan tilpasses, s\u00e5 det passer til din lokalitet. Selv om de fleste havmarker har de samme grundelementer til f\u00e6lles, vil alle havmarker v\u00e6re forskellige, fordi alle placeringer og alle havb\u00f8nder er noget helt for sig selv.<\/p>\n\t\t\t\t\"cool-blue-future-ocean-underwater-01\"\n\t

Designet af din havmark vil blive p\u00e5virket af:<\/p>\n

\n\t\t\tFysiske begr\u00e6nsninger\t<\/h4>\n\t

Husk alle de milj\u00f8faktorer, vi diskuterede i lektionen om at finde det rigtige sted: Str\u00f8mhastighed, vind- og b\u00f8lgeeksponering, bundtype, bunddybde osv. Disse faktorer vil p\u00e5virke den type udstyr, der kr\u00e6ves, og det endelige design af din havmark.<\/p>\n

\n\t\t\tDin forretningsstrategi\t<\/h4>\n\t

Hvad har du t\u00e6nkt dig at g\u00f8re med dine afgr\u00f8der, n\u00e5r de kommer op af vandet? Hvor meget skal du producere for at n\u00e5 dine forretningsm\u00e5l?<\/p>\n

\n\t\t\tDit opstartsbudget\t<\/h4>\n\t

V\u00e6r \u00e6rlig over for dig selv om begr\u00e6nsningerne i dit budget og den type system, du realistisk set har r\u00e5d til at bygge.<\/p>\n

\n\t\t\tSociale forhold\t<\/h4>\n\t

Do you need to make compromises to accommodate members of your community, such as limiting surface buoys to minimize visual disruption or choosing gear that’s easy to remove in the summer months when recreational boating is high?<\/p>\n\t

S\u00f8rg for at have disse vejledende principper i tankerne, n\u00e5r du gennemg\u00e5r designprocessen for din havmark; de b\u00f8r indg\u00e5 i alle de valg, du tr\u00e6ffer.<\/p>\n

The farm design process is likely to be iterative. You might need to adjust your design throughout the start-up process based on feedback from your national permitting agency, availability of gear in your area, input from farmers in your area, etc. But in general, to start a farm, you’ll need to:<\/p>\n

    \n
  1. V\u00e6lge den eller de dyrknings-rigge, du vil anvende.<\/li>\n
  2. Determine how many arrays you’ll need to meet your production goals.<\/li>\n
  3. Determine how large a site you’ll need to house your farm.<\/li>\n
  4. V\u00e6lge det udstyr, der passer til din lokation.<\/li>\n
  5. Udarbejde og indsende en ans\u00f8gning til myndighederne i dit land.<\/li>\n<\/ol>\n

    When you’re first getting into ocean farming, there is a lot to figure out. Beyond the journey of finding and permitting your site, designing a farm, organizing seed, and identifying a market for your crop, there are two key questions to consider:<\/p>\n

    \n\t\t\tKan du lide denne type arbejde?\t<\/h4>\n

    \n\t\t\tVokser afgr\u00f8derne godt p\u00e5 det sted, du har valgt?\t<\/h4>\n\t

    Som med s\u00e5 mange andre ting i livet kan du g\u00f8re dit bedste for at planl\u00e6gge og forudsige, men den bedste m\u00e5de at besvare disse sp\u00f8rgsm\u00e5l p\u00e5 er ved at leve det.<\/p>\n

    We recommend that you approach your first year of farming as a trial period. Think about your first season as a test run where you go through all the stages, steps, and processes of outplanting, growing, and harvesting on your chosen site, but you minimize your up-front capital expenditure to the best of your ability. You’ll learn as much your first year farming from growing two lines as you will twenty. And by minimizing your overhead, you’ll reduce the risk of losing a lot of money. In essence, you want to design and permit a farm, but plant a garden.<\/p>\n

    In an ideal world, every country would have a permitting process in place to allow farmers to easily lease and permit a test site to conduct these tests. In some countries, you can receive an experimental permit; a small inexpensive lease, which allow farmers to try out the industry. But unfortunately, many other countries don’t have this option, and the permitting process can be long and drawn out. In short, you don’t want to do it twice in two years. So, although you may not be growing at a full commercial scale until year two or even year three, it’s in your best interest to permit your farm for the full acreage required to operate your farm at scale, based on your calculations. Reach out to your Cool Blue Future nationale facilitator<\/a> , hvis du har brug for hj\u00e6lp til at finde ud af, hvordan reglerne er i dit land.<\/p>\n

    As you go through the rest of this course, design and plan a farm that will help you meet your business goals, but keep in mind that you don’t need to install all the gear immediately. You could permit a 3-hectare site but only install two arrays your first year. Even though you don’t plan on running your full farm in year one, you should be roughly aware of how your farm will look and how much money you stand to earn when your farm is running at scale. So, it’s a good exercise to design your fully operational farm to the best of your ability.<\/p>\n

    Tang og muslinger bruger begge den samme grundl\u00e6ggende infrastruktur til at vokse. Men det sprederb\u00f8jle-design, der beskrives senere i denne lektion, er ikke egnet til dyrkning af muslinger og \u00f8sters, da kraften af det lodrette tr\u00e6k fra afgr\u00f8derne er mere end strukturen kan klare. S\u00e5 hvis du dyrker muslinger eller \u00f8sters, m\u00e5 du n\u00f8jes med at bruge enkeltliner.<\/p>\n

    \n\t\t\tEnkeltline-system\t<\/h3>\n\t

    The simplest, most straightforward way to grow kelp or mussels is with a single-line array. It’s the classic, original design that farmers have been using for decades. A single, horizontal growline is submerged about one meter below the surface and attached to anchors on either end. The single-line array is the design we recommend for all first-year farmers.<\/p>\n

    I diagrammerne nedenfor kan du se b\u00e5de et luftfoto og et profilfoto af denne opstilling. L\u00e6g m\u00e6rke til de tre hovedkomponenter i systemet: B\u00e6relinen, b\u00f8jerne og ankrene.<\/p>\n\t\t\t\t\"Growline\n\t\tEn b\u00e6reline set fra siden, illustration fra GreenWave\n\t\t\t\t\"Growline\n\t\tEn b\u00e6reline set fra oven, illustration fra GreenWave\n

    \n\t\t\tB\u00e6reline\t<\/h4>\n\t

    Den line, der h\u00e6nger vandret i vandet, hvor tangen sidder fast, n\u00e5r den vokser. Under udplantningen er b\u00e6relinen omviklet med en podet tangline, der indeholder tusindvis af helt sm\u00e5 tangplanter, der vokser sammen med b\u00e6relinen og bliver til store tangblade hen over v\u00e6ksts\u00e6sonen.<\/p>\n

    N\u00e5r du dyrker muslinger, h\u00e6nger muslingerne i str\u00f8mper eller fortl\u00f8bende b\u00e5nd i guirlander ned fra b\u00e6relinen og er f\u00e6stnet med faste mellemrum. \u00d8stersbure eller -net h\u00e6nges ogs\u00e5 direkte p\u00e5 b\u00e6relinen ned gennem vands\u00f8jlen.<\/p>\n\t\t\t\t\"Growline,\n\t\tB\u00e6reline, illustration fra GreenWave\n

    \n\t\t\tB\u00f8jer\t<\/h4>\n\t

    B\u00f8jerne i en havmark holder systemet flydende og markerer vigtige elementer i anl\u00e6gget, som er skjult under vandet.<\/p>\n

    B\u00f8jerne, der holder afgr\u00f8derne flydende, kaldes b\u00e6reline-b\u00f8jer. Efterh\u00e5nden som dine afgr\u00f8der vokser, bliver de tungere og tungere, og til sidst tynger de b\u00e6relinen s\u00e5 meget, at den kan synke til bunds uden nogen form for opdrift. B\u00e6reline-b\u00f8jerne modvirker denne kraft ved at holde afgr\u00f8derne p\u00e5 den rette dybde for ideelle v\u00e6kstbetingelser, typisk omkring 1-2 meter under vandoverfladen. B\u00e6reline-b\u00f8jerne giver ogs\u00e5 adgang til afgr\u00f8derne, s\u00e5 du kan l\u00f8fte b\u00f8jerne op til overfladen og inspicere afgr\u00f8derne uden at forstyrre deres v\u00e6kst. Diagrammet viser en normal 60 meter lang b\u00e6reline med tre b\u00e6reline-b\u00f8jer, der er fastgjort med 15 meters mellemrum.<\/p>\n

    You might find you are able to maintain enough buoyancy with fewer buoys, especially early in the season when the crops aren’t adding substantial weight to the growline. Too much buoyancy early on can cause the growlines to surface during bad weather and cause damage to your crop. After outplanting, we mark the buoy connection points with a small cork that can easily be swapped out for a buoy later in the season.<\/p>\n

    Ankerlinjeb\u00f8jer markerer forbindelsespunktet mellem b\u00e6relinen og ankerlinen p\u00e5 hver side af opstillingen. Typisk er ankerlinjeb\u00f8jerne st\u00f8rre end b\u00e6reline-b\u00f8jerne. Nogle havb\u00f8nder bruger ogs\u00e5 farvestr\u00e5lende b\u00f8jer eller b\u00f8jer med faremarkeringer (kaldet regulatoriske markeringsb\u00f8jer eller RMB'er) til at markere omkredsen af deres aktive dyrkningssted.<\/p>\n\t\t\t\t\"Growline\n\t\tB\u00e6reline-b\u00f8jer, illustration fra GreenWave\n\t\t\t\t\"Anchor\n\t\tAnkerlineb\u00f8je, illustration fra GreenWave\n

    \n\t\t\tAnkre\t<\/h4>\n\t

    Det er ankrene, der holder dit udstyr fast til havbunden, holder det p\u00e5 plads og hj\u00e6lper med at opretholde sp\u00e6ndingen. Ankrene er forbundet med b\u00e6relinen med en ankerline og nogle gange en k\u00e6de. Tilsammen kaldes det segment, der fastg\u00f8r den flydende del af anl\u00e6gget til ankeret p\u00e5 bunden, for ankerroden.<\/p>\n

    In the diagram, you’ll notice we’ve incorporated the use of a tensioning buoy along the span of the anchor line. This small buoy raises in position in the water at low tide, helping to maintain tension on the growline as the water level fluctuates. Tag lines run from the anchor to a retrieval buoy on the surface, which helps farmers locate the anchor for retrieval or tensioning.<\/p>\n\t\t\t\t\"Anchor\n\t\tAnker og ankerline, illustration fra GreenWave\n

    \n\t\t\t5-linesystem\t<\/h3>\n\t

    Det 5-linede sprederb\u00f8jledesign bygger p\u00e5 den samme grundops\u00e6tning som den enkeltlinede opstilling, men inkorporerer brugen af sprederb\u00f8jler til at holde flere b\u00e6reliner t\u00e6t p\u00e5 hinanden i den samme opstilling. Brugen af sprederb\u00f8jler \u00f8ger markant antallet af b\u00e6reliner, der kan udl\u00e6gges per ankerpar, og kan \u00f8ge dyrkningskapaciteten i en havmark betydeligt uden at \u00f8ge det samlede aftryk p\u00e5 havbunden.<\/p>\n

    In the diagrams, you’ll notice that the profile view of the 5-line array looks similar to that of the single-line array. The anchoring system is virtually identical, though the anchors will need to be larger due to the increased weight and drag of the additional growlines. One notable difference between the two systems, however, is that the 5-line array does not incorporate buoys spliced directly to the growline. Instead, flotation buoys are attached with a bridle to the spreaders themselves. This bridle system is the unique element of the 5-line array.<\/p>\n\t\t\t\t\"5-line\n\t\tSprederb\u00f8jle set fra siden, illustration fra GreenWave\n\t\t\t\t\"5-line\n\t\tSprederb\u00f8jle set fra luften, illustration fra GreenWave\n

    \n\t\t\tSprederb\u00f8jle\t<\/h4>\n\t

    I en typisk 5-liners opstilling er sprederb\u00f8jlen et 3 meter langt aluminiumsr\u00f8r med en diameter p\u00e5 7,5 cm og svejsede \u00f8jer til forskellige linetilslutninger. Sprederne er placeret i hver ende af opstillingen og med 30 meters mellemrum langs b\u00e6relinen. De holder fem parallelle b\u00e6reliner i en fast afstand fra hinanden.<\/p>\n

    \n\t\t\tT\u00f8jlesystem\t<\/h4>\n\t

    Der bruges to t\u00f8jlesystemer i sprederb\u00f8jle-opstillingen: Et vandret og en lodret. Det vandrette t\u00f8jlesystem best\u00e5r af 3 liner, der l\u00f8ber fra sprederen til et forbindelsespunkt med ankerlinen under vandet. Det lodrette t\u00f8jlesystem g\u00e5r fra hver ende af sprederb\u00f8jlen til en b\u00f8je p\u00e5 overfladen. De to t\u00f8jlesystemer danner hver deres trekant.<\/p>\n\t\t\t\t\"Woods\n\t\tWoods Hole Oceanographic Institution via GreenWave\n\t

    Billedet ovenfor viser et undervandsbillede af b\u00f8je- og t\u00f8jlesystemet for enden af en sprederb\u00f8jle-opstilling. Siderne af den sorte trekant afgr\u00e6nser t\u00f8jlelinerne, der l\u00f8ber fra hver ende af spredejernet til en b\u00f8je p\u00e5 overfladen.<\/p>\n

    Diagrammet ovenfor viser et sp\u00e6nd p\u00e5 30 meter mellem sprederb\u00f8jlerne, hvor der ikke bruges nogen mellemliggende opdriftsb\u00f8jer. Men nogle havmarker bruger meget l\u00e6ngere sprederb\u00f8jlesystemer, og i s\u00e5 fald bruges en mellemliggende sprederb\u00f8jle, kaldet en midterspreder, med en b\u00f8je og t\u00f8jle til at give flydeevne langs b\u00e6relinerne. Generelt anbefaler vi at tilf\u00f8je en midterspreder for hver 30 meter b\u00e6reline.<\/p>\n

    Sprederb\u00f8jlesystemet er et ret nyt koncept, og havh\u00f8sterne er stadig i gang med at finde frem til de bedste designs, herunder hvorn\u00e5r og hvor der er brug for ekstra spredere og b\u00f8jer langs b\u00e6relinerne. Det kan v\u00e6re n\u00f8dvendigt at eksperimentere lidt for at finde ud af, hvad der fungerer bedst for dit sted og dit system. Nogle havh\u00f8stere foresl\u00e5r, at man starter med minimal flydeevne og tilf\u00f8jer spredere og flydeb\u00f8jer i midten af sp\u00e6ndet, n\u00e5r afgr\u00f8den er begyndt at vokse.<\/p>\n

    Maintaining even tension throughout the 5-line system is crucial to its success and stability. This can be achieved with careful preparation and monitoring once it has been deployed. When assembling the system on land, it’s critical that the growlines are measured under tension and cut to matching lengths; otherwise, the system will hang lopsided in the water.<\/p>\n

    For at sikre, at hele systemet holdes under konstant sp\u00e6nding, anbefaler vi at bruge sl\u00e6beankre, som kan justeres, n\u00e5r anl\u00e6gget er i vandet. Derudover reducerer sp\u00e6ndingsb\u00f8jer og\/eller en l\u00e6ngde k\u00e6de langs ankerroden slapheden p\u00e5 linerne ved lavvande.<\/p>\n

    The 5-line system is more complex than the single-line array and requires a bit of precision and finagling to get right, so we don’t typically recommend it for first-year farmers. But, again, the benefit of the 5-line is that it allows for significantly higher production without an increase in farm footprint.<\/p>\n

    \n\t\t\tSammenkoblet system\t<\/h3>\n\t

    Den mest komplekse opstillingstype er det sammenkoblede system, der nogen gange g\u00e5r under navnet catenary. I mods\u00e6tning til enkelt- og 5-linjers opstillinger, der har to ankerpunkter, bruger det sammenkoblede system f\u00e6rre, men st\u00f8rre ankre til at sikre hj\u00f8rnerne af en matrice af t\u00e6tliggende b\u00e6reliner. I hver ende af opstillingen bruges en buet vandret linje, kaldet en catenary-rammeline, til at fastg\u00f8re b\u00e6relinerne til ankersystemet. Der er eksempler p\u00e5 sammenkoblede systemer med helt op til 55 individuelle b\u00e6reliner med kun et par meters mellemrum.<\/p>\n

    Vi har medtaget denne opstillingstype for at give dig et billede af hele spektret af mulige designs til din havmark, men vi anbefaler ikke brugen af dette design til f\u00f8rstegangsbrugere. Det kr\u00e6ver betydelig ekspertise inden for havteknik at designe og installere det korrekt samt betydeligt st\u00f8rre udstyr.<\/p>\n\t\t\t\t\"Catenary\n\t\tSammenkoblet catenary-design, illustration fra GreenWave\n\t\t\t\t\"Catenary\n\t\tCatenary-design, illustration fra GreenWave\n\t

    Fordelen ved det sammenkoblede anl\u00e6g er, at det giver mulighed for meget t\u00e6ttere pakkede b\u00e6reliner end andre anl\u00e6gstyper. Ulempen er, at de ankre, der skal bruges, er meget st\u00f8rre end dem, der skal bruges til enkelt- og 5-linede systemer. P\u00e5 samme m\u00e5de skal der bruges f\u00e6rre, men st\u00f8rre b\u00f8jer for at opretholde den rette opdrift i systemet.<\/p>\n

    Korrekt og ensartet stramning er afg\u00f8rende for dette design. N\u00e5r systemet l\u00e6gges ud, skal hver b\u00e6reline str\u00e6kkes (eller forsp\u00e6ndes) med samme kraft, f\u00f8r den m\u00e5les og sk\u00e6res til i l\u00e6ngden. N\u00e5r linerne er klippet, samlet og sp\u00e6ndt korrekt, vil de bevare deres parallelle positioner, og anl\u00e6gget vil ligge j\u00e6vnt i vandet.<\/p>\n

    Due to the curved shape of the catenary framing line, it’s possible to maximize the growing area of the array by cutting each growline to a different length. However, this can sometimes lead to confusion, as it’s easy to get lines mixed up. Another solution is to cut all the growlines to equal length and have different length extension lines that connect the growlines to the catenary framing lines on either end. Either way, there is quite a bit of math that needs to be done to figure out the length to which each segment should be cut to maintain the proper shape of the catenary framing line.<\/p>\n

    We want to reiterate that this is a highly advanced design concept. Many farmers using the catenary system hire an engineer to help them with the design process. We do not recommend it for first-time farmers. If you’re considering a catenary array for your site and you’re not an engineer, we recommend that you hire one to steer you in the right direction.<\/p>\n

    It should also be noted that not every site can support a large-scale array, even with a large enough lease site. The catenary array can produce several hundred thousand pounds of biomass on a single site, and many areas don’t have enough nutrients in the water to support that level of crops. You should have a good understanding of the nutrients in your area-not to mention an established market for your produce-prior to investing in such a large and complex array.<\/p>\n

    \n\t\t\tOnline designv\u00e6rkt\u00f8j\t<\/h3>\n\t

    GreenWave has developed a nice online tool for designing your ocean farm. It’s free and available as part of GreenWave’s Ocean Farming Hub<\/a>. Du skal oprette en profil hos GreenWave for at bruge v\u00e6rkt\u00f8jet, men vi anbefaler st\u00e6rkt, at du g\u00f8r det som en del af din rejse mod regenerativ havdyrkning.<\/p>\n\t\t\t\t\"Screen\n\t\tScreen dump from GreenWave’s Farm Planning Tool\n\t

    Farming the ocean means navigating hundreds of unseen factors to support a floating system of lines and buoys. Every farm is different because all designs must ultimately be site-specific. Localized forces such as the current speed and direction, the exposure of your site, even the nutrient availability in the water, which influences the ultimate biomass of your kelp-all these factors will impact the drag on your system. The drag, in turn, dictates the size of your anchor, which impacts your lease area and your eventual startup costs.<\/p>\n

    When you’re just starting out, it can be overwhelming to try and keep all these different factors and impacts straight. For years, GreenWave has watched farmers in the US struggle with these complicated calculations, wishing there was an easier way. That’s why they built the Farm Design Tool: to do the math for you, so you can make the big-picture choices of how to ultimately construct and operate your farm.<\/p>\n

    GreenWave recommend that you use the Farm Design Tool early and often throughout your farm startup journey. First, use the Tool to learn. Get to know how site depth impacts lease size, how current changes anchor size, and how all these factors ultimately impact cost. Manipulate these variables to inform your thinking as you’re deciding what type of farm system to pursue. Then, use the Tool again as a planning resource when you’ve chosen a site and want to narrow in on the details.<\/p>\n

    The Farm Design Tool is a modeling tool built on a series of assumptions that inform the calculations behind the scenes. It isn’t perfect; there are some limitations. You should be aware of these assumptions and know that you’ll likely need to make some modifications to your design to suit the particulars of your site. Before you finalize your farm plans or make any major financial investment in your farm gear, you might want to verify your designs with a marine engineer.<\/p>\n\t\n\t\t\t\t\t\tAdapted with permission from GreenWave\n\t\t\t\t\t<\/a>\n\t\n\t\t\t\t\t\tForrige Lektion\n\t\t\t\t\t<\/a>\n\t\n\t\t\t\t\t\tN\u00e6ste Lektion\n\t\t\t<\/a>","protected":false},"excerpt":{"rendered":"

    Lesson 3 Lesson 3: Setting up an ocean farm The lesson is currently available in English, Danish & Lithuanian Introduction The great thing about ocean farming is that farm designs are modular, scalable, and can be easily adapted to suit your site. 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