Quantification of Harvestable Seaweed using a Topographic-bathymetric Lidar System

阿卡迪亚海洋植物有限公司(ASL)是国际公认的海洋植物产品行业的领导者。 ASL总部设在新斯科舍省，从大西洋和墨西哥湾的潮间带收获海藻 Fundy海岸。ASL目前在70多个国家销售他们的产品，在全球创造了近600个就业机会 并为当地经济带来了超过4000万美元的收入。ASL致力于运营一个负责任的、 海藻产业是可持续的，因此进行研究以确定最佳做法的历史由来已久。 为了确保对这种可再生资源的适当管理，他们监测其租赁沿线的收获和生长情况 海岸线。目前，这项任务是通过地面横断面和准确记录收成来执行的 这一过程是劳动密集型的，而且偏向于更容易到达的海岸线。利用卫星遥感来 绘制海藻地图依赖于海藻在退潮时获得的数据，当时海藻暴露在没有云或雾的情况下， 从而限制了获取时间段。新斯科舍社区学院应用地球信息学研究小组 (AGRG)将探索一种新的遥感技术--机载地形测深激光雷达--以帮助ASL 在新的和创新的云芝资源测绘和监测方面取得了进展。具体而言，AGRG将收购 美国西南新星租赁海岸线段多年地形-水深激光雷达数据集 Scotia在低潮和涨潮时，立即收获后，并在收获后一年确定资源 评估、收获的生物量和增长率。NSCC的新传感器可能会消除 低潮采集以获得海藻测量值的要求。此外，一个流体动力学模型 因为该网站将运行以调查当前速度和其他可能影响任何增长的动态特征 站点内的比率差异。这项创新研究的结果将有助于ASL更有效地监测 呈现资源并更准确地评估新领域的资源，并帮助ASL向更具空间性的 集成的工作流程。新斯科舍省渔业和水产养殖部负责批准 租赁和确保收获业务是可持续的，并为该项目提供资金支持。

Acadian Seaplants Limited (ASL) is an internationally recognized leader in the marine plant product industry. Based in Nova Scotia, ASL harvests the seaweed (rockweed) from intertidal areas on the Atlantic and Bay of Fundy coasts. ASL currently sells their products in more than 70 countries, creating close to 600 jobs in the Maritimes and bringing more than $40 M to the local economy. ASL is dedicated to running a responsible, sustainable, seaweed industry and as such has a long history of conducting research to determine best practices. To ensure proper management of this renewable resource, they monitor harvesting and growth along its leased coastlines. Currently, this task is executed using ground transects and accurate recording of harvests, though this process is labour intensive and biased to more accessible coastlines. The use of satellite remote sensing to map the seaweed relies on data acquired at low tide when the seaweed is exposed and no clouds or fog present, thus limiting acquisition time periods. Nova Scotia Community College's Applied Geomatics Research Group (AGRG) will explore a new remote sensing technology - airborne topographic-bathymetric lidar - to assist ASL in new and innovative mapping and monitoring of the rockweed resource. Specifically, AGRG will acquire multi-year topographic-bathymetric lidar datasets for a section of ASL leased coastline in Southwest Nova Scotia at low and high tide, immediately post-harvest, and one year post-harvest to determine resource assessment, harvested biomass, and growth rates, respectively. NSCC's new sensor potentially eliminates the requirement for low tide acquisition to obtain measurements of seaweed. In addition, a hydrodynamic model for the site will be run to investigate current speeds and other dynamic features that may influence any growth rate variance within the site. The results from this innovative study will assist ASL to more efficiently monitor present resources and more precisely assess resources in new areas, and help ASL move to a more spatially integrated workflow. The Nova Scotia Department of Fisheries and Aquaculture is responsible for permitting the leases and ensuring the harvest operations are sustainable, and are financially supporting the project.