Data from observations of the role of water hyacinths in macroplastic transport and accumulation

This dataset presents the observations from a monitoring campaign conducted at Ho Chi Minh City (HCMC), Vietnam, in April-June 2020. The campaign focused on the Saigon river and aimed at quantifying the role of water hyacinths in macroplastic transport and accumulation. The first sheet pertains to the visual counting of floating macroplastic items from the Thu Thiem bridge at HCMC. It details the number of macroplastic items counted within water hyacinths (entangled) and outside (free-floating). The second and third sheet present the results from aerial surveys conducted on 23 May 2020 with a UAV. The second sheet details all floating macroplastic items identified through manual labelling on the drone imagery and provides information on their size and polymer composition The third sheet presents the results from the identification of floating vegetation (water hyacinths) through color segmentation and their areas.

本数据集呈现了2020年4月至6月在越南胡志明市（Ho Chi Minh City, HCMC）开展的监测活动的观测数据。本次监测活动聚焦西贡河，旨在量化水葫芦（water hyacinths）在大型塑料（macroplastic）输运与积聚过程中所发挥的作用。首个工作表对应于在胡志明市守添桥开展的漂浮大型塑料目视计数工作，详细记录了缠绕于水葫芦丛中的大型塑料与自由漂浮的大型塑料的数量。第二、第三工作表呈现了2020年5月23日使用无人机（UAV）开展的航空勘测结果：第二张工作表详细列出了通过对无人机影像进行人工标注所识别的全部漂浮大型塑料，并提供了其尺寸与聚合物组成相关信息；第三张工作表则呈现了通过色彩分割技术识别出的漂浮植被（水葫芦）及其覆盖面积的统计结果。