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Số người truy cập: 86,129,729

Tác giả hoặc Nhóm tác giả: Tamás FRÁTER, Tatjána JUZSAKOVA, Le Phuoc CUONG, László DIÓSSY, Raduly ISTVÁN, Ákos RÉDEY
Nơi đăng: ELSEDIMA International Conference – 26 – 28 May 2016, Cluj-Napoca, Romania; Số: 11;Từ->đến trang: 26-28;Năm: 2016
Lĩnh vực: Môi trường; Loại: Báo cáo; Thể loại: Quốc tế
Unmanned Aerial Vehicles (UAVs) provide a new, highly efficient, economic alternative to the aerial environmental monitoring, e.g. photogrammetry, sensor based surveying or sampling. In photogrammetry, aerial photos taken from vertical axis are useful in geoinformation systems by transforming them into orthographic projection and use as map layers. These airborne photographs could be conventional high-resolution photos or ones from a well-defined spectral range (multi/hyperspectal imaging, IR/UV imaging). Both of them can be used in environmental monitoring. The conventional high- resolution photographing is applicable in the monitoring of natural reserve areas (e.g. biodiversity), disaster zones (flooding, forest fire, chemical/nuclear contamination etc.), or check of areas which are potentially dangerous for the environment (pit heaps, slurry storage areas, landfills etc.). Multi- and hyperspectral photographing is applicable in the agriculture (for distinguishing the healthy and unhealthy vegetation) and in the environmental monitoring (measurement and mapping of pollutants such as an oil spill on a lake or sea). In our experimental work two UAVs have been purchased: a MULTIPLEX Easy Star and a STYROMAN Smile. Using a lightweight full-HD camera, aerial photos were made in Bakony mountains from normal perspective and from vertical perspective as well. In this area, a small lake was photographed, where the beginning of eutrophication was detected, which could hardly be observed from ground, however, it is visible on the aerial photos. Further photographs were made for the identification of ragweed (Ambrosia sp.) also in the area of Bakony. We found that both UAVs are feasible for the aforementioned environmental monitoring tasks. UAVs are pronouncedly advantageous in the monitoring of natural reserve areas since they are very silent and contrary big aircrafts and helicopters, do not disturb the ecology even in natural reserve areas, moreover they could be operated in a very flexible and economic way , and the resulting aerial photos are very informative.
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