Abstract
In the northern coast of East Java, mangrove naturally growth along the coastline of most regencies, and becomes the important factor in the sustainability of fisheries, protection and other environmental services for communities in coastal areas. The last few decades, satellite remote sensing becomes the most widely used tool for mangrove monitoring purpose. Various types of sensory satellite images are used for mapping areas, types and densities, estimating the mangrove biomass. Meanwhile, UAV (Unmaned Aerial Vehicle) is rapidly developed and quite affordable. Various footages and photogrammetry works carried out with the lightweight UAV. Therefore, utilizing UAVs for capturing mangrove areas can be an effective solution to identify area where rehabilitation should be conducted. The research aimed to use the consumer grade DJI Phantom 4 Pro for mapping 92,6 Ha mangrove area in Rejoso (Pasuruan) and 69,37 Ha of Sumberasih (Probolinggo). Result of this study shows the capability of UAV to provide detail mangrove image (canopy density, characteristics and environmental profile), which can be used to support the management activities, particularly mangrove replantation program. Also, it could be a low cost solution and time effective of mangrove monitoring, compared with previous approach of high-resolution satellite imagery.
Highlights
Mangroves in practical definition are typical plants that grow on the seashore or the river estuary, influenced by tides and able to adapt with saline water of tropical and sub-tropical regions
The distribution of the area and mangrove forests in East Java Province is dominant on the northern coast such as in Lamongan, Gresik, Surabaya, Sidoarjo, Pasuruan, and Probolinggo Regencies
The mangrove area in the east lies in the districts of Jember, Banyuwangi and Situbondo, which in the colonial period were the areas of the Besuki Residency, a small portion is on the south coasts such as in Clungup (Malang), Sine and Brumbun Beach (Tulungagung) and Pancer Cengkrong Beach (Trenggalek)
Summary
Mangroves in practical definition are typical plants that grow on the seashore or the river estuary, influenced by tides and able to adapt with saline water of tropical and sub-tropical regions. Mangroves cannot grow on the steep coast with strong waves and high tides because this does not support the deposition of muds and sands as substrate that required for their growth [1]. About 3 million hectares of mangrove forest grow along 95,000 kilometers of coastal Indonesia. This number represents 23% of the world's total mangrove ecosystem [7]. The distribution of the area and mangrove forests in East Java Province is dominant on the northern coast such as in Lamongan, Gresik, Surabaya, Sidoarjo, Pasuruan, and Probolinggo Regencies. Regarding its spreading area and extents, mangrove forest considered into one of the important habitats to be managed in East Java Province
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