The Dynamics of Coastline and Mangrove Ecosystems in Coastal Area of Mangkang Kulon Subdistrict, Semarang

Abstract

Mangkang Kulon Subdistrict is one of the coastal areas in Semarang that has relatively dynamic conditions, which seen from the coastline and mangrove ecosystem changes within several years of observation. This study aims to observe coastline changes and the spatial distribution of mangrove ecosystems on the coast of Mangkang Kulon Subdistrict between 2005, 2012 and 2019. Land use n were obtained from visual interpretation of high-resolution digital globe satellite images from 2005, 2012, and 2019 which then tested the accuracy of land use interpretation through field observation and overlaid one another through vector analysis to find out the changes that have occurred. The study showed that the coastline changes were increasingly jutting towards the land in this range of time. This condition is affected by the port construction on the east coast of the Kendal Regency, which directly adjacent to the Mangkang Kulon Subdistrict. Meanwhile, the mangrove ecosystem has increased widely with relatively elongated and grouped spatial patterns. The increase that occurred as a manifestation of various coastal care activities in the form of mangrove planting activities carried out by several government agencies and private parties with a model of coastal community empowerment.

Analysis of Mangrove Species Distribution Mapping and the Environmental Problem in Mangkang Kulon, Semarang City

“…Table 1 shows the area of mangrove is about 8.6 hectares or only 2% of Mangkang Kulon. This result lower compare [22] because of different spatial resolution, which in this research was lower resolution. Hence our classification didn't detect small existence of mangrove tree such as from restoration project and based only from spectral library.…”

“…Main approach alongside the restoration program is initiated mangrove for tourist destinations. Restoration itself successfully increased mangrove distribution which was conducted by government agencies, private companies, and empowered local coastal communities [22]. The derivative product is Edu-Eco Mangrove Tourism which supports restoration both in community and financial [30].…”

Land Use Change Analysis to Springs Conditions in Gunungpati Sub-District, Semarang City

“…Existing land use in 2021 at the research location in Gunungpati Sub-District was obtained from visually interpretation high-resolution images guided by 9 elements (Martuti et al, 2020;Janah & Nugraha, 2021). Based on the results, 5 classes of land use in the region were obtained, including settlements, agricultural land, mixed gardens/vegetation, service/commercial buildings and open land.…”

The Assessment of Water Compatibility of Adaptable Stick-Net Cage for Resilience Milkfish Cultivation in Tanjung Mas, Indonesia

“…In addition, the increase of industry, housing, and commercial spaces have decreased pond cultivation areas in Semarang. As a result, milkfish farmers experience a decline in milkfish production, threatening business stability (Martuti et al, 2020) and lowering resilience against climate change (Bosma et al, 2017;Purwaningsih & Hermawan, 2021), land-use conflicts, and potential threats from anthropogenic factors, including industrial and household waste (Henriksson et al, 2019). A case study in the Tanjung Mas water area shows that the high-risk milkfish cultivation due to climate change and land-use conflict has prompted milkfish farmers to change to using cages planted in coastal waters.…”