The impact of mangrove damage on tidal flooding in the subdistrict of Tugu, Semarang, Central Java

Abstract

Expansion of industrial areas, aquaculture, settlements, and limited knowledge of the community about the function of mangroves allegedly led to the conversion of mangrove functions in the early 1990s. This study aimed to map the condition of mangroves from 1988, 1990, 1995, 2008, to 2021 and their effect on the widespread of tidal flooding in three villages (Mangkang Kulon, Mangunharjo, Mangkang Wetan) in Tugu subdistrict, Semarang City. The research method was carried out by using spatiotemporal analysis of Landsat 5 and Landsat 8 imagery through the supervised approach (Maximum Likelihood algorithm). In order to map the correlation of mangrove damage with the widespread impact of tidal flooding, an overlay analysis of land use maps was carried out in 1988, 1990, 1995, 2008 and 2021. The results of the study showed that mangrove damage is correlated with the widespread of tidal flooding that drowns settlements, ponds, and agricultural land. Data analysis showed that the mangrove area in three villages has decreased from 1988 to 2021, covering an area of 242.66 ha. This condition is one of the triggers for the increase in tidal flooding area from 1988 to 2021, covering an area of 253.135 ha. As a natural barrier to prevent abrasion and tidal flooding, mangrove conservation is very necessary, considering the impact of tidal flooding on the coast of Semarang City is increasingly widespread.

Mangrove area degradation and management strategies in Indonesia: A review

“…The review above shows that coastal areas play an important role in national development because they are the main sector that promotes economic growth and controls ecosystem balance. Various economic activities that are currently widely developed in coastal areas, including tourism, transportation, pond cultivation, and fishing, and support for the oil and gas offshore mining sector often cause conflicts of interest, leading to socio-economic, institutional, and ecological problems (Utami et al, 2021;Analuddin et al, 2023). This review shows that the lack of trust, support, and community inclusion in coastal management are the dominant factors of program failure (Yamindago, 2015;Dalimunthe, 2018;Eddy et al, 2021;Damastuti et al, 2022).…”

Dampak pembangunan Jalan Balige bypass terhadap alih fungsi lahan Kabupaten Toba

“…Hal inilah yang memicu terjadinya tekanan pemanfaatan ruang maupun penggunaan lahan terutama pada wilayah dengan lokasi strategis/memiliki nilai ekonomi tinggi (Muhajir, 2017). Tekanan terhadap ruang/tanah yang terus meningkat membawa dampak pada semakin meningkatnya permasalahan/konflik pemanfaatan atas ruang (Katiandagho et al, 2017;Utami, Wibowo, et al, 2021;Zhang et al, 2021). Hasil kajian beberapa peneliti menunjukkan pembangunan infrastruktur maupun kebutuhan masyarakat akan pemukiman seringkali harus mengorbankan lahan sawah yang berujung pada penurunan luas lahan pertanian (Tantja et al, 2021;Utami, Nurcahyanto, et al, 2021).…”

Mangrove damage based on canopy density derived on SPOT 6 at Ngurah Rai forest park, Bali

“…[8] said that aquaculture activities had caused damage to mangroves over the past two decades. [9] stated that the damage to mangroves in Semarang correlated with the widespread tidal flooding that submerged settlements, ponds, and agricultural land. The impact of climate change and sea level rise is also known to influence the degradation of mangrove ecosystems considerably [10] [11] [12].…”