Abstract
Semarang City as one of the areas on the north coast has a serious problem related to tidal flooding. The impact of this disaster has implications for changes in land use, a decrease in environmental quality and health, the emergence of slum settlements, a decrease in income and also a decrease in land value. This study aims to map the impact of tidal flooding on changes in land values based on the Land Value Zone Map (ZNT) and map land prices based on spatial data analysis. The study was carried out through spatial analysis by overlaying (join intersection) the 2014, 2016, 2018 and 2019 ZNT maps to determine changes in land value, while mapping land prices, especially in Mangunharjo Village, was based on land use maps, positive accessibility (road network) and negative accessibility (prone flood rob). The results of the study show that land which is permanently affected by tidal flooding and cannot be used anymore makes it a lost / destroyed land, while periodically inundated land has experienced a price decline in the range of Rp 100.000 – 200.000, -/m2. Meanwhile, the results of the study from the ZNT map for 2014 to 2019 show a very significant difference in price between zone 1 and a price increase of ± Rp 3.500.000; zone 2 price increase ± Rp 575.000, -, zone 3 at a price range of Rp 385.000, and zone 4 as the tidal flood prone zone only experienced an increase of Rp 250.000,-. In this context, the variable of tidal flooding vulnerability greatly affects the stagnation of land prices and even decreases in land prices, while the positive accessibility variable is the location of land on national and local roads that has experienced a very high price increase.
Highlights
Based on the aforementioned background, this study aims to map the impact of tidal flooding on changes in the temporal land value in the coastal areas of Semarang City, especially in Tugu District, based on the Land Value Zoning (ZNT) maps
In addition to analyzing changes in land value based on the ZNT maps, in this study was conducted a spatial analysis related to land value using several variables: land use, road accessibility, and the threat of tidal disasters in Mangunharjo Sub-district which was affected by massive tidal flooding
Tidal flooding has a negative impact on various aspects of community life on the north coast, one of which is the decline or stagnation of land values
Summary
As the center of trade, industry, and government, cannot resist from the threat of climate change as well, especially the tidal flood disaster (Marfai et al 2008; Kahar et al 2010; Pujiastuti 2015). Tidal flooding has had a tremendous impact (Marfai 2008; Ballesteros 2018) As it occurs in Semarang city, tidal flooding has resulted in people losing their settlements, livelihoods, and arable lands, damaged infrastructure, a decrease in environmental. Based on the aforementioned background, this study aims to map the impact of tidal flooding on changes in the temporal land value in the coastal areas of Semarang City, especially in Tugu District, based on the Land Value Zoning (ZNT) maps. In addition to analyzing changes in land value based on the ZNT maps, in this study was conducted a spatial analysis related to land value using several variables: land use, road accessibility, and the threat of tidal disasters in Mangunharjo Sub-district which was affected by massive tidal flooding
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