<p>The rapid development of Balikpapan City has an impact on the increasingly high demand for land for urban expansion needs. The expansion of Balikpapan City is more directed towards coastal areas which are dominated by mangrove forests. This study discusses the destruction of the mangrove forest and its causal factors and how conservation efforts are being carried out to maintain sustainability. Mangrove forest damage data obtained through surveys and image analysis using NDVI. While the factors causing the damage to mangrove forests were obtained from observations and interviews with the mangrove center manager of Balikpapan. The results showed that there were many mangrove forests that had rare or already damaged that were spread in the West Balikpapan, North Balikpapan, and East Balikpapan Sub-district. This damage is caused by natural and non-natural factors. Natural factors that cause damage to mangrove forests are pests and sedimentation. The non-natural factors are due to the pollution and the opening of fish ponds. Preservation efforts are carried out by replanting mangroves which are only carried out by the mangrove center and some CSR and environmentalists and do not involve the community at large. These Conditions make the mangrove forest in Balikpapan City threatened its sustainability.</p>
<p><em>Grobogan </em><em>regency</em><em> is a </em><em>regency</em><em> in central java which getting a lot of drought in dry season. The drought has an impact on various sectors of life, including agriculture. This research aims to</em><em> measure the land suitability for soybean in Grobogan as an adaptation to drought season. This research is in descriptive qualitative, using purposive sampling technique to get soil sample based on the type of soil. Data collection techniques were observation, interviews, laboratory analysis. Analysis of land suitability for soybean plants by matching the quality and characteristics of land in Grobogan </em><em>Regency</em><em> with the conditions for growing soybean plants. The result of this study is (1) the actual land suitability for soybean plants in Grobogan </em><em>Regency</em><em> shows a marginal appropriate class (S3) covering 85024.98 ha or 43.03%, not suitable (N1) covering 4792,925 ha or 2.43% and not permanently suitable (N2) covering 1896.49 ha or 0.96%. (2) Through improving the quality of land characteristics to the management of a high level of land suitability, potential can reach a sufficiently suitable class (S2) covering an area of 85248.10 ha or 43.14%, marginal appropriate (S3) covering an area of 3824.37 ha or 1.94% and not suitable (N1) totaling 2641.92 ha or 1.34% .</em><em></em></p>
<p>Indonesia is a country traversed by the Pacific ring of fire and is also the meeting point for tectonic plates, making it prone to various disasters including earthquakes. Many victims who fell during the earthquake disaster were due to a lack of understanding of the community in dealing with the disaster. An understanding of the community regarding earthquake disasters is needed to reduce the risk of earthquake disasters, one of which is done for students. Efforts to reduce earthquake risk can be done by developing earthquake learning media and applying it to students. The development of this learning media uses the 4D Model. The results showed that the use of earthquake learning media was effective in increasing students' understanding in dealing with earthquake disasters, so that this could unravel the risk of earthquake disasters for students.</p>
Extreme weather is one of the natural disasters that occur in Kupang City, East Nusa Tenggara Province. Like other natural disasters, extreme weather also has a detrimental impact on people's lives. The purpose of this study was to determine the extent of extreme weather levels in each sub-district in Kupang City with mapping. This research is included in quantitative descriptive research, then the population and the sample used is Kupang City. The data collection method used the Landsat 8 OLI image interpretation and the data trajectory model. The data analysis technique used overlay analysis with the division of three classes of extreme weather levels, low, medium, and high. Based on the research results, it is 79.53% or with an area of 143.399 km2, Kupang is included in the extreme weather area with high criteria. The sub-district has the largest percentage range of high-level extreme weather in Kupang City is the Kota Lama sub-district. Meanwhile, the sub-district has the largest percentage of area to extreme weather with a low level is Alak sub-district.
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