scholarly journals Dynamic model of land use change in landslide hazard zones in Tanah Datar District, West Sumatra

2019 ◽  
Vol 314 ◽  
pp. 012070
Author(s):  
Iswandi Umar ◽  
Indang Dewata ◽  
Eri Barlian
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Dynamic Model ◽  
Landslide Hazard ◽  
West Sumatra

Analisis Alih Fungsi Lahan Menggunakan Regresi Logistik Ordinal

2022 ◽  
Vol 7 (2) ◽  
pp. 173-184
Author(s):  
Ani Apriani ◽  
Bayurohman Pangacella Putra
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Secondary Data ◽  
Observation Point ◽  
Landslide Hazard ◽  
Trigger Factor ◽  
Primary Data ◽  
P Value ◽  
Land Conversion ◽  
The Impact

The occurrence of landslides can not be separated from conditions that are prone to landslide movements such as steep slopes and high rainfall. The occurrence of landslides is also exacerbated by the indiscipline of the community in using land according to its function, which is called land conversion which can be a trigger factor for landslides. Conducting research on land use change is important to see the impact caused by human activities. The purpose of this study was to analyze the effect of land conversion on landslide hazard levels in Samigaluh District, Kulon Progo Regency. The method in this research was descriptive quantitative using primary data, namely field surveys and secondary data collection. The steps on this research were conducting field observations about the occurrence of land conversion and then retrieving level of landslide hazard at the observation point of land use change. Data analysis was performed using ordinal logistic regression. The result of the analysis showed that the p value (0.036) <0.05 which meant H0 was rejected. Thus, at the 95% confidence level it could be said that the variable of land use change affected the level of landslide hazard in Samigaluh District, Kulon Progo Regency. This output could be considered for the community to use the land according to its function.  Key words: Land Function Change; Landslide; Ordinal

scholarly journals PENCUCIAN BAHAN ORGANIK TANAH PADA TIGA PENGGUNAAN LAHAN DI DAERAH HUTAN HUJAN TROPIS SUPER BASAH PINANG-PINANG GUNUNG GADUT PADANG

Jurnal Solum ◽  
2011 ◽  
Vol 8 (1) ◽  
pp. 34
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Adrinal Adrinal ◽  
Arief Fauzan Hakim
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Soil Surface ◽  
Soil Samples ◽  
Annual Rainfall ◽  
Undisturbed Soil ◽  
Physical Laboratory ◽  
West Sumatra

Study about soil organic matter (SOM) leaching in soil profiles of tropical rain forest was conducted in Bukit Pinang-Pinang, the upper footslope of Mt. Gadut in West Sumatra, and in Soil Physical laboratory Andalas University Padang.  Bukit Pinang-Pinang is located on 480-640 m asl and geographically is between 100°29’40” and 100°30’20 E”  as well as between 0°54’55” and 0°55’45”S.  This rain forest area is known as a super wet area because it receives high annual rainfall (>3500 mm).  The objective of this research was to measure the amount of SOM leached from top soil into the deeper soil.  Undisturbed soil samples were taken from three different land uses, forest, bush, and mixed garden, on the top, middle, and foot slopes.  Undisturbed soil samples were leached with distilled water as the amount of rainfall accepted in natural condition. The results showed that, land use change from forest into ecosystems of mixed garden (for over 50 years with 100% soil surface coverage and without any cultivation) and bush land (for over 20 years left) did not cause the SOM content in the profiles decreased. Amount of SOM leached from the top 0-10 cm was found greater from mixed garden, then followed by forest on the upper slope, forest on the middle slope, and bush area.Keywords: SOM leaching, land use change, tropical rain forest, bush, mixed garden

scholarly journals Arahan Kebijakan Untuk Mengurangi Dinamika Penggunaan Lahan pada DAS Antokan, Provinsi Sumatera Barat

2021 ◽  
Vol 11 (1) ◽  
pp. 10-18
Author(s):  
Iswandi Umar
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Population Growth ◽  
The Other ◽  
Land Use Conversion ◽  
West Sumatra ◽  
Open Land ◽  
Overlay Technique ◽  
Policy Direction ◽  
Land Use Maps

The need for land has increased every year, and this increase is caused by the rate of population growth, resulting in changes in land use. Uncontrolled land use conversion has led to catastrophic flooding in the Antokan watershed. The purpose of this study was to determine the direction of land use change policies in the Antokan Watershed, West Sumatra Province. To determine land use change using the GIS method with the overlay technique of land use maps for the period 2000-2020. Furthermore, to determine the policy direction using the ISM method involving 20 experts. Research results in the Antokan watershed have shown changes in land use of 4,178 hectares during the 2000-2020 period. Changes occur in forest areas, mixed gardens, shrubs, and rice fields which have decreased, on the other hand, settlements, plantations and open land have expanded. Furthermore, there are two sub-elements that are the priority for policy direction to reduce the rate of land use change, namely making regulations and firm sanctions on land use errors (E3) and consistency in enforcing land use laws (E4).

scholarly journals Dynamic Model of Land Use Change in Landslide Hazard Zones in Tanah Datar District, West Sumatra

2019 ◽  
Vol 3 (1) ◽  
pp. 67-74
Author(s):  
Indang Dewata
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Dynamic Model ◽  
Dynamic Modeling ◽  
System Analysis ◽  
Dynamic Models ◽  
Forest Area ◽  
Land Resource ◽  
Change Policy ◽  
Policy Direction

Population growth has an impact on land resource needs, pressure on land use will have an impact on environmental degradation. As an effort to reduce pressure, policy efforts in land use are needed. This study aims to develop dynamic models in land use and develop land use policy direction.The method used in dynamic modeling uses system analysis and land change policy direction using ISM analysis. In dynamic modeling, land use change uses three scenarios, namely: optimistic scenario, muder scenario, and pessimistic scenario. In determining the direction of the policy involving all stakeholders as many as 15 experts. The results of dynamic model analysis show that forest area changes from time to time of 1.6 percent per year. Changes in forest areas will have an impact on increasing environmental disasters. As an effort to save the environment, there is a need for law enforcement and strict sanctions against perpetrators of forest area destruction

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